diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst
index d05d531b4ec9..6d421694d98e 100644
--- a/Documentation/admin-guide/kernel-parameters.rst
+++ b/Documentation/admin-guide/kernel-parameters.rst
@@ -127,6 +127,7 @@ parameter is applicable::
NET Appropriate network support is enabled.
NUMA NUMA support is enabled.
NFS Appropriate NFS support is enabled.
+ OF Devicetree is enabled.
OSS OSS sound support is enabled.
PV_OPS A paravirtualized kernel is enabled.
PARIDE The ParIDE (parallel port IDE) subsystem is enabled.
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 1fda057434c3..b25b47a47acd 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3240,6 +3240,12 @@
This can be set from sysctl after boot.
See Documentation/admin-guide/sysctl/vm.rst for details.
+ of_devlink [OF, KNL] Create device links between consumer and
+ supplier devices by scanning the devictree to infer the
+ consumer/supplier relationships. A consumer device
+ will not be probed until all the supplier devices have
+ probed successfully.
+
ohci1394_dma=early [HW] enable debugging via the ohci1394 driver.
See Documentation/debugging-via-ohci1394.txt for more
info.
diff --git a/Documentation/driver-api/device_link.rst b/Documentation/driver-api/device_link.rst
index 1b5020ec6517..bc2d89af88ce 100644
--- a/Documentation/driver-api/device_link.rst
+++ b/Documentation/driver-api/device_link.rst
@@ -281,7 +281,8 @@ State machine
:c:func:`driver_bound()`.)
* Before a consumer device is probed, presence of supplier drivers is
- verified by checking that links to suppliers are in ``DL_STATE_AVAILABLE``
+ verified by checking the consumer device is not in the wait_for_suppliers
+ list and by checking that links to suppliers are in ``DL_STATE_AVAILABLE``
state. The state of the links is updated to ``DL_STATE_CONSUMER_PROBE``.
(Call to :c:func:`device_links_check_suppliers()` from
:c:func:`really_probe()`.)
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index a100bef54952..4ab193319d8c 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -316,6 +316,10 @@ IOMAP
devm_ioremap_nocache()
devm_ioremap_wc()
devm_ioremap_resource() : checks resource, requests memory region, ioremaps
+ devm_ioremap_resource_wc()
+ devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device
+ devm_platform_ioremap_resource_wc()
+ devm_platform_ioremap_resource_byname()
devm_iounmap()
pcim_iomap()
pcim_iomap_regions() : do request_region() and iomap() on multiple BARs
diff --git a/Documentation/driver-api/driver-model/driver.rst b/Documentation/driver-api/driver-model/driver.rst
index 11d281506a04..baa6a85c8287 100644
--- a/Documentation/driver-api/driver-model/driver.rst
+++ b/Documentation/driver-api/driver-model/driver.rst
@@ -169,6 +169,49 @@ A driver's probe() may return a negative errno value to indicate that
the driver did not bind to this device, in which case it should have
released all resources it allocated::
+ void (*sync_state)(struct device *dev);
+
+sync_state is called only once for a device. It's called when all the consumer
+devices of the device have successfully probed. The list of consumers of the
+device is obtained by looking at the device links connecting that device to its
+consumer devices.
+
+The first attempt to call sync_state() is made during late_initcall_sync() to
+give firmware and drivers time to link devices to each other. During the first
+attempt at calling sync_state(), if all the consumers of the device at that
+point in time have already probed successfully, sync_state() is called right
+away. If there are no consumers of the device during the first attempt, that
+too is considered as "all consumers of the device have probed" and sync_state()
+is called right away.
+
+If during the first attempt at calling sync_state() for a device, there are
+still consumers that haven't probed successfully, the sync_state() call is
+postponed and reattempted in the future only when one or more consumers of the
+device probe successfully. If during the reattempt, the driver core finds that
+there are one or more consumers of the device that haven't probed yet, then
+sync_state() call is postponed again.
+
+A typical use case for sync_state() is to have the kernel cleanly take over
+management of devices from the bootloader. For example, if a device is left on
+and at a particular hardware configuration by the bootloader, the device's
+driver might need to keep the device in the boot configuration until all the
+consumers of the device have probed. Once all the consumers of the device have
+probed, the device's driver can synchronize the hardware state of the device to
+match the aggregated software state requested by all the consumers. Hence the
+name sync_state().
+
+While obvious examples of resources that can benefit from sync_state() include
+resources such as regulator, sync_state() can also be useful for complex
+resources like IOMMUs. For example, IOMMUs with multiple consumers (devices
+whose addresses are remapped by the IOMMU) might need to keep their mappings
+fixed at (or additive to) the boot configuration until all its consumers have
+probed.
+
+While the typical use case for sync_state() is to have the kernel cleanly take
+over management of devices from the bootloader, the usage of sync_state() is
+not restricted to that. Use it whenever it makes sense to take an action after
+all the consumers of a device have probed.
+
int (*remove) (struct device *dev);
remove is called to unbind a driver from a device. This may be
diff --git a/Documentation/filesystems/debugfs.txt b/Documentation/filesystems/debugfs.txt
index 9e27c843d00e..dc497b96fa4f 100644
--- a/Documentation/filesystems/debugfs.txt
+++ b/Documentation/filesystems/debugfs.txt
@@ -68,41 +68,49 @@ actually necessary; the debugfs code provides a number of helper functions
for simple situations. Files containing a single integer value can be
created with any of:
- struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value);
- struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value);
+ void debugfs_create_u8(const char *name, umode_t mode,
+ struct dentry *parent, u8 *value);
+ void debugfs_create_u16(const char *name, umode_t mode,
+ struct dentry *parent, u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent, u32 *value);
- struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value);
+ void debugfs_create_u64(const char *name, umode_t mode,
+ struct dentry *parent, u64 *value);
These files support both reading and writing the given value; if a specific
file should not be written to, simply set the mode bits accordingly. The
values in these files are in decimal; if hexadecimal is more appropriate,
the following functions can be used instead:
- struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value);
- struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value);
- struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent, u32 *value);
- struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value);
+ void debugfs_create_x8(const char *name, umode_t mode,
+ struct dentry *parent, u8 *value);
+ void debugfs_create_x16(const char *name, umode_t mode,
+ struct dentry *parent, u16 *value);
+ void debugfs_create_x32(const char *name, umode_t mode,
+ struct dentry *parent, u32 *value);
+ void debugfs_create_x64(const char *name, umode_t mode,
+ struct dentry *parent, u64 *value);
These functions are useful as long as the developer knows the size of the
value to be exported. Some types can have different widths on different
-architectures, though, complicating the situation somewhat. There is a
-function meant to help out in one special case:
+architectures, though, complicating the situation somewhat. There are
+functions meant to help out in such special cases:
- struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent,
- size_t *value);
+ void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value);
As might be expected, this function will create a debugfs file to represent
a variable of type size_t.
+Similarly, there are helpers for variables of type unsigned long, in decimal
+and hexadecimal:
+
+ struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
+ struct dentry *parent,
+ unsigned long *value);
+ void debugfs_create_xul(const char *name, umode_t mode,
+ struct dentry *parent, unsigned long *value);
+
Boolean values can be placed in debugfs with:
struct dentry *debugfs_create_bool(const char *name, umode_t mode,
@@ -114,8 +122,8 @@ lower-case values, or 1 or 0. Any other input will be silently ignored.
Also, atomic_t values can be placed in debugfs with:
- struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value)
+ void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent, atomic_t *value)
A read of this file will get atomic_t values, and a write of this file
will set atomic_t values.
diff --git a/arch/powerpc/platforms/pseries/dtl.c b/arch/powerpc/platforms/pseries/dtl.c
index 2b87480f2837..eab8aa293743 100644
--- a/arch/powerpc/platforms/pseries/dtl.c
+++ b/arch/powerpc/platforms/pseries/dtl.c
@@ -19,7 +19,6 @@
struct dtl {
struct dtl_entry *buf;
- struct dentry *file;
int cpu;
int buf_entries;
u64 last_idx;
@@ -320,46 +319,28 @@ static const struct file_operations dtl_fops = {
static struct dentry *dtl_dir;
-static int dtl_setup_file(struct dtl *dtl)
+static void dtl_setup_file(struct dtl *dtl)
{
char name[10];
sprintf(name, "cpu-%d", dtl->cpu);
- dtl->file = debugfs_create_file(name, 0400, dtl_dir, dtl, &dtl_fops);
- if (!dtl->file)
- return -ENOMEM;
-
- return 0;
+ debugfs_create_file(name, 0400, dtl_dir, dtl, &dtl_fops);
}
static int dtl_init(void)
{
- struct dentry *event_mask_file, *buf_entries_file;
- int rc, i;
+ int i;
if (!firmware_has_feature(FW_FEATURE_SPLPAR))
return -ENODEV;
/* set up common debugfs structure */
- rc = -ENOMEM;
dtl_dir = debugfs_create_dir("dtl", powerpc_debugfs_root);
- if (!dtl_dir) {
- printk(KERN_WARNING "%s: can't create dtl root dir\n",
- __func__);
- goto err;
- }
- event_mask_file = debugfs_create_x8("dtl_event_mask", 0600,
- dtl_dir, &dtl_event_mask);
- buf_entries_file = debugfs_create_u32("dtl_buf_entries", 0400,
- dtl_dir, &dtl_buf_entries);
-
- if (!event_mask_file || !buf_entries_file) {
- printk(KERN_WARNING "%s: can't create dtl files\n", __func__);
- goto err_remove_dir;
- }
+ debugfs_create_x8("dtl_event_mask", 0600, dtl_dir, &dtl_event_mask);
+ debugfs_create_u32("dtl_buf_entries", 0400, dtl_dir, &dtl_buf_entries);
/* set up the per-cpu log structures */
for_each_possible_cpu(i) {
@@ -367,16 +348,9 @@ static int dtl_init(void)
spin_lock_init(&dtl->lock);
dtl->cpu = i;
- rc = dtl_setup_file(dtl);
- if (rc)
- goto err_remove_dir;
+ dtl_setup_file(dtl);
}
return 0;
-
-err_remove_dir:
- debugfs_remove_recursive(dtl_dir);
-err:
- return rc;
}
machine_arch_initcall(pseries, dtl_init);
diff --git a/arch/powerpc/platforms/pseries/hvCall_inst.c b/arch/powerpc/platforms/pseries/hvCall_inst.c
index bcc1b67417a8..c40c62ec432e 100644
--- a/arch/powerpc/platforms/pseries/hvCall_inst.c
+++ b/arch/powerpc/platforms/pseries/hvCall_inst.c
@@ -129,7 +129,6 @@ static void probe_hcall_exit(void *ignored, unsigned long opcode, long retval,
static int __init hcall_inst_init(void)
{
struct dentry *hcall_root;
- struct dentry *hcall_file;
char cpu_name_buf[CPU_NAME_BUF_SIZE];
int cpu;
@@ -145,17 +144,12 @@ static int __init hcall_inst_init(void)
}
hcall_root = debugfs_create_dir(HCALL_ROOT_DIR, NULL);
- if (!hcall_root)
- return -ENOMEM;
for_each_possible_cpu(cpu) {
snprintf(cpu_name_buf, CPU_NAME_BUF_SIZE, "cpu%d", cpu);
- hcall_file = debugfs_create_file(cpu_name_buf, 0444,
- hcall_root,
- per_cpu(hcall_stats, cpu),
- &hcall_inst_seq_fops);
- if (!hcall_file)
- return -ENOMEM;
+ debugfs_create_file(cpu_name_buf, 0444, hcall_root,
+ per_cpu(hcall_stats, cpu),
+ &hcall_inst_seq_fops);
}
return 0;
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index f87a5c64e24d..f9f57c55655e 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -1998,24 +1998,11 @@ static int __init vpa_debugfs_init(void)
return 0;
vpa_dir = debugfs_create_dir("vpa", powerpc_debugfs_root);
- if (!vpa_dir) {
- pr_warn("%s: can't create vpa root dir\n", __func__);
- return -ENOMEM;
- }
/* set up the per-cpu vpa file*/
for_each_possible_cpu(i) {
- struct dentry *d;
-
sprintf(name, "cpu-%ld", i);
-
- d = debugfs_create_file(name, 0400, vpa_dir, (void *)i,
- &vpa_fops);
- if (!d) {
- pr_warn("%s: can't create per-cpu vpa file\n",
- __func__);
- return -ENOMEM;
- }
+ debugfs_create_file(name, 0400, vpa_dir, (void *)i, &vpa_fops);
}
return 0;
diff --git a/arch/sh/drivers/Makefile b/arch/sh/drivers/Makefile
index 3e93b434e604..56b0acace6e7 100644
--- a/arch/sh/drivers/Makefile
+++ b/arch/sh/drivers/Makefile
@@ -3,7 +3,7 @@
# Makefile for the Linux SuperH-specific device drivers.
#
-obj-y += dma/
+obj-y += dma/ platform_early.o
obj-$(CONFIG_PCI) += pci/
obj-$(CONFIG_SUPERHYWAY) += superhyway/
diff --git a/arch/sh/drivers/platform_early.c b/arch/sh/drivers/platform_early.c
new file mode 100644
index 000000000000..f6d148451dfc
--- /dev/null
+++ b/arch/sh/drivers/platform_early.c
@@ -0,0 +1,347 @@
+// SPDX--License-Identifier: GPL-2.0
+
+#include <asm/platform_early.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pm.h>
+
+static __initdata LIST_HEAD(sh_early_platform_driver_list);
+static __initdata LIST_HEAD(sh_early_platform_device_list);
+
+static const struct platform_device_id *
+platform_match_id(const struct platform_device_id *id,
+ struct platform_device *pdev)
+{
+ while (id->name[0]) {
+ if (strcmp(pdev->name, id->name) == 0) {
+ pdev->id_entry = id;
+ return id;
+ }
+ id++;
+ }
+ return NULL;
+}
+
+static int platform_match(struct device *dev, struct device_driver *drv)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct platform_driver *pdrv = to_platform_driver(drv);
+
+ /* When driver_override is set, only bind to the matching driver */
+ if (pdev->driver_override)
+ return !strcmp(pdev->driver_override, drv->name);
+
+ /* Then try to match against the id table */
+ if (pdrv->id_table)
+ return platform_match_id(pdrv->id_table, pdev) != NULL;
+
+ /* fall-back to driver name match */
+ return (strcmp(pdev->name, drv->name) == 0);
+}
+
+#ifdef CONFIG_PM
+static void device_pm_init_common(struct device *dev)
+{
+ if (!dev->power.early_init) {
+ spin_lock_init(&dev->power.lock);
+ dev->power.qos = NULL;
+ dev->power.early_init = true;
+ }
+}
+
+static void pm_runtime_early_init(struct device *dev)
+{
+ dev->power.disable_depth = 1;
+ device_pm_init_common(dev);
+}
+#else
+static void pm_runtime_early_init(struct device *dev) {}
+#endif
+
+/**
+ * sh_early_platform_driver_register - register early platform driver
+ * @epdrv: sh_early_platform driver structure
+ * @buf: string passed from early_param()
+ *
+ * Helper function for sh_early_platform_init() / sh_early_platform_init_buffer()
+ */
+int __init sh_early_platform_driver_register(struct sh_early_platform_driver *epdrv,
+ char *buf)
+{
+ char *tmp;
+ int n;
+
+ /* Simply add the driver to the end of the global list.
+ * Drivers will by default be put on the list in compiled-in order.
+ */
+ if (!epdrv->list.next) {
+ INIT_LIST_HEAD(&epdrv->list);
+ list_add_tail(&epdrv->list, &sh_early_platform_driver_list);
+ }
+
+ /* If the user has specified device then make sure the driver
+ * gets prioritized. The driver of the last device specified on
+ * command line will be put first on the list.
+ */
+ n = strlen(epdrv->pdrv->driver.name);
+ if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) {
+ list_move(&epdrv->list, &sh_early_platform_driver_list);
+
+ /* Allow passing parameters after device name */
+ if (buf[n] == '\0' || buf[n] == ',')
+ epdrv->requested_id = -1;
+ else {
+ epdrv->requested_id = simple_strtoul(&buf[n + 1],
+ &tmp, 10);
+
+ if (buf[n] != '.' || (tmp == &buf[n + 1])) {
+ epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
+ n = 0;
+ } else
+ n += strcspn(&buf[n + 1], ",") + 1;
+ }
+
+ if (buf[n] == ',')
+ n++;
+
+ if (epdrv->bufsize) {
+ memcpy(epdrv->buffer, &buf[n],
+ min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1));
+ epdrv->buffer[epdrv->bufsize - 1] = '\0';
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * sh_early_platform_add_devices - adds a number of early platform devices
+ * @devs: array of early platform devices to add
+ * @num: number of early platform devices in array
+ *
+ * Used by early architecture code to register early platform devices and
+ * their platform data.
+ */
+void __init sh_early_platform_add_devices(struct platform_device **devs, int num)
+{
+ struct device *dev;
+ int i;
+
+ /* simply add the devices to list */
+ for (i = 0; i < num; i++) {
+ dev = &devs[i]->dev;
+
+ if (!dev->devres_head.next) {
+ pm_runtime_early_init(dev);
+ INIT_LIST_HEAD(&dev->devres_head);
+ list_add_tail(&dev->devres_head,
+ &sh_early_platform_device_list);
+ }
+ }
+}
+
+/**
+ * sh_early_platform_driver_register_all - register early platform drivers
+ * @class_str: string to identify early platform driver class
+ *
+ * Used by architecture code to register all early platform drivers
+ * for a certain class. If omitted then only early platform drivers
+ * with matching kernel command line class parameters will be registered.
+ */
+void __init sh_early_platform_driver_register_all(char *class_str)
+{
+ /* The "class_str" parameter may or may not be present on the kernel
+ * command line. If it is present then there may be more than one
+ * matching parameter.
+ *
+ * Since we register our early platform drivers using early_param()
+ * we need to make sure that they also get registered in the case
+ * when the parameter is missing from the kernel command line.
+ *
+ * We use parse_early_options() to make sure the early_param() gets
+ * called at least once. The early_param() may be called more than
+ * once since the name of the preferred device may be specified on
+ * the kernel command line. sh_early_platform_driver_register() handles
+ * this case for us.
+ */
+ parse_early_options(class_str);
+}
+
+/**
+ * sh_early_platform_match - find early platform device matching driver
+ * @epdrv: early platform driver structure
+ * @id: id to match against
+ */
+static struct platform_device * __init
+sh_early_platform_match(struct sh_early_platform_driver *epdrv, int id)
+{
+ struct platform_device *pd;
+
+ list_for_each_entry(pd, &sh_early_platform_device_list, dev.devres_head)
+ if (platform_match(&pd->dev, &epdrv->pdrv->driver))
+ if (pd->id == id)
+ return pd;
+
+ return NULL;
+}
+
+/**
+ * sh_early_platform_left - check if early platform driver has matching devices
+ * @epdrv: early platform driver structure
+ * @id: return true if id or above exists
+ */
+static int __init sh_early_platform_left(struct sh_early_platform_driver *epdrv,
+ int id)
+{
+ struct platform_device *pd;
+
+ list_for_each_entry(pd, &sh_early_platform_device_list, dev.devres_head)
+ if (platform_match(&pd->dev, &epdrv->pdrv->driver))
+ if (pd->id >= id)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * sh_early_platform_driver_probe_id - probe drivers matching class_str and id
+ * @class_str: string to identify early platform driver class
+ * @id: id to match against
+ * @nr_probe: number of platform devices to successfully probe before exiting
+ */
+static int __init sh_early_platform_driver_probe_id(char *class_str,
+ int id,
+ int nr_probe)
+{
+ struct sh_early_platform_driver *epdrv;
+ struct platform_device *match;
+ int match_id;
+ int n = 0;
+ int left = 0;
+
+ list_for_each_entry(epdrv, &sh_early_platform_driver_list, list) {
+ /* only use drivers matching our class_str */
+ if (strcmp(class_str, epdrv->class_str))
+ continue;
+
+ if (id == -2) {
+ match_id = epdrv->requested_id;
+ left = 1;
+
+ } else {
+ match_id = id;
+ left += sh_early_platform_left(epdrv, id);
+
+ /* skip requested id */
+ switch (epdrv->requested_id) {
+ case EARLY_PLATFORM_ID_ERROR:
+ case EARLY_PLATFORM_ID_UNSET:
+ break;
+ default:
+ if (epdrv->requested_id == id)
+ match_id = EARLY_PLATFORM_ID_UNSET;
+ }
+ }
+
+ switch (match_id) {
+ case EARLY_PLATFORM_ID_ERROR:
+ pr_warn("%s: unable to parse %s parameter\n",
+ class_str, epdrv->pdrv->driver.name);
+ /* fall-through */
+ case EARLY_PLATFORM_ID_UNSET:
+ match = NULL;
+ break;
+ default:
+ match = sh_early_platform_match(epdrv, match_id);
+ }
+
+ if (match) {
+ /*
+ * Set up a sensible init_name to enable
+ * dev_name() and others to be used before the
+ * rest of the driver core is initialized.
+ */
+ if (!match->dev.init_name && slab_is_available()) {
+ if (match->id != -1)
+ match->dev.init_name =
+ kasprintf(GFP_KERNEL, "%s.%d",
+ match->name,
+ match->id);
+ else
+ match->dev.init_name =
+ kasprintf(GFP_KERNEL, "%s",
+ match->name);
+
+ if (!match->dev.init_name)
+ return -ENOMEM;
+ }
+
+ if (epdrv->pdrv->probe(match))
+ pr_warn("%s: unable to probe %s early.\n",
+ class_str, match->name);
+ else
+ n++;
+ }
+
+ if (n >= nr_probe)
+ break;
+ }
+
+ if (left)
+ return n;
+ else
+ return -ENODEV;
+}
+
+/**
+ * sh_early_platform_driver_probe - probe a class of registered drivers
+ * @class_str: string to identify early platform driver class
+ * @nr_probe: number of platform devices to successfully probe before exiting
+ * @user_only: only probe user specified early platform devices
+ *
+ * Used by architecture code to probe registered early platform drivers
+ * within a certain class. For probe to happen a registered early platform
+ * device matching a registered early platform driver is needed.
+ */
+int __init sh_early_platform_driver_probe(char *class_str,
+ int nr_probe,
+ int user_only)
+{
+ int k, n, i;
+
+ n = 0;
+ for (i = -2; n < nr_probe; i++) {
+ k = sh_early_platform_driver_probe_id(class_str, i, nr_probe - n);
+
+ if (k < 0)
+ break;
+
+ n += k;
+
+ if (user_only)
+ break;
+ }
+
+ return n;
+}
+
+/**
+ * sh_early_platform_cleanup - clean up early platform code
+ */
+static int __init sh_early_platform_cleanup(void)
+{
+ struct platform_device *pd, *pd2;
+
+ /* clean up the devres list used to chain devices */
+ list_for_each_entry_safe(pd, pd2, &sh_early_platform_device_list,
+ dev.devres_head) {
+ list_del(&pd->dev.devres_head);
+ memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head));
+ }
+
+ return 0;
+}
+/*
+ * This must happen once after all early devices are probed but before probing
+ * real platform devices.
+ */
+subsys_initcall(sh_early_platform_cleanup);
diff --git a/arch/sh/include/asm/platform_early.h b/arch/sh/include/asm/platform_early.h
new file mode 100644
index 000000000000..fc802137c37d
--- /dev/null
+++ b/arch/sh/include/asm/platform_early.h
@@ -0,0 +1,61 @@
+/* SPDX--License-Identifier: GPL-2.0 */
+
+#ifndef __PLATFORM_EARLY__
+#define __PLATFORM_EARLY__
+
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+struct sh_early_platform_driver {
+ const char *class_str;
+ struct platform_driver *pdrv;
+ struct list_head list;
+ int requested_id;
+ char *buffer;
+ int bufsize;
+};
+
+#define EARLY_PLATFORM_ID_UNSET -2
+#define EARLY_PLATFORM_ID_ERROR -3
+
+extern int sh_early_platform_driver_register(struct sh_early_platform_driver *epdrv,
+ char *buf);
+extern void sh_early_platform_add_devices(struct platform_device **devs, int num);
+
+static inline int is_sh_early_platform_device(struct platform_device *pdev)
+{
+ return !pdev->dev.driver;
+}
+
+extern void sh_early_platform_driver_register_all(char *class_str);
+extern int sh_early_platform_driver_probe(char *class_str,
+ int nr_probe, int user_only);
+
+#define sh_early_platform_init(class_string, platdrv) \
+ sh_early_platform_init_buffer(class_string, platdrv, NULL, 0)
+
+#ifndef MODULE
+#define sh_early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
+static __initdata struct sh_early_platform_driver early_driver = { \
+ .class_str = class_string, \
+ .buffer = buf, \
+ .bufsize = bufsiz, \
+ .pdrv = platdrv, \
+ .requested_id = EARLY_PLATFORM_ID_UNSET, \
+}; \
+static int __init sh_early_platform_driver_setup_func(char *buffer) \
+{ \
+ return sh_early_platform_driver_register(&early_driver, buffer); \
+} \
+early_param(class_string, sh_early_platform_driver_setup_func)
+#else /* MODULE */
+#define sh_early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
+static inline char *sh_early_platform_driver_setup_func(void) \
+{ \
+ return bufsiz ? buf : NULL; \
+}
+#endif /* MODULE */
+
+#endif /* __PLATFORM_EARLY__ */
diff --git a/arch/sh/kernel/cpu/sh2/setup-sh7619.c b/arch/sh/kernel/cpu/sh2/setup-sh7619.c
index f5b6841ef7e1..b1c877b6a420 100644
--- a/arch/sh/kernel/cpu/sh2/setup-sh7619.c
+++ b/arch/sh/kernel/cpu/sh2/setup-sh7619.c
@@ -12,6 +12,7 @@
#include <linux/sh_eth.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -199,6 +200,6 @@ void __init plat_early_device_setup(void)
/* enable CMT clock */
__raw_writeb(__raw_readb(STBCR3) & ~0x10, STBCR3);
- early_platform_add_devices(sh7619_early_devices,
+ sh_early_platform_add_devices(sh7619_early_devices,
ARRAY_SIZE(sh7619_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh2a/setup-mxg.c b/arch/sh/kernel/cpu/sh2a/setup-mxg.c
index 52350ad0b0a2..cefa07924c16 100644
--- a/arch/sh/kernel/cpu/sh2a/setup-mxg.c
+++ b/arch/sh/kernel/cpu/sh2a/setup-mxg.c
@@ -9,6 +9,7 @@
#include <linux/serial.h>
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -169,6 +170,6 @@ static struct platform_device *mxg_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(mxg_early_devices,
+ sh_early_platform_add_devices(mxg_early_devices,
ARRAY_SIZE(mxg_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh2a/setup-sh7201.c b/arch/sh/kernel/cpu/sh2a/setup-sh7201.c
index b51ed761ae08..28f1bebf3405 100644
--- a/arch/sh/kernel/cpu/sh2a/setup-sh7201.c
+++ b/arch/sh/kernel/cpu/sh2a/setup-sh7201.c
@@ -11,6 +11,7 @@
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -412,6 +413,6 @@ void __init plat_early_device_setup(void)
/* enable MTU2 clock */
__raw_writeb(__raw_readb(STBCR3) & ~0x20, STBCR3);
- early_platform_add_devices(sh7201_early_devices,
+ sh_early_platform_add_devices(sh7201_early_devices,
ARRAY_SIZE(sh7201_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh2a/setup-sh7203.c b/arch/sh/kernel/cpu/sh2a/setup-sh7203.c
index 89b3e49fc250..4839f3aaeb4c 100644
--- a/arch/sh/kernel/cpu/sh2a/setup-sh7203.c
+++ b/arch/sh/kernel/cpu/sh2a/setup-sh7203.c
@@ -10,6 +10,7 @@
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -349,6 +350,6 @@ void __init plat_early_device_setup(void)
/* enable MTU2 clock */
__raw_writeb(__raw_readb(STBCR3) & ~0x20, STBCR3);
- early_platform_add_devices(sh7203_early_devices,
+ sh_early_platform_add_devices(sh7203_early_devices,
ARRAY_SIZE(sh7203_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh2a/setup-sh7206.c b/arch/sh/kernel/cpu/sh2a/setup-sh7206.c
index 36ff3a3139da..68add5af4cc5 100644
--- a/arch/sh/kernel/cpu/sh2a/setup-sh7206.c
+++ b/arch/sh/kernel/cpu/sh2a/setup-sh7206.c
@@ -11,6 +11,7 @@
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -285,6 +286,6 @@ void __init plat_early_device_setup(void)
/* enable MTU2 clock */
__raw_writeb(__raw_readb(STBCR3) & ~0x20, STBCR3);
- early_platform_add_devices(sh7206_early_devices,
+ sh_early_platform_add_devices(sh7206_early_devices,
ARRAY_SIZE(sh7206_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh2a/setup-sh7264.c b/arch/sh/kernel/cpu/sh2a/setup-sh7264.c
index d199618d877c..8a1cb613dd2e 100644
--- a/arch/sh/kernel/cpu/sh2a/setup-sh7264.c
+++ b/arch/sh/kernel/cpu/sh2a/setup-sh7264.c
@@ -11,6 +11,7 @@
#include <linux/usb/r8a66597.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -546,6 +547,6 @@ static struct platform_device *sh7264_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7264_early_devices,
+ sh_early_platform_add_devices(sh7264_early_devices,
ARRAY_SIZE(sh7264_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh2a/setup-sh7269.c b/arch/sh/kernel/cpu/sh2a/setup-sh7269.c
index 9095c960b455..8b1ef3028320 100644
--- a/arch/sh/kernel/cpu/sh2a/setup-sh7269.c
+++ b/arch/sh/kernel/cpu/sh2a/setup-sh7269.c
@@ -12,6 +12,7 @@
#include <linux/usb/r8a66597.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -562,6 +563,6 @@ static struct platform_device *sh7269_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7269_early_devices,
+ sh_early_platform_add_devices(sh7269_early_devices,
ARRAY_SIZE(sh7269_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh3/setup-sh3.c b/arch/sh/kernel/cpu/sh3/setup-sh3.c
index 8058c01cf09d..cf2a3f09fee4 100644
--- a/arch/sh/kernel/cpu/sh3/setup-sh3.c
+++ b/arch/sh/kernel/cpu/sh3/setup-sh3.c
@@ -8,6 +8,7 @@
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
/* All SH3 devices are equipped with IRQ0->5 (except sh7708) */
diff --git a/arch/sh/kernel/cpu/sh3/setup-sh7705.c b/arch/sh/kernel/cpu/sh3/setup-sh7705.c
index e19d1ce7b6ad..0544134b3f20 100644
--- a/arch/sh/kernel/cpu/sh3/setup-sh7705.c
+++ b/arch/sh/kernel/cpu/sh3/setup-sh7705.c
@@ -14,6 +14,7 @@
#include <linux/sh_intc.h>
#include <asm/rtc.h>
#include <cpu/serial.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -178,7 +179,7 @@ static struct platform_device *sh7705_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7705_early_devices,
+ sh_early_platform_add_devices(sh7705_early_devices,
ARRAY_SIZE(sh7705_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh3/setup-sh770x.c b/arch/sh/kernel/cpu/sh3/setup-sh770x.c
index 5c5144bee6bc..4947f57748bc 100644
--- a/arch/sh/kernel/cpu/sh3/setup-sh770x.c
+++ b/arch/sh/kernel/cpu/sh3/setup-sh770x.c
@@ -18,6 +18,7 @@
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <cpu/serial.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -230,7 +231,7 @@ static struct platform_device *sh770x_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh770x_early_devices,
+ sh_early_platform_add_devices(sh770x_early_devices,
ARRAY_SIZE(sh770x_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh3/setup-sh7710.c b/arch/sh/kernel/cpu/sh3/setup-sh7710.c
index 4776e2495738..381910761579 100644
--- a/arch/sh/kernel/cpu/sh3/setup-sh7710.c
+++ b/arch/sh/kernel/cpu/sh3/setup-sh7710.c
@@ -13,6 +13,7 @@
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <asm/rtc.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -177,7 +178,7 @@ static struct platform_device *sh7710_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7710_early_devices,
+ sh_early_platform_add_devices(sh7710_early_devices,
ARRAY_SIZE(sh7710_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh3/setup-sh7720.c b/arch/sh/kernel/cpu/sh3/setup-sh7720.c
index 1d4c34e7b7db..425d067dae9b 100644
--- a/arch/sh/kernel/cpu/sh3/setup-sh7720.c
+++ b/arch/sh/kernel/cpu/sh3/setup-sh7720.c
@@ -19,6 +19,7 @@
#include <linux/sh_intc.h>
#include <linux/usb/ohci_pdriver.h>
#include <asm/rtc.h>
+#include <asm/platform_early.h>
#include <cpu/serial.h>
static struct resource rtc_resources[] = {
@@ -211,7 +212,7 @@ static struct platform_device *sh7720_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7720_early_devices,
+ sh_early_platform_add_devices(sh7720_early_devices,
ARRAY_SIZE(sh7720_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4/setup-sh4-202.c b/arch/sh/kernel/cpu/sh4/setup-sh4-202.c
index a40ef35d101a..e6737f3d0df2 100644
--- a/arch/sh/kernel/cpu/sh4/setup-sh4-202.c
+++ b/arch/sh/kernel/cpu/sh4/setup-sh4-202.c
@@ -12,6 +12,7 @@
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE,
@@ -76,7 +77,7 @@ static struct platform_device *sh4202_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh4202_early_devices,
+ sh_early_platform_add_devices(sh4202_early_devices,
ARRAY_SIZE(sh4202_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4/setup-sh7750.c b/arch/sh/kernel/cpu/sh4/setup-sh7750.c
index b37bda66a532..19c8f1d69071 100644
--- a/arch/sh/kernel/cpu/sh4/setup-sh7750.c
+++ b/arch/sh/kernel/cpu/sh4/setup-sh7750.c
@@ -13,6 +13,7 @@
#include <linux/sh_intc.h>
#include <linux/serial_sci.h>
#include <generated/machtypes.h>
+#include <asm/platform_early.h>
static struct resource rtc_resources[] = {
[0] = {
@@ -161,15 +162,15 @@ void __init plat_early_device_setup(void)
if (mach_is_rts7751r2d()) {
scif_platform_data.scscr |= SCSCR_CKE1;
dev[0] = &scif_device;
- early_platform_add_devices(dev, 1);
+ sh_early_platform_add_devices(dev, 1);
} else {
dev[0] = &sci_device;
- early_platform_add_devices(dev, 1);
+ sh_early_platform_add_devices(dev, 1);
dev[0] = &scif_device;
- early_platform_add_devices(dev, 1);
+ sh_early_platform_add_devices(dev, 1);
}
- early_platform_add_devices(sh7750_early_devices,
+ sh_early_platform_add_devices(sh7750_early_devices,
ARRAY_SIZE(sh7750_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4/setup-sh7760.c b/arch/sh/kernel/cpu/sh4/setup-sh7760.c
index 86845da85997..14212f5d803c 100644
--- a/arch/sh/kernel/cpu/sh4/setup-sh7760.c
+++ b/arch/sh/kernel/cpu/sh4/setup-sh7760.c
@@ -11,6 +11,7 @@
#include <linux/sh_intc.h>
#include <linux/serial_sci.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
@@ -271,7 +272,7 @@ static struct platform_device *sh7760_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7760_early_devices,
+ sh_early_platform_add_devices(sh7760_early_devices,
ARRAY_SIZE(sh7760_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7343.c b/arch/sh/kernel/cpu/sh4a/setup-sh7343.c
index a15e25690b5f..b6015188fab1 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7343.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7343.c
@@ -12,6 +12,7 @@
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <asm/clock.h>
+#include <asm/platform_early.h>
/* Serial */
static struct plat_sci_port scif0_platform_data = {
@@ -296,7 +297,7 @@ static struct platform_device *sh7343_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7343_early_devices,
+ sh_early_platform_add_devices(sh7343_early_devices,
ARRAY_SIZE(sh7343_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7366.c b/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
index 7bd2776441ba..6676beef053e 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7366.c
@@ -15,6 +15,7 @@
#include <linux/sh_intc.h>
#include <linux/usb/r8a66597.h>
#include <asm/clock.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE,
@@ -240,7 +241,7 @@ static struct platform_device *sh7366_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7366_early_devices,
+ sh_early_platform_add_devices(sh7366_early_devices,
ARRAY_SIZE(sh7366_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
index 1ce65f88f060..0c6757ef63f4 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
@@ -18,6 +18,7 @@
#include <asm/clock.h>
#include <asm/mmzone.h>
#include <asm/siu.h>
+#include <asm/platform_early.h>
#include <cpu/dma-register.h>
#include <cpu/sh7722.h>
@@ -512,7 +513,7 @@ static struct platform_device *sh7722_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7722_early_devices,
+ sh_early_platform_add_devices(sh7722_early_devices,
ARRAY_SIZE(sh7722_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7723.c b/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
index edb649950662..83ae1ad4a86e 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7723.c
@@ -16,6 +16,7 @@
#include <linux/io.h>
#include <asm/clock.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
#include <cpu/sh7723.h>
/* Serial */
@@ -410,7 +411,7 @@ static struct platform_device *sh7723_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7723_early_devices,
+ sh_early_platform_add_devices(sh7723_early_devices,
ARRAY_SIZE(sh7723_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index 3e9825031d3d..0d990ab1ba2a 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -24,6 +24,7 @@
#include <asm/suspend.h>
#include <asm/clock.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
#include <cpu/dma-register.h>
#include <cpu/sh7724.h>
@@ -830,7 +831,7 @@ static struct platform_device *sh7724_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7724_early_devices,
+ sh_early_platform_add_devices(sh7724_early_devices,
ARRAY_SIZE(sh7724_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7734.c b/arch/sh/kernel/cpu/sh4a/setup-sh7734.c
index 06a91569697a..9911da794358 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7734.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7734.c
@@ -18,6 +18,7 @@
#include <linux/io.h>
#include <asm/clock.h>
#include <asm/irq.h>
+#include <asm/platform_early.h>
#include <cpu/sh7734.h>
/* SCIF */
@@ -280,7 +281,7 @@ static struct platform_device *sh7734_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7734_early_devices,
+ sh_early_platform_add_devices(sh7734_early_devices,
ARRAY_SIZE(sh7734_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7757.c b/arch/sh/kernel/cpu/sh4a/setup-sh7757.c
index 2501ce656511..67e330b7ea46 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7757.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7757.c
@@ -19,6 +19,7 @@
#include <linux/usb/ohci_pdriver.h>
#include <cpu/dma-register.h>
#include <cpu/sh7757.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif2_platform_data = {
.scscr = SCSCR_REIE,
@@ -767,7 +768,7 @@ static struct platform_device *sh7757_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7757_early_devices,
+ sh_early_platform_add_devices(sh7757_early_devices,
ARRAY_SIZE(sh7757_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7763.c b/arch/sh/kernel/cpu/sh4a/setup-sh7763.c
index 419c5efe4a17..b0608664785f 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7763.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7763.c
@@ -14,6 +14,7 @@
#include <linux/io.h>
#include <linux/serial_sci.h>
#include <linux/usb/ohci_pdriver.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE,
@@ -221,7 +222,7 @@ static struct platform_device *sh7763_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7763_early_devices,
+ sh_early_platform_add_devices(sh7763_early_devices,
ARRAY_SIZE(sh7763_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7770.c b/arch/sh/kernel/cpu/sh4a/setup-sh7770.c
index 5fb4cf9b58c6..5efec6ceb04d 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7770.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7770.c
@@ -11,6 +11,7 @@
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE | SCSCR_TOIE,
@@ -316,7 +317,7 @@ static struct platform_device *sh7770_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7770_early_devices,
+ sh_early_platform_add_devices(sh7770_early_devices,
ARRAY_SIZE(sh7770_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
index ab7d6b715865..c818b788ecb0 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
@@ -13,6 +13,7 @@
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <cpu/dma-register.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE | SCSCR_CKE1,
@@ -285,7 +286,7 @@ void __init plat_early_device_setup(void)
scif1_platform_data.scscr &= ~SCSCR_CKE1;
}
- early_platform_add_devices(sh7780_early_devices,
+ sh_early_platform_add_devices(sh7780_early_devices,
ARRAY_SIZE(sh7780_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
index a438da47285d..3b4a414d60a9 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
@@ -14,6 +14,7 @@
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
#include <cpu/dma-register.h>
static struct plat_sci_port scif0_platform_data = {
@@ -353,7 +354,7 @@ static struct platform_device *sh7785_early_devices[] __initdata = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7785_early_devices,
+ sh_early_platform_add_devices(sh7785_early_devices,
ARRAY_SIZE(sh7785_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
index d894165a0ef6..4b0db8259e3d 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
@@ -23,6 +23,7 @@
#include <linux/usb/ohci_pdriver.h>
#include <cpu/dma-register.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE | SCSCR_CKE1,
@@ -834,6 +835,6 @@ arch_initcall(sh7786_devices_setup);
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7786_early_devices,
+ sh_early_platform_add_devices(sh7786_early_devices,
ARRAY_SIZE(sh7786_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh4a/setup-shx3.c b/arch/sh/kernel/cpu/sh4a/setup-shx3.c
index 14aa4552bc45..7014d6d199b3 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-shx3.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-shx3.c
@@ -14,6 +14,7 @@
#include <linux/sh_intc.h>
#include <cpu/shx3.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
/*
* This intentionally only registers SCIF ports 0, 1, and 3. SCIF 2
@@ -152,7 +153,7 @@ arch_initcall(shx3_devices_setup);
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(shx3_early_devices,
+ sh_early_platform_add_devices(shx3_early_devices,
ARRAY_SIZE(shx3_early_devices));
}
diff --git a/arch/sh/kernel/cpu/sh5/setup-sh5.c b/arch/sh/kernel/cpu/sh5/setup-sh5.c
index 41c1673afc0b..dc8476d67244 100644
--- a/arch/sh/kernel/cpu/sh5/setup-sh5.c
+++ b/arch/sh/kernel/cpu/sh5/setup-sh5.c
@@ -12,6 +12,7 @@
#include <linux/mm.h>
#include <linux/sh_timer.h>
#include <asm/addrspace.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.flags = UPF_IOREMAP,
@@ -115,6 +116,6 @@ arch_initcall(sh5_devices_setup);
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh5_early_devices,
+ sh_early_platform_add_devices(sh5_early_devices,
ARRAY_SIZE(sh5_early_devices));
}
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 6ef341f6cfee..d232cfa01877 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -44,6 +44,7 @@
#include <asm/mmu_context.h>
#include <asm/mmzone.h>
#include <asm/sparsemem.h>
+#include <asm/platform_early.h>
/*
* Initialize loops_per_jiffy as 10000000 (1000MIPS).
@@ -328,7 +329,7 @@ void __init setup_arch(char **cmdline_p)
sh_mv_setup();
/* Let earlyprintk output early console messages */
- early_platform_driver_probe("earlyprintk", 1, 1);
+ sh_early_platform_driver_probe("earlyprintk", 1, 1);
#ifdef CONFIG_OF_FLATTREE
#ifdef CONFIG_USE_BUILTIN_DTB
diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index e16b2cd269a3..821a09cbd605 100644
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -18,6 +18,7 @@
#include <linux/rtc.h>
#include <asm/clock.h>
#include <asm/rtc.h>
+#include <asm/platform_early.h>
static void __init sh_late_time_init(void)
{
@@ -30,8 +31,8 @@ static void __init sh_late_time_init(void)
* clocksource and the jiffies clocksource is used transparently
* instead. No error handling is necessary here.
*/
- early_platform_driver_register_all("earlytimer");
- early_platform_driver_probe("earlytimer", 2, 0);
+ sh_early_platform_driver_register_all("earlytimer");
+ sh_early_platform_driver_probe("earlytimer", 2, 0);
}
void __init time_init(void)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 7bd9cd366d41..42a672456432 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -45,6 +45,10 @@ early_param("sysfs.deprecated", sysfs_deprecated_setup);
#endif
/* Device links support. */
+static LIST_HEAD(wait_for_suppliers);
+static DEFINE_MUTEX(wfs_lock);
+static LIST_HEAD(deferred_sync);
+static unsigned int defer_sync_state_count = 1;
#ifdef CONFIG_SRCU
static DEFINE_MUTEX(device_links_lock);
@@ -127,6 +131,9 @@ static int device_is_dependent(struct device *dev, void *target)
return ret;
list_for_each_entry(link, &dev->links.consumers, s_node) {
+ if (link->flags == (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED))
+ continue;
+
if (link->consumer == target)
return 1;
@@ -196,8 +203,11 @@ static int device_reorder_to_tail(struct device *dev, void *not_used)
device_pm_move_last(dev);
device_for_each_child(dev, NULL, device_reorder_to_tail);
- list_for_each_entry(link, &dev->links.consumers, s_node)
+ list_for_each_entry(link, &dev->links.consumers, s_node) {
+ if (link->flags == (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED))
+ continue;
device_reorder_to_tail(link->consumer, NULL);
+ }
return 0;
}
@@ -224,7 +234,8 @@ void device_pm_move_to_tail(struct device *dev)
#define DL_MANAGED_LINK_FLAGS (DL_FLAG_AUTOREMOVE_CONSUMER | \
DL_FLAG_AUTOREMOVE_SUPPLIER | \
- DL_FLAG_AUTOPROBE_CONSUMER)
+ DL_FLAG_AUTOPROBE_CONSUMER | \
+ DL_FLAG_SYNC_STATE_ONLY)
#define DL_ADD_VALID_FLAGS (DL_MANAGED_LINK_FLAGS | DL_FLAG_STATELESS | \
DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE)
@@ -292,6 +303,8 @@ struct device_link *device_link_add(struct device *consumer,
if (!consumer || !supplier || flags & ~DL_ADD_VALID_FLAGS ||
(flags & DL_FLAG_STATELESS && flags & DL_MANAGED_LINK_FLAGS) ||
+ (flags & DL_FLAG_SYNC_STATE_ONLY &&
+ flags != DL_FLAG_SYNC_STATE_ONLY) ||
(flags & DL_FLAG_AUTOPROBE_CONSUMER &&
flags & (DL_FLAG_AUTOREMOVE_CONSUMER |
DL_FLAG_AUTOREMOVE_SUPPLIER)))
@@ -312,11 +325,14 @@ struct device_link *device_link_add(struct device *consumer,
/*
* If the supplier has not been fully registered yet or there is a
- * reverse dependency between the consumer and the supplier already in
- * the graph, return NULL.
+ * reverse (non-SYNC_STATE_ONLY) dependency between the consumer and
+ * the supplier already in the graph, return NULL. If the link is a
+ * SYNC_STATE_ONLY link, we don't check for reverse dependencies
+ * because it only affects sync_state() callbacks.
*/
if (!device_pm_initialized(supplier)
- || device_is_dependent(consumer, supplier)) {
+ || (!(flags & DL_FLAG_SYNC_STATE_ONLY) &&
+ device_is_dependent(consumer, supplier))) {
link = NULL;
goto out;
}
@@ -343,9 +359,14 @@ struct device_link *device_link_add(struct device *consumer,
}
if (flags & DL_FLAG_STATELESS) {
- link->flags |= DL_FLAG_STATELESS;
kref_get(&link->kref);
- goto out;
+ if (link->flags & DL_FLAG_SYNC_STATE_ONLY &&
+ !(link->flags & DL_FLAG_STATELESS)) {
+ link->flags |= DL_FLAG_STATELESS;
+ goto reorder;
+ } else {
+ goto out;
+ }
}
/*
@@ -367,6 +388,12 @@ struct device_link *device_link_add(struct device *consumer,
link->flags |= DL_FLAG_MANAGED;
device_link_init_status(link, consumer, supplier);
}
+ if (link->flags & DL_FLAG_SYNC_STATE_ONLY &&
+ !(flags & DL_FLAG_SYNC_STATE_ONLY)) {
+ link->flags &= ~DL_FLAG_SYNC_STATE_ONLY;
+ goto reorder;
+ }
+
goto out;
}
@@ -406,6 +433,13 @@ struct device_link *device_link_add(struct device *consumer,
flags & DL_FLAG_PM_RUNTIME)
pm_runtime_resume(supplier);
+ if (flags & DL_FLAG_SYNC_STATE_ONLY) {
+ dev_dbg(consumer,
+ "Linked as a sync state only consumer to %s\n",
+ dev_name(supplier));
+ goto out;
+ }
+reorder:
/*
* Move the consumer and all of the devices depending on it to the end
* of dpm_list and the devices_kset list.
@@ -431,6 +465,70 @@ struct device_link *device_link_add(struct device *consumer,
}
EXPORT_SYMBOL_GPL(device_link_add);
+/**
+ * device_link_wait_for_supplier - Add device to wait_for_suppliers list
+ * @consumer: Consumer device
+ *
+ * Marks the @consumer device as waiting for suppliers to become available by
+ * adding it to the wait_for_suppliers list. The consumer device will never be
+ * probed until it's removed from the wait_for_suppliers list.
+ *
+ * The caller is responsible for adding the links to the supplier devices once
+ * they are available and removing the @consumer device from the
+ * wait_for_suppliers list once links to all the suppliers have been created.
+ *
+ * This function is NOT meant to be called from the probe function of the
+ * consumer but rather from code that creates/adds the consumer device.
+ */
+static void device_link_wait_for_supplier(struct device *consumer,
+ bool need_for_probe)
+{
+ mutex_lock(&wfs_lock);
+ list_add_tail(&consumer->links.needs_suppliers, &wait_for_suppliers);
+ consumer->links.need_for_probe = need_for_probe;
+ mutex_unlock(&wfs_lock);
+}
+
+static void device_link_wait_for_mandatory_supplier(struct device *consumer)
+{
+ device_link_wait_for_supplier(consumer, true);
+}
+
+static void device_link_wait_for_optional_supplier(struct device *consumer)
+{
+ device_link_wait_for_supplier(consumer, false);
+}
+
+/**
+ * device_link_add_missing_supplier_links - Add links from consumer devices to
+ * supplier devices, leaving any
+ * consumer with inactive suppliers on
+ * the wait_for_suppliers list
+ *
+ * Loops through all consumers waiting on suppliers and tries to add all their
+ * supplier links. If that succeeds, the consumer device is removed from
+ * wait_for_suppliers list. Otherwise, they are left in the wait_for_suppliers
+ * list. Devices left on the wait_for_suppliers list will not be probed.
+ *
+ * The fwnode add_links callback is expected to return 0 if it has found and
+ * added all the supplier links for the consumer device. It should return an
+ * error if it isn't able to do so.
+ *
+ * The caller of device_link_wait_for_supplier() is expected to call this once
+ * it's aware of potential suppliers becoming available.
+ */
+static void device_link_add_missing_supplier_links(void)
+{
+ struct device *dev, *tmp;
+
+ mutex_lock(&wfs_lock);
+ list_for_each_entry_safe(dev, tmp, &wait_for_suppliers,
+ links.needs_suppliers)
+ if (!fwnode_call_int_op(dev->fwnode, add_links, dev))
+ list_del_init(&dev->links.needs_suppliers);
+ mutex_unlock(&wfs_lock);
+}
+
static void device_link_free(struct device_link *link)
{
while (refcount_dec_not_one(&link->rpm_active))
@@ -565,10 +663,23 @@ int device_links_check_suppliers(struct device *dev)
struct device_link *link;
int ret = 0;
+ /*
+ * Device waiting for supplier to become available is not allowed to
+ * probe.
+ */
+ mutex_lock(&wfs_lock);
+ if (!list_empty(&dev->links.needs_suppliers) &&
+ dev->links.need_for_probe) {
+ mutex_unlock(&wfs_lock);
+ return -EPROBE_DEFER;
+ }
+ mutex_unlock(&wfs_lock);
+
device_links_write_lock();
list_for_each_entry(link, &dev->links.suppliers, c_node) {
- if (!(link->flags & DL_FLAG_MANAGED))
+ if (!(link->flags & DL_FLAG_MANAGED) ||
+ link->flags & DL_FLAG_SYNC_STATE_ONLY)
continue;
if (link->status != DL_STATE_AVAILABLE) {
@@ -584,6 +695,128 @@ int device_links_check_suppliers(struct device *dev)
return ret;
}
+/**
+ * __device_links_queue_sync_state - Queue a device for sync_state() callback
+ * @dev: Device to call sync_state() on
+ * @list: List head to queue the @dev on
+ *
+ * Queues a device for a sync_state() callback when the device links write lock
+ * isn't held. This allows the sync_state() execution flow to use device links
+ * APIs. The caller must ensure this function is called with
+ * device_links_write_lock() held.
+ *
+ * This function does a get_device() to make sure the device is not freed while
+ * on this list.
+ *
+ * So the caller must also ensure that device_links_flush_sync_list() is called
+ * as soon as the caller releases device_links_write_lock(). This is necessary
+ * to make sure the sync_state() is called in a timely fashion and the
+ * put_device() is called on this device.
+ */
+static void __device_links_queue_sync_state(struct device *dev,
+ struct list_head *list)
+{
+ struct device_link *link;
+
+ if (dev->state_synced)
+ return;
+
+ list_for_each_entry(link, &dev->links.consumers, s_node) {
+ if (!(link->flags & DL_FLAG_MANAGED))
+ continue;
+ if (link->status != DL_STATE_ACTIVE)
+ return;
+ }
+
+ /*
+ * Set the flag here to avoid adding the same device to a list more
+ * than once. This can happen if new consumers get added to the device
+ * and probed before the list is flushed.
+ */
+ dev->state_synced = true;
+
+ if (WARN_ON(!list_empty(&dev->links.defer_sync)))
+ return;
+
+ get_device(dev);
+ list_add_tail(&dev->links.defer_sync, list);
+}
+
+/**
+ * device_links_flush_sync_list - Call sync_state() on a list of devices
+ * @list: List of devices to call sync_state() on
+ *
+ * Calls sync_state() on all the devices that have been queued for it. This
+ * function is used in conjunction with __device_links_queue_sync_state().
+ */
+static void device_links_flush_sync_list(struct list_head *list)
+{
+ struct device *dev, *tmp;
+
+ list_for_each_entry_safe(dev, tmp, list, links.defer_sync) {
+ list_del_init(&dev->links.defer_sync);
+
+ device_lock(dev);
+
+ if (dev->bus->sync_state)
+ dev->bus->sync_state(dev);
+ else if (dev->driver && dev->driver->sync_state)
+ dev->driver->sync_state(dev);
+
+ device_unlock(dev);
+
+ put_device(dev);
+ }
+}
+
+void device_links_supplier_sync_state_pause(void)
+{
+ device_links_write_lock();
+ defer_sync_state_count++;
+ device_links_write_unlock();
+}
+
+void device_links_supplier_sync_state_resume(void)
+{
+ struct device *dev, *tmp;
+ LIST_HEAD(sync_list);
+
+ device_links_write_lock();
+ if (!defer_sync_state_count) {
+ WARN(true, "Unmatched sync_state pause/resume!");
+ goto out;
+ }
+ defer_sync_state_count--;
+ if (defer_sync_state_count)
+ goto out;
+
+ list_for_each_entry_safe(dev, tmp, &deferred_sync, links.defer_sync) {
+ /*
+ * Delete from deferred_sync list before queuing it to
+ * sync_list because defer_sync is used for both lists.
+ */
+ list_del_init(&dev->links.defer_sync);
+ __device_links_queue_sync_state(dev, &sync_list);
+ }
+out:
+ device_links_write_unlock();
+
+ device_links_flush_sync_list(&sync_list);
+}
+
+static int sync_state_resume_initcall(void)
+{
+ device_links_supplier_sync_state_resume();
+ return 0;
+}
+late_initcall(sync_state_resume_initcall);
+
+static void __device_links_supplier_defer_sync(struct device *sup)
+{
+ if (list_empty(&sup->links.defer_sync))
+ list_add_tail(&sup->links.defer_sync, &deferred_sync);
+}
+
/**
* device_links_driver_bound - Update device links after probing its driver.
* @dev: Device to update the links for.
@@ -598,6 +831,16 @@ int device_links_check_suppliers(struct device *dev)
void device_links_driver_bound(struct device *dev)
{
struct device_link *link;
+ LIST_HEAD(sync_list);
+
+ /*
+ * If a device probes successfully, it's expected to have created all
+ * the device links it needs to or make new device links as it needs
+ * them. So, it no longer needs to wait on any suppliers.
+ */
+ mutex_lock(&wfs_lock);
+ list_del_init(&dev->links.needs_suppliers);
+ mutex_unlock(&wfs_lock);
device_links_write_lock();
@@ -628,11 +871,19 @@ void device_links_driver_bound(struct device *dev)
WARN_ON(link->status != DL_STATE_CONSUMER_PROBE);
WRITE_ONCE(link->status, DL_STATE_ACTIVE);
+
+ if (defer_sync_state_count)
+ __device_links_supplier_defer_sync(link->supplier);
+ else
+ __device_links_queue_sync_state(link->supplier,
+ &sync_list);
}
dev->links.status = DL_DEV_DRIVER_BOUND;
device_links_write_unlock();
+
+ device_links_flush_sync_list(&sync_list);
}
static void device_link_drop_managed(struct device_link *link)
@@ -744,6 +995,7 @@ void device_links_driver_cleanup(struct device *dev)
WRITE_ONCE(link->status, DL_STATE_DORMANT);
}
+ list_del_init(&dev->links.defer_sync);
__device_links_no_driver(dev);
device_links_write_unlock();
@@ -813,7 +1065,8 @@ void device_links_unbind_consumers(struct device *dev)
list_for_each_entry(link, &dev->links.consumers, s_node) {
enum device_link_state status;
- if (!(link->flags & DL_FLAG_MANAGED))
+ if (!(link->flags & DL_FLAG_MANAGED) ||
+ link->flags & DL_FLAG_SYNC_STATE_ONLY)
continue;
status = link->status;
@@ -849,6 +1102,10 @@ static void device_links_purge(struct device *dev)
{
struct device_link *link, *ln;
+ mutex_lock(&wfs_lock);
+ list_del(&dev->links.needs_suppliers);
+ mutex_unlock(&wfs_lock);
+
/*
* Delete all of the remaining links from this device to any other
* devices (either consumers or suppliers).
@@ -1713,6 +1970,8 @@ void device_initialize(struct device *dev)
#endif
INIT_LIST_HEAD(&dev->links.consumers);
INIT_LIST_HEAD(&dev->links.suppliers);
+ INIT_LIST_HEAD(&dev->links.needs_suppliers);
+ INIT_LIST_HEAD(&dev->links.defer_sync);
dev->links.status = DL_DEV_NO_DRIVER;
}
EXPORT_SYMBOL_GPL(device_initialize);
@@ -2101,7 +2360,7 @@ int device_add(struct device *dev)
struct device *parent;
struct kobject *kobj;
struct class_interface *class_intf;
- int error = -EINVAL;
+ int error = -EINVAL, fw_ret;
struct kobject *glue_dir = NULL;
dev = get_device(dev);
@@ -2199,6 +2458,32 @@ int device_add(struct device *dev)
BUS_NOTIFY_ADD_DEVICE, dev);
kobject_uevent(&dev->kobj, KOBJ_ADD);
+
+ if (dev->fwnode && !dev->fwnode->dev)
+ dev->fwnode->dev = dev;
+
+ /*
+ * Check if any of the other devices (consumers) have been waiting for
+ * this device (supplier) to be added so that they can create a device
+ * link to it.
+ *
+ * This needs to happen after device_pm_add() because device_link_add()
+ * requires the supplier be registered before it's called.
+ *
+ * But this also needs to happe before bus_probe_device() to make sure
+ * waiting consumers can link to it before the driver is bound to the
+ * device and the driver sync_state callback is called for this device.
+ */
+ device_link_add_missing_supplier_links();
+
+ if (fwnode_has_op(dev->fwnode, add_links)) {
+ fw_ret = fwnode_call_int_op(dev->fwnode, add_links, dev);
+ if (fw_ret == -ENODEV)
+ device_link_wait_for_mandatory_supplier(dev);
+ else if (fw_ret)
+ device_link_wait_for_optional_supplier(dev);
+ }
+
bus_probe_device(dev);
if (parent)
klist_add_tail(&dev->p->knode_parent,
@@ -2343,6 +2628,9 @@ void device_del(struct device *dev)
kill_device(dev);
device_unlock(dev);
+ if (dev->fwnode && dev->fwnode->dev == dev)
+ dev->fwnode->dev = NULL;
+
/* Notify clients of device removal. This call must come
* before dpm_sysfs_remove().
*/
diff --git a/drivers/base/firmware_loader/Kconfig b/drivers/base/firmware_loader/Kconfig
index 3f9e274e2ed3..5b24f3959255 100644
--- a/drivers/base/firmware_loader/Kconfig
+++ b/drivers/base/firmware_loader/Kconfig
@@ -148,7 +148,7 @@ config FW_LOADER_USER_HELPER_FALLBACK
to be used for all firmware requests which explicitly do not disable a
a fallback mechanism. Firmware calls which do prohibit a fallback
mechanism is request_firmware_direct(). This option is kept for
- backward compatibility purposes given this precise mechanism can also
+ backward compatibility purposes given this precise mechanism can also
be enabled by setting the proc sysctl value to true:
/proc/sys/kernel/firmware_config/force_sysfs_fallback
@@ -169,5 +169,17 @@ config FW_LOADER_COMPRESS
be compressed with either none or crc32 integrity check type (pass
"-C crc32" option to xz command).
+config FW_CACHE
+ bool "Enable firmware caching during suspend"
+ depends on PM_SLEEP
+ default y if PM_SLEEP
+ help
+ Because firmware caching generates uevent messages that are sent
+ over a netlink socket, it can prevent suspend on many platforms.
+ It is also not always useful, so on such platforms we have the
+ option.
+
+ If unsure, say Y.
+
endif # FW_LOADER
endmenu
diff --git a/drivers/base/firmware_loader/builtin/Makefile b/drivers/base/firmware_loader/builtin/Makefile
index 37e5ae387400..4a66888e7253 100644
--- a/drivers/base/firmware_loader/builtin/Makefile
+++ b/drivers/base/firmware_loader/builtin/Makefile
@@ -8,7 +8,8 @@ fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
obj-y := $(addsuffix .gen.o, $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE)))
FWNAME = $(patsubst $(obj)/%.gen.S,%,$@)
-FWSTR = $(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME))))
+comma := ,
+FWSTR = $(subst $(comma),_,$(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME)))))
ASM_WORD = $(if $(CONFIG_64BIT),.quad,.long)
ASM_ALIGN = $(if $(CONFIG_64BIT),3,2)
PROGBITS = $(if $(CONFIG_ARM),%,@)progbits
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
index bf44c79beae9..249add8c5e05 100644
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -4,7 +4,7 @@
*
* Copyright (c) 2003 Manuel Estrada Sainz
*
- * Please see Documentation/firmware_class/ for more information.
+ * Please see Documentation/driver-api/firmware/ for more information.
*
*/
@@ -51,7 +51,7 @@ struct firmware_cache {
struct list_head head;
int state;
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_FW_CACHE
/*
* Names of firmware images which have been cached successfully
* will be added into the below list so that device uncache
@@ -504,6 +504,7 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv,
path);
continue;
}
+ dev_dbg(device, "Loading firmware from %s\n", path);
if (decompress) {
dev_dbg(device, "f/w decompressing %s\n",
fw_priv->fw_name);
@@ -556,7 +557,7 @@ static void fw_set_page_data(struct fw_priv *fw_priv, struct firmware *fw)
(unsigned int)fw_priv->size);
}
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_FW_CACHE
static void fw_name_devm_release(struct device *dev, void *res)
{
struct fw_name_devm *fwn = res;
@@ -1046,7 +1047,7 @@ request_firmware_nowait(
}
EXPORT_SYMBOL(request_firmware_nowait);
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_FW_CACHE
static ASYNC_DOMAIN_EXCLUSIVE(fw_cache_domain);
/**
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index b230beb6ccb4..7c532548b0a6 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -60,6 +60,7 @@ struct resource *platform_get_resource(struct platform_device *dev,
}
EXPORT_SYMBOL_GPL(platform_get_resource);
+#ifdef CONFIG_HAS_IOMEM
/**
* devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
* device
@@ -68,7 +69,6 @@ EXPORT_SYMBOL_GPL(platform_get_resource);
* resource management
* @index: resource index
*/
-#ifdef CONFIG_HAS_IOMEM
void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index)
{
@@ -78,9 +78,63 @@ void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
return devm_ioremap_resource(&pdev->dev, res);
}
EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);
+
+/**
+ * devm_platform_ioremap_resource_wc - write-combined variant of
+ * devm_platform_ioremap_resource()
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource management
+ * @index: resource index
+ */
+void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev,
+ unsigned int index)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, index);
+ return devm_ioremap_resource_wc(&pdev->dev, res);
+}
+
+/**
+ * devm_platform_ioremap_resource_byname - call devm_ioremap_resource for
+ * a platform device, retrieve the
+ * resource by name
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource management
+ * @name: name of the resource
+ */
+void __iomem *
+devm_platform_ioremap_resource_byname(struct platform_device *pdev,
+ const char *name)
+{
+ struct resource *res;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
+ return devm_ioremap_resource(&pdev->dev, res);
+}
+EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname);
#endif /* CONFIG_HAS_IOMEM */
-static int __platform_get_irq(struct platform_device *dev, unsigned int num)
+/**
+ * platform_get_irq_optional - get an optional IRQ for a device
+ * @dev: platform device
+ * @num: IRQ number index
+ *
+ * Gets an IRQ for a platform device. Device drivers should check the return
+ * value for errors so as to not pass a negative integer value to the
+ * request_irq() APIs. This is the same as platform_get_irq(), except that it
+ * does not print an error message if an IRQ can not be obtained.
+ *
+ * Example:
+ * int irq = platform_get_irq_optional(pdev, 0);
+ * if (irq < 0)
+ * return irq;
+ *
+ * Return: IRQ number on success, negative error number on failure.
+ */
+int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
{
#ifdef CONFIG_SPARC
/* sparc does not have irqs represented as IORESOURCE_IRQ resources */
@@ -89,9 +143,9 @@ static int __platform_get_irq(struct platform_device *dev, unsigned int num)
return dev->archdata.irqs[num];
#else
struct resource *r;
- if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
- int ret;
+ int ret;
+ if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
ret = of_irq_get(dev->dev.of_node, num);
if (ret > 0 || ret == -EPROBE_DEFER)
return ret;
@@ -100,8 +154,6 @@ static int __platform_get_irq(struct platform_device *dev, unsigned int num)
r = platform_get_resource(dev, IORESOURCE_IRQ, num);
if (has_acpi_companion(&dev->dev)) {
if (r && r->flags & IORESOURCE_DISABLED) {
- int ret;
-
ret = acpi_irq_get(ACPI_HANDLE(&dev->dev), num, r);
if (ret)
return ret;
@@ -134,8 +186,7 @@ static int __platform_get_irq(struct platform_device *dev, unsigned int num)
* allows a common code path across either kind of resource.
*/
if (num == 0 && has_acpi_companion(&dev->dev)) {
- int ret = acpi_dev_gpio_irq_get(ACPI_COMPANION(&dev->dev), num);
-
+ ret = acpi_dev_gpio_irq_get(ACPI_COMPANION(&dev->dev), num);
/* Our callers expect -ENXIO for missing IRQs. */
if (ret >= 0 || ret == -EPROBE_DEFER)
return ret;
@@ -144,6 +195,7 @@ static int __platform_get_irq(struct platform_device *dev, unsigned int num)
return -ENXIO;
#endif
}
+EXPORT_SYMBOL_GPL(platform_get_irq_optional);
/**
* platform_get_irq - get an IRQ for a device
@@ -165,7 +217,7 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
{
int ret;
- ret = __platform_get_irq(dev, num);
+ ret = platform_get_irq_optional(dev, num);
if (ret < 0 && ret != -EPROBE_DEFER)
dev_err(&dev->dev, "IRQ index %u not found\n", num);
@@ -173,29 +225,6 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
}
EXPORT_SYMBOL_GPL(platform_get_irq);
-/**
- * platform_get_irq_optional - get an optional IRQ for a device
- * @dev: platform device
- * @num: IRQ number index
- *
- * Gets an IRQ for a platform device. Device drivers should check the return
- * value for errors so as to not pass a negative integer value to the
- * request_irq() APIs. This is the same as platform_get_irq(), except that it
- * does not print an error message if an IRQ can not be obtained.
- *
- * Example:
- * int irq = platform_get_irq_optional(pdev, 0);
- * if (irq < 0)
- * return irq;
- *
- * Return: IRQ number on success, negative error number on failure.
- */
-int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
-{
- return __platform_get_irq(dev, num);
-}
-EXPORT_SYMBOL_GPL(platform_get_irq_optional);
-
/**
* platform_irq_count - Count the number of IRQs a platform device uses
* @dev: platform device
@@ -206,7 +235,7 @@ int platform_irq_count(struct platform_device *dev)
{
int ret, nr = 0;
- while ((ret = __platform_get_irq(dev, nr)) >= 0)
+ while ((ret = platform_get_irq_optional(dev, nr)) >= 0)
nr++;
if (ret == -EPROBE_DEFER)
@@ -245,10 +274,9 @@ static int __platform_get_irq_byname(struct platform_device *dev,
const char *name)
{
struct resource *r;
+ int ret;
if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
- int ret;
-
ret = of_irq_get_byname(dev->dev.of_node, name);
if (ret > 0 || ret == -EPROBE_DEFER)
return ret;
@@ -1278,6 +1306,11 @@ struct bus_type platform_bus_type = {
};
EXPORT_SYMBOL_GPL(platform_bus_type);
+static inline int __platform_match(struct device *dev, const void *drv)
+{
+ return platform_match(dev, (struct device_driver *)drv);
+}
+
/**
* platform_find_device_by_driver - Find a platform device with a given
* driver.
@@ -1288,7 +1321,7 @@ struct device *platform_find_device_by_driver(struct device *start,
const struct device_driver *drv)
{
return bus_find_device(&platform_bus_type, start, drv,
- (void *)platform_match);
+ __platform_match);
}
EXPORT_SYMBOL_GPL(platform_find_device_by_driver);
@@ -1296,8 +1329,6 @@ int __init platform_bus_init(void)
{
int error;
- early_platform_cleanup();
-
error = device_register(&platform_bus);
if (error) {
put_device(&platform_bus);
@@ -1309,289 +1340,3 @@ int __init platform_bus_init(void)
of_platform_register_reconfig_notifier();
return error;
}
-
-static __initdata LIST_HEAD(early_platform_driver_list);
-static __initdata LIST_HEAD(early_platform_device_list);
-
-/**
- * early_platform_driver_register - register early platform driver
- * @epdrv: early_platform driver structure
- * @buf: string passed from early_param()
- *
- * Helper function for early_platform_init() / early_platform_init_buffer()
- */
-int __init early_platform_driver_register(struct early_platform_driver *epdrv,
- char *buf)
-{
- char *tmp;
- int n;
-
- /* Simply add the driver to the end of the global list.
- * Drivers will by default be put on the list in compiled-in order.
- */
- if (!epdrv->list.next) {
- INIT_LIST_HEAD(&epdrv->list);
- list_add_tail(&epdrv->list, &early_platform_driver_list);
- }
-
- /* If the user has specified device then make sure the driver
- * gets prioritized. The driver of the last device specified on
- * command line will be put first on the list.
- */
- n = strlen(epdrv->pdrv->driver.name);
- if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) {
- list_move(&epdrv->list, &early_platform_driver_list);
-
- /* Allow passing parameters after device name */
- if (buf[n] == '\0' || buf[n] == ',')
- epdrv->requested_id = -1;
- else {
- epdrv->requested_id = simple_strtoul(&buf[n + 1],
- &tmp, 10);
-
- if (buf[n] != '.' || (tmp == &buf[n + 1])) {
- epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
- n = 0;
- } else
- n += strcspn(&buf[n + 1], ",") + 1;
- }
-
- if (buf[n] == ',')
- n++;
-
- if (epdrv->bufsize) {
- memcpy(epdrv->buffer, &buf[n],
- min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1));
- epdrv->buffer[epdrv->bufsize - 1] = '\0';
- }
- }
-
- return 0;
-}
-
-/**
- * early_platform_add_devices - adds a number of early platform devices
- * @devs: array of early platform devices to add
- * @num: number of early platform devices in array
- *
- * Used by early architecture code to register early platform devices and
- * their platform data.
- */
-void __init early_platform_add_devices(struct platform_device **devs, int num)
-{
- struct device *dev;
- int i;
-
- /* simply add the devices to list */
- for (i = 0; i < num; i++) {
- dev = &devs[i]->dev;
-
- if (!dev->devres_head.next) {
- pm_runtime_early_init(dev);
- INIT_LIST_HEAD(&dev->devres_head);
- list_add_tail(&dev->devres_head,
- &early_platform_device_list);
- }
- }
-}
-
-/**
- * early_platform_driver_register_all - register early platform drivers
- * @class_str: string to identify early platform driver class
- *
- * Used by architecture code to register all early platform drivers
- * for a certain class. If omitted then only early platform drivers
- * with matching kernel command line class parameters will be registered.
- */
-void __init early_platform_driver_register_all(char *class_str)
-{
- /* The "class_str" parameter may or may not be present on the kernel
- * command line. If it is present then there may be more than one
- * matching parameter.
- *
- * Since we register our early platform drivers using early_param()
- * we need to make sure that they also get registered in the case
- * when the parameter is missing from the kernel command line.
- *
- * We use parse_early_options() to make sure the early_param() gets
- * called at least once. The early_param() may be called more than
- * once since the name of the preferred device may be specified on
- * the kernel command line. early_platform_driver_register() handles
- * this case for us.
- */
- parse_early_options(class_str);
-}
-
-/**
- * early_platform_match - find early platform device matching driver
- * @epdrv: early platform driver structure
- * @id: id to match against
- */
-static struct platform_device * __init
-early_platform_match(struct early_platform_driver *epdrv, int id)
-{
- struct platform_device *pd;
-
- list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
- if (platform_match(&pd->dev, &epdrv->pdrv->driver))
- if (pd->id == id)
- return pd;
-
- return NULL;
-}
-
-/**
- * early_platform_left - check if early platform driver has matching devices
- * @epdrv: early platform driver structure
- * @id: return true if id or above exists
- */
-static int __init early_platform_left(struct early_platform_driver *epdrv,
- int id)
-{
- struct platform_device *pd;
-
- list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
- if (platform_match(&pd->dev, &epdrv->pdrv->driver))
- if (pd->id >= id)
- return 1;
-
- return 0;
-}
-
-/**
- * early_platform_driver_probe_id - probe drivers matching class_str and id
- * @class_str: string to identify early platform driver class
- * @id: id to match against
- * @nr_probe: number of platform devices to successfully probe before exiting
- */
-static int __init early_platform_driver_probe_id(char *class_str,
- int id,
- int nr_probe)
-{
- struct early_platform_driver *epdrv;
- struct platform_device *match;
- int match_id;
- int n = 0;
- int left = 0;
-
- list_for_each_entry(epdrv, &early_platform_driver_list, list) {
- /* only use drivers matching our class_str */
- if (strcmp(class_str, epdrv->class_str))
- continue;
-
- if (id == -2) {
- match_id = epdrv->requested_id;
- left = 1;
-
- } else {
- match_id = id;
- left += early_platform_left(epdrv, id);
-
- /* skip requested id */
- switch (epdrv->requested_id) {
- case EARLY_PLATFORM_ID_ERROR:
- case EARLY_PLATFORM_ID_UNSET:
- break;
- default:
- if (epdrv->requested_id == id)
- match_id = EARLY_PLATFORM_ID_UNSET;
- }
- }
-
- switch (match_id) {
- case EARLY_PLATFORM_ID_ERROR:
- pr_warn("%s: unable to parse %s parameter\n",
- class_str, epdrv->pdrv->driver.name);
- /* fall-through */
- case EARLY_PLATFORM_ID_UNSET:
- match = NULL;
- break;
- default:
- match = early_platform_match(epdrv, match_id);
- }
-
- if (match) {
- /*
- * Set up a sensible init_name to enable
- * dev_name() and others to be used before the
- * rest of the driver core is initialized.
- */
- if (!match->dev.init_name && slab_is_available()) {
- if (match->id != -1)
- match->dev.init_name =
- kasprintf(GFP_KERNEL, "%s.%d",
- match->name,
- match->id);
- else
- match->dev.init_name =
- kasprintf(GFP_KERNEL, "%s",
- match->name);
-
- if (!match->dev.init_name)
- return -ENOMEM;
- }
-
- if (epdrv->pdrv->probe(match))
- pr_warn("%s: unable to probe %s early.\n",
- class_str, match->name);
- else
- n++;
- }
-
- if (n >= nr_probe)
- break;
- }
-
- if (left)
- return n;
- else
- return -ENODEV;
-}
-
-/**
- * early_platform_driver_probe - probe a class of registered drivers
- * @class_str: string to identify early platform driver class
- * @nr_probe: number of platform devices to successfully probe before exiting
- * @user_only: only probe user specified early platform devices
- *
- * Used by architecture code to probe registered early platform drivers
- * within a certain class. For probe to happen a registered early platform
- * device matching a registered early platform driver is needed.
- */
-int __init early_platform_driver_probe(char *class_str,
- int nr_probe,
- int user_only)
-{
- int k, n, i;
-
- n = 0;
- for (i = -2; n < nr_probe; i++) {
- k = early_platform_driver_probe_id(class_str, i, nr_probe - n);
-
- if (k < 0)
- break;
-
- n += k;
-
- if (user_only)
- break;
- }
-
- return n;
-}
-
-/**
- * early_platform_cleanup - clean up early platform code
- */
-void __init early_platform_cleanup(void)
-{
- struct platform_device *pd, *pd2;
-
- /* clean up the devres list used to chain devices */
- list_for_each_entry_safe(pd, pd2, &early_platform_device_list,
- dev.devres_head) {
- list_del(&pd->dev.devres_head);
- memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head));
- }
-}
-
diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index 7c0c5ca5953d..4af11a423475 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -104,15 +104,12 @@ static const struct attribute_group soc_attr_group = {
.is_visible = soc_attribute_mode,
};
-static const struct attribute_group *soc_attr_groups[] = {
- &soc_attr_group,
- NULL,
-};
-
static void soc_release(struct device *dev)
{
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
+ ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
+ kfree(soc_dev->dev.groups);
kfree(soc_dev);
}
@@ -121,6 +118,7 @@ static struct soc_device_attribute *early_soc_dev_attr;
struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr)
{
struct soc_device *soc_dev;
+ const struct attribute_group **soc_attr_groups;
int ret;
if (!soc_bus_type.p) {
@@ -136,10 +134,18 @@ struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr
goto out1;
}
+ soc_attr_groups = kcalloc(3, sizeof(*soc_attr_groups), GFP_KERNEL);
+ if (!soc_attr_groups) {
+ ret = -ENOMEM;
+ goto out2;
+ }
+ soc_attr_groups[0] = &soc_attr_group;
+ soc_attr_groups[1] = soc_dev_attr->custom_attr_group;
+
/* Fetch a unique (reclaimable) SOC ID. */
ret = ida_simple_get(&soc_ida, 0, 0, GFP_KERNEL);
if (ret < 0)
- goto out2;
+ goto out3;
soc_dev->soc_dev_num = ret;
soc_dev->attr = soc_dev_attr;
@@ -150,15 +156,15 @@ struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr
dev_set_name(&soc_dev->dev, "soc%d", soc_dev->soc_dev_num);
ret = device_register(&soc_dev->dev);
- if (ret)
- goto out3;
+ if (ret) {
+ put_device(&soc_dev->dev);
+ return ERR_PTR(ret);
+ }
return soc_dev;
out3:
- ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
- put_device(&soc_dev->dev);
- soc_dev = NULL;
+ kfree(soc_attr_groups);
out2:
kfree(soc_dev);
out1:
@@ -169,8 +175,6 @@ EXPORT_SYMBOL_GPL(soc_device_register);
/* Ensure soc_dev->attr is freed prior to calling soc_device_unregister. */
void soc_device_unregister(struct soc_device *soc_dev)
{
- ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
-
device_unregister(&soc_dev->dev);
early_soc_dev_attr = NULL;
}
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index ef773db080e9..9cde50cb3220 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -25,6 +25,10 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
+#ifdef CONFIG_SUPERH
+#include <asm/platform_early.h>
+#endif
+
struct sh_cmt_device;
/*
@@ -1052,7 +1056,7 @@ static int sh_cmt_probe(struct platform_device *pdev)
struct sh_cmt_device *cmt = platform_get_drvdata(pdev);
int ret;
- if (!is_early_platform_device(pdev)) {
+ if (!is_sh_early_platform_device(pdev)) {
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
}
@@ -1072,7 +1076,7 @@ static int sh_cmt_probe(struct platform_device *pdev)
pm_runtime_idle(&pdev->dev);
return ret;
}
- if (is_early_platform_device(pdev))
+ if (is_sh_early_platform_device(pdev))
return 0;
out:
@@ -1109,7 +1113,10 @@ static void __exit sh_cmt_exit(void)
platform_driver_unregister(&sh_cmt_device_driver);
}
-early_platform_init("earlytimer", &sh_cmt_device_driver);
+#ifdef CONFIG_SUPERH
+sh_early_platform_init("earlytimer", &sh_cmt_device_driver);
+#endif
+
subsys_initcall(sh_cmt_init);
module_exit(sh_cmt_exit);
diff --git a/drivers/clocksource/sh_mtu2.c b/drivers/clocksource/sh_mtu2.c
index 62812f80b5cc..64526e50d471 100644
--- a/drivers/clocksource/sh_mtu2.c
+++ b/drivers/clocksource/sh_mtu2.c
@@ -23,6 +23,10 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
+#ifdef CONFIG_SUPERH
+#include <asm/platform_early.h>
+#endif
+
struct sh_mtu2_device;
struct sh_mtu2_channel {
@@ -448,7 +452,7 @@ static int sh_mtu2_probe(struct platform_device *pdev)
struct sh_mtu2_device *mtu = platform_get_drvdata(pdev);
int ret;
- if (!is_early_platform_device(pdev)) {
+ if (!is_sh_early_platform_device(pdev)) {
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
}
@@ -468,7 +472,7 @@ static int sh_mtu2_probe(struct platform_device *pdev)
pm_runtime_idle(&pdev->dev);
return ret;
}
- if (is_early_platform_device(pdev))
+ if (is_sh_early_platform_device(pdev))
return 0;
out:
@@ -517,7 +521,10 @@ static void __exit sh_mtu2_exit(void)
platform_driver_unregister(&sh_mtu2_device_driver);
}
-early_platform_init("earlytimer", &sh_mtu2_device_driver);
+#ifdef CONFIG_SUPERH
+sh_early_platform_init("earlytimer", &sh_mtu2_device_driver);
+#endif
+
subsys_initcall(sh_mtu2_init);
module_exit(sh_mtu2_exit);
diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index 8c4f3753b36e..d49690d15536 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -24,6 +24,10 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
+#ifdef CONFIG_SUPERH
+#include <asm/platform_early.h>
+#endif
+
enum sh_tmu_model {
SH_TMU,
SH_TMU_SH3,
@@ -595,7 +599,7 @@ static int sh_tmu_probe(struct platform_device *pdev)
struct sh_tmu_device *tmu = platform_get_drvdata(pdev);
int ret;
- if (!is_early_platform_device(pdev)) {
+ if (!is_sh_early_platform_device(pdev)) {
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
}
@@ -615,7 +619,8 @@ static int sh_tmu_probe(struct platform_device *pdev)
pm_runtime_idle(&pdev->dev);
return ret;
}
- if (is_early_platform_device(pdev))
+
+ if (is_sh_early_platform_device(pdev))
return 0;
out:
@@ -665,7 +670,10 @@ static void __exit sh_tmu_exit(void)
platform_driver_unregister(&sh_tmu_device_driver);
}
-early_platform_init("earlytimer", &sh_tmu_device_driver);
+#ifdef CONFIG_SUPERH
+sh_early_platform_init("earlytimer", &sh_tmu_device_driver);
+#endif
+
subsys_initcall(sh_tmu_init);
module_exit(sh_tmu_exit);
diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 6c0687694341..2f0f50336b9a 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -773,23 +773,12 @@ static int mvebu_pwm_probe(struct platform_device *pdev,
{
struct device *dev = &pdev->dev;
struct mvebu_pwm *mvpwm;
- struct resource *res;
u32 set;
if (!of_device_is_compatible(mvchip->chip.of_node,
"marvell,armada-370-gpio"))
return 0;
- /*
- * There are only two sets of PWM configuration registers for
- * all the GPIO lines on those SoCs which this driver reserves
- * for the first two GPIO chips. So if the resource is missing
- * we can't treat it as an error.
- */
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwm");
- if (!res)
- return 0;
-
if (IS_ERR(mvchip->clk))
return PTR_ERR(mvchip->clk);
@@ -812,7 +801,13 @@ static int mvebu_pwm_probe(struct platform_device *pdev,
mvchip->mvpwm = mvpwm;
mvpwm->mvchip = mvchip;
- mvpwm->membase = devm_ioremap_resource(dev, res);
+ /*
+ * There are only two sets of PWM configuration registers for
+ * all the GPIO lines on those SoCs which this driver reserves
+ * for the first two GPIO chips. So if the resource is missing
+ * we can't treat it as an error.
+ */
+ mvpwm->membase = devm_platform_ioremap_resource_byname(pdev, "pwm");
if (IS_ERR(mvpwm->membase))
return PTR_ERR(mvpwm->membase);
diff --git a/drivers/gpio/gpio-tegra186.c b/drivers/gpio/gpio-tegra186.c
index a9058fda187e..ef40fbe923cf 100644
--- a/drivers/gpio/gpio-tegra186.c
+++ b/drivers/gpio/gpio-tegra186.c
@@ -407,7 +407,6 @@ static int tegra186_gpio_probe(struct platform_device *pdev)
unsigned int i, j, offset;
struct gpio_irq_chip *irq;
struct tegra_gpio *gpio;
- struct resource *res;
char **names;
int err;
@@ -417,8 +416,7 @@ static int tegra186_gpio_probe(struct platform_device *pdev)
gpio->soc = of_device_get_match_data(&pdev->dev);
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gpio");
- gpio->base = devm_ioremap_resource(&pdev->dev, res);
+ gpio->base = devm_platform_ioremap_resource_byname(pdev, "gpio");
if (IS_ERR(gpio->base))
return PTR_ERR(gpio->base);
diff --git a/drivers/i2c/i2c-core-of.c b/drivers/i2c/i2c-core-of.c
index 7eb41990bd6d..e4d296b40baa 100644
--- a/drivers/i2c/i2c-core-of.c
+++ b/drivers/i2c/i2c-core-of.c
@@ -50,6 +50,7 @@ int of_i2c_get_board_info(struct device *dev, struct device_node *node,
info->addr = addr;
info->of_node = node;
+ info->fwnode = of_fwnode_handle(node);
if (of_property_read_bool(node, "host-notify"))
info->flags |= I2C_CLIENT_HOST_NOTIFY;
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 97b26e9a5234..51100350b688 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -5701,11 +5701,10 @@ static int mlx5_ib_rn_get_params(struct ib_device *device, u8 port_num,
static void delay_drop_debugfs_cleanup(struct mlx5_ib_dev *dev)
{
- if (!dev->delay_drop.dbg)
+ if (!dev->delay_drop.dir_debugfs)
return;
- debugfs_remove_recursive(dev->delay_drop.dbg->dir_debugfs);
- kfree(dev->delay_drop.dbg);
- dev->delay_drop.dbg = NULL;
+ debugfs_remove_recursive(dev->delay_drop.dir_debugfs);
+ dev->delay_drop.dir_debugfs = NULL;
}
static void cancel_delay_drop(struct mlx5_ib_dev *dev)
@@ -5756,52 +5755,22 @@ static const struct file_operations fops_delay_drop_timeout = {
.read = delay_drop_timeout_read,
};
-static int delay_drop_debugfs_init(struct mlx5_ib_dev *dev)
+static void delay_drop_debugfs_init(struct mlx5_ib_dev *dev)
{
- struct mlx5_ib_dbg_delay_drop *dbg;
+ struct dentry *root;
if (!mlx5_debugfs_root)
- return 0;
+ return;
- dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
- if (!dbg)
- return -ENOMEM;
+ root = debugfs_create_dir("delay_drop", dev->mdev->priv.dbg_root);
+ dev->delay_drop.dir_debugfs = root;
- dev->delay_drop.dbg = dbg;
-
- dbg->dir_debugfs =
- debugfs_create_dir("delay_drop",
- dev->mdev->priv.dbg_root);
- if (!dbg->dir_debugfs)
- goto out_debugfs;
-
- dbg->events_cnt_debugfs =
- debugfs_create_atomic_t("num_timeout_events", 0400,
- dbg->dir_debugfs,
- &dev->delay_drop.events_cnt);
- if (!dbg->events_cnt_debugfs)
- goto out_debugfs;
-
- dbg->rqs_cnt_debugfs =
- debugfs_create_atomic_t("num_rqs", 0400,
- dbg->dir_debugfs,
- &dev->delay_drop.rqs_cnt);
- if (!dbg->rqs_cnt_debugfs)
- goto out_debugfs;
-
- dbg->timeout_debugfs =
- debugfs_create_file("timeout", 0600,
- dbg->dir_debugfs,
- &dev->delay_drop,
- &fops_delay_drop_timeout);
- if (!dbg->timeout_debugfs)
- goto out_debugfs;
-
- return 0;
-
-out_debugfs:
- delay_drop_debugfs_cleanup(dev);
- return -ENOMEM;
+ debugfs_create_atomic_t("num_timeout_events", 0400, root,
+ &dev->delay_drop.events_cnt);
+ debugfs_create_atomic_t("num_rqs", 0400, root,
+ &dev->delay_drop.rqs_cnt);
+ debugfs_create_file("timeout", 0600, root, &dev->delay_drop,
+ &fops_delay_drop_timeout);
}
static void init_delay_drop(struct mlx5_ib_dev *dev)
@@ -5817,8 +5786,7 @@ static void init_delay_drop(struct mlx5_ib_dev *dev)
atomic_set(&dev->delay_drop.rqs_cnt, 0);
atomic_set(&dev->delay_drop.events_cnt, 0);
- if (delay_drop_debugfs_init(dev))
- mlx5_ib_warn(dev, "Failed to init delay drop debugfs\n");
+ delay_drop_debugfs_init(dev);
}
static void mlx5_ib_unbind_slave_port(struct mlx5_ib_dev *ibdev,
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index b983e385a8c5..03af54b53bf7 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -799,13 +799,6 @@ enum {
MLX5_MAX_DELAY_DROP_TIMEOUT_MS = 100,
};
-struct mlx5_ib_dbg_delay_drop {
- struct dentry *dir_debugfs;
- struct dentry *rqs_cnt_debugfs;
- struct dentry *events_cnt_debugfs;
- struct dentry *timeout_debugfs;
-};
-
struct mlx5_ib_delay_drop {
struct mlx5_ib_dev *dev;
struct work_struct delay_drop_work;
@@ -815,7 +808,7 @@ struct mlx5_ib_delay_drop {
bool activate;
atomic_t events_cnt;
atomic_t rqs_cnt;
- struct mlx5_ib_dbg_delay_drop *dbg;
+ struct dentry *dir_debugfs;
};
enum mlx5_ib_stages {
diff --git a/drivers/mailbox/tegra-hsp.c b/drivers/mailbox/tegra-hsp.c
index 4c5ba35d48d4..834b35dc3b13 100644
--- a/drivers/mailbox/tegra-hsp.c
+++ b/drivers/mailbox/tegra-hsp.c
@@ -657,7 +657,7 @@ static int tegra_hsp_probe(struct platform_device *pdev)
hsp->num_db = (value >> HSP_nDB_SHIFT) & HSP_nINT_MASK;
hsp->num_si = (value >> HSP_nSI_SHIFT) & HSP_nINT_MASK;
- err = platform_get_irq_byname(pdev, "doorbell");
+ err = platform_get_irq_byname_optional(pdev, "doorbell");
if (err >= 0)
hsp->doorbell_irq = err;
@@ -677,7 +677,7 @@ static int tegra_hsp_probe(struct platform_device *pdev)
if (!name)
return -ENOMEM;
- err = platform_get_irq_byname(pdev, name);
+ err = platform_get_irq_byname_optional(pdev, name);
if (err >= 0) {
hsp->shared_irqs[i] = err;
count++;
diff --git a/drivers/media/platform/sti/c8sectpfe/c8sectpfe-debugfs.c b/drivers/media/platform/sti/c8sectpfe/c8sectpfe-debugfs.c
index 8f0ddcbeed9d..301fa10f419b 100644
--- a/drivers/media/platform/sti/c8sectpfe/c8sectpfe-debugfs.c
+++ b/drivers/media/platform/sti/c8sectpfe/c8sectpfe-debugfs.c
@@ -225,36 +225,16 @@ static const struct debugfs_reg32 fei_sys_regs[] = {
void c8sectpfe_debugfs_init(struct c8sectpfei *fei)
{
- struct dentry *root;
- struct dentry *file;
-
- root = debugfs_create_dir("c8sectpfe", NULL);
- if (!root)
- goto err;
-
- fei->root = root;
-
fei->regset = devm_kzalloc(fei->dev, sizeof(*fei->regset), GFP_KERNEL);
if (!fei->regset)
- goto err;
+ return;
fei->regset->regs = fei_sys_regs;
fei->regset->nregs = ARRAY_SIZE(fei_sys_regs);
fei->regset->base = fei->io;
- file = debugfs_create_regset32("registers", S_IRUGO, root,
- fei->regset);
- if (!file) {
- dev_err(fei->dev,
- "%s not able to create 'registers' debugfs\n"
- , __func__);
- goto err;
- }
-
- return;
-
-err:
- debugfs_remove_recursive(root);
+ fei->root = debugfs_create_dir("c8sectpfe", NULL);
+ debugfs_create_regset32("registers", S_IRUGO, fei->root, fei->regset);
}
void c8sectpfe_debugfs_exit(struct c8sectpfei *fei)
diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c
index f30448bf3a63..6c1a23cb3e8c 100644
--- a/drivers/misc/sram.c
+++ b/drivers/misc/sram.c
@@ -340,8 +340,6 @@ static const struct of_device_id sram_dt_ids[] = {
static int sram_probe(struct platform_device *pdev)
{
struct sram_dev *sram;
- struct resource *res;
- size_t size;
int ret;
int (*init_func)(void);
@@ -351,25 +349,14 @@ static int sram_probe(struct platform_device *pdev)
sram->dev = &pdev->dev;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(sram->dev, "found no memory resource\n");
- return -EINVAL;
- }
-
- size = resource_size(res);
-
- if (!devm_request_mem_region(sram->dev, res->start, size, pdev->name)) {
- dev_err(sram->dev, "could not request region for resource\n");
- return -EBUSY;
- }
-
if (of_property_read_bool(pdev->dev.of_node, "no-memory-wc"))
- sram->virt_base = devm_ioremap(sram->dev, res->start, size);
+ sram->virt_base = devm_platform_ioremap_resource(pdev, 0);
else
- sram->virt_base = devm_ioremap_wc(sram->dev, res->start, size);
- if (!sram->virt_base)
- return -ENOMEM;
+ sram->virt_base = devm_platform_ioremap_resource_wc(pdev, 0);
+ if (IS_ERR(sram->virt_base)) {
+ dev_err(&pdev->dev, "could not map SRAM registers\n");
+ return PTR_ERR(sram->virt_base);
+ }
sram->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),
NUMA_NO_NODE, NULL);
@@ -382,7 +369,8 @@ static int sram_probe(struct platform_device *pdev)
else
clk_prepare_enable(sram->clk);
- ret = sram_reserve_regions(sram, res);
+ ret = sram_reserve_regions(sram,
+ platform_get_resource(pdev, IORESOURCE_MEM, 0));
if (ret)
goto err_disable_clk;
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 581b99f9e113..6f065bb5c55a 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -583,11 +583,11 @@ static void atmci_init_debugfs(struct atmel_mci_slot *slot)
debugfs_create_file("regs", S_IRUSR, root, host, &atmci_regs_fops);
debugfs_create_file("req", S_IRUSR, root, slot, &atmci_req_fops);
- debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state);
- debugfs_create_x32("pending_events", S_IRUSR, root,
- (u32 *)&host->pending_events);
- debugfs_create_x32("completed_events", S_IRUSR, root,
- (u32 *)&host->completed_events);
+ debugfs_create_u32("state", S_IRUSR, root, &host->state);
+ debugfs_create_xul("pending_events", S_IRUSR, root,
+ &host->pending_events);
+ debugfs_create_xul("completed_events", S_IRUSR, root,
+ &host->completed_events);
}
#if defined(CONFIG_OF)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index bf0048ebbda3..fc9d4d000f97 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -176,11 +176,11 @@ static void dw_mci_init_debugfs(struct dw_mci_slot *slot)
debugfs_create_file("regs", S_IRUSR, root, host, &dw_mci_regs_fops);
debugfs_create_file("req", S_IRUSR, root, slot, &dw_mci_req_fops);
- debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state);
- debugfs_create_x32("pending_events", S_IRUSR, root,
- (u32 *)&host->pending_events);
- debugfs_create_x32("completed_events", S_IRUSR, root,
- (u32 *)&host->completed_events);
+ debugfs_create_u32("state", S_IRUSR, root, &host->state);
+ debugfs_create_xul("pending_events", S_IRUSR, root,
+ &host->pending_events);
+ debugfs_create_xul("completed_events", S_IRUSR, root,
+ &host->completed_events);
}
#endif /* defined(CONFIG_DEBUG_FS) */
diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c
index 40b079162804..bd40b114d6cd 100644
--- a/drivers/net/caif/caif_serial.c
+++ b/drivers/net/caif/caif_serial.c
@@ -102,8 +102,8 @@ static inline void debugfs_init(struct ser_device *ser, struct tty_struct *tty)
debugfs_create_blob("last_rx_msg", 0400, ser->debugfs_tty_dir,
&ser->rx_blob);
- debugfs_create_x32("ser_state", 0400, ser->debugfs_tty_dir,
- (u32 *)&ser->state);
+ debugfs_create_xul("ser_state", 0400, ser->debugfs_tty_dir,
+ &ser->state);
debugfs_create_x8("tty_status", 0400, ser->debugfs_tty_dir,
&ser->tty_status);
diff --git a/drivers/ntb/test/ntb_pingpong.c b/drivers/ntb/test/ntb_pingpong.c
index 65865e460ab8..04dd46647db3 100644
--- a/drivers/ntb/test/ntb_pingpong.c
+++ b/drivers/ntb/test/ntb_pingpong.c
@@ -354,13 +354,10 @@ static void pp_clear_ctx(struct pp_ctx *pp)
static void pp_setup_dbgfs(struct pp_ctx *pp)
{
struct pci_dev *pdev = pp->ntb->pdev;
- void *ret;
pp->dbgfs_dir = debugfs_create_dir(pci_name(pdev), pp_dbgfs_topdir);
- ret = debugfs_create_atomic_t("count", 0600, pp->dbgfs_dir, &pp->count);
- if (!ret)
- dev_warn(&pp->ntb->dev, "DebugFS unsupported\n");
+ debugfs_create_atomic_t("count", 0600, pp->dbgfs_dir, &pp->count);
}
static void pp_clear_dbgfs(struct pp_ctx *pp)
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index b47a2292fe8e..d93891a05f60 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -480,6 +480,7 @@ int of_platform_populate(struct device_node *root,
pr_debug("%s()\n", __func__);
pr_debug(" starting at: %pOF\n", root);
+ device_links_supplier_sync_state_pause();
for_each_child_of_node(root, child) {
rc = of_platform_bus_create(child, matches, lookup, parent, true);
if (rc) {
@@ -487,6 +488,8 @@ int of_platform_populate(struct device_node *root,
break;
}
}
+ device_links_supplier_sync_state_resume();
+
of_node_set_flag(root, OF_POPULATED_BUS);
of_node_put(root);
@@ -518,6 +521,7 @@ static int __init of_platform_default_populate_init(void)
if (!of_have_populated_dt())
return -ENODEV;
+ device_links_supplier_sync_state_pause();
/*
* Handle certain compatibles explicitly, since we don't want to create
* platform_devices for every node in /reserved-memory with a
@@ -538,6 +542,14 @@ static int __init of_platform_default_populate_init(void)
return 0;
}
arch_initcall_sync(of_platform_default_populate_init);
+
+static int __init of_platform_sync_state_init(void)
+{
+ if (of_have_populated_dt())
+ device_links_supplier_sync_state_resume();
+ return 0;
+}
+late_initcall_sync(of_platform_sync_state_init);
#endif
int of_platform_device_destroy(struct device *dev, void *data)
diff --git a/drivers/of/property.c b/drivers/of/property.c
index e8202f61a5d9..477966d2421a 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -25,6 +25,7 @@
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/string.h>
+#include <linux/moduleparam.h>
#include "of_private.h"
@@ -999,6 +1000,320 @@ of_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
return of_device_get_match_data(dev);
}
+static bool of_is_ancestor_of(struct device_node *test_ancestor,
+ struct device_node *child)
+{
+ of_node_get(child);
+ while (child) {
+ if (child == test_ancestor) {
+ of_node_put(child);
+ return true;
+ }
+ child = of_get_next_parent(child);
+ }
+ return false;
+}
+
+/**
+ * of_link_to_phandle - Add device link to supplier from supplier phandle
+ * @dev: consumer device
+ * @sup_np: phandle to supplier device tree node
+ *
+ * Given a phandle to a supplier device tree node (@sup_np), this function
+ * finds the device that owns the supplier device tree node and creates a
+ * device link from @dev consumer device to the supplier device. This function
+ * doesn't create device links for invalid scenarios such as trying to create a
+ * link with a parent device as the consumer of its child device. In such
+ * cases, it returns an error.
+ *
+ * Returns:
+ * - 0 if link successfully created to supplier
+ * - -EAGAIN if linking to the supplier should be reattempted
+ * - -EINVAL if the supplier link is invalid and should not be created
+ * - -ENODEV if there is no device that corresponds to the supplier phandle
+ */
+static int of_link_to_phandle(struct device *dev, struct device_node *sup_np,
+ u32 dl_flags)
+{
+ struct device *sup_dev;
+ int ret = 0;
+ struct device_node *tmp_np = sup_np;
+ int is_populated;
+
+ of_node_get(sup_np);
+ /*
+ * Find the device node that contains the supplier phandle. It may be
+ * @sup_np or it may be an ancestor of @sup_np.
+ */
+ while (sup_np && !of_find_property(sup_np, "compatible", NULL))
+ sup_np = of_get_next_parent(sup_np);
+ if (!sup_np) {
+ dev_dbg(dev, "Not linking to %pOFP - No device\n", tmp_np);
+ return -ENODEV;
+ }
+
+ /*
+ * Don't allow linking a device node as a consumer of one of its
+ * descendant nodes. By definition, a child node can't be a functional
+ * dependency for the parent node.
+ */
+ if (of_is_ancestor_of(dev->of_node, sup_np)) {
+ dev_dbg(dev, "Not linking to %pOFP - is descendant\n", sup_np);
+ of_node_put(sup_np);
+ return -EINVAL;
+ }
+ sup_dev = get_dev_from_fwnode(&sup_np->fwnode);
+ is_populated = of_node_check_flag(sup_np, OF_POPULATED);
+ of_node_put(sup_np);
+ if (!sup_dev && is_populated) {
+ /* Early device without struct device. */
+ dev_dbg(dev, "Not linking to %pOFP - No struct device\n",
+ sup_np);
+ return -ENODEV;
+ } else if (!sup_dev) {
+ return -EAGAIN;
+ }
+ if (!device_link_add(dev, sup_dev, dl_flags))
+ ret = -EAGAIN;
+ put_device(sup_dev);
+ return ret;
+}
+
+/**
+ * parse_prop_cells - Property parsing function for suppliers
+ *
+ * @np: Pointer to device tree node containing a list
+ * @prop_name: Name of property to be parsed. Expected to hold phandle values
+ * @index: For properties holding a list of phandles, this is the index
+ * into the list.
+ * @list_name: Property name that is known to contain list of phandle(s) to
+ * supplier(s)
+ * @cells_name: property name that specifies phandles' arguments count
+ *
+ * This is a helper function to parse properties that have a known fixed name
+ * and are a list of phandles and phandle arguments.
+ *
+ * Returns:
+ * - phandle node pointer with refcount incremented. Caller must of_node_put()
+ * on it when done.
+ * - NULL if no phandle found at index
+ */
+static struct device_node *parse_prop_cells(struct device_node *np,
+ const char *prop_name, int index,
+ const char *list_name,
+ const char *cells_name)
+{
+ struct of_phandle_args sup_args;
+
+ if (strcmp(prop_name, list_name))
+ return NULL;
+
+ if (of_parse_phandle_with_args(np, list_name, cells_name, index,
+ &sup_args))
+ return NULL;
+
+ return sup_args.np;
+}
+
+#define DEFINE_SIMPLE_PROP(fname, name, cells) \
+static struct device_node *parse_##fname(struct device_node *np, \
+ const char *prop_name, int index) \
+{ \
+ return parse_prop_cells(np, prop_name, index, name, cells); \
+}
+
+static int strcmp_suffix(const char *str, const char *suffix)
+{
+ unsigned int len, suffix_len;
+
+ len = strlen(str);
+ suffix_len = strlen(suffix);
+ if (len <= suffix_len)
+ return -1;
+ return strcmp(str + len - suffix_len, suffix);
+}
+
+/**
+ * parse_suffix_prop_cells - Suffix property parsing function for suppliers
+ *
+ * @np: Pointer to device tree node containing a list
+ * @prop_name: Name of property to be parsed. Expected to hold phandle values
+ * @index: For properties holding a list of phandles, this is the index
+ * into the list.
+ * @suffix: Property suffix that is known to contain list of phandle(s) to
+ * supplier(s)
+ * @cells_name: property name that specifies phandles' arguments count
+ *
+ * This is a helper function to parse properties that have a known fixed suffix
+ * and are a list of phandles and phandle arguments.
+ *
+ * Returns:
+ * - phandle node pointer with refcount incremented. Caller must of_node_put()
+ * on it when done.
+ * - NULL if no phandle found at index
+ */
+static struct device_node *parse_suffix_prop_cells(struct device_node *np,
+ const char *prop_name, int index,
+ const char *suffix,
+ const char *cells_name)
+{
+ struct of_phandle_args sup_args;
+
+ if (strcmp_suffix(prop_name, suffix))
+ return NULL;
+
+ if (of_parse_phandle_with_args(np, prop_name, cells_name, index,
+ &sup_args))
+ return NULL;
+
+ return sup_args.np;
+}
+
+#define DEFINE_SUFFIX_PROP(fname, suffix, cells) \
+static struct device_node *parse_##fname(struct device_node *np, \
+ const char *prop_name, int index) \
+{ \
+ return parse_suffix_prop_cells(np, prop_name, index, suffix, cells); \
+}
+
+/**
+ * struct supplier_bindings - Property parsing functions for suppliers
+ *
+ * @parse_prop: function name
+ * parse_prop() finds the node corresponding to a supplier phandle
+ * @parse_prop.np: Pointer to device node holding supplier phandle property
+ * @parse_prop.prop_name: Name of property holding a phandle value
+ * @parse_prop.index: For properties holding a list of phandles, this is the
+ * index into the list
+ *
+ * Returns:
+ * parse_prop() return values are
+ * - phandle node pointer with refcount incremented. Caller must of_node_put()
+ * on it when done.
+ * - NULL if no phandle found at index
+ */
+struct supplier_bindings {
+ struct device_node *(*parse_prop)(struct device_node *np,
+ const char *prop_name, int index);
+};
+
+DEFINE_SIMPLE_PROP(clocks, "clocks", "#clock-cells")
+DEFINE_SIMPLE_PROP(interconnects, "interconnects", "#interconnect-cells")
+DEFINE_SIMPLE_PROP(iommus, "iommus", "#iommu-cells")
+DEFINE_SIMPLE_PROP(mboxes, "mboxes", "#mbox-cells")
+DEFINE_SIMPLE_PROP(io_channels, "io-channel", "#io-channel-cells")
+DEFINE_SIMPLE_PROP(interrupt_parent, "interrupt-parent", NULL)
+DEFINE_SIMPLE_PROP(dmas, "dmas", "#dma-cells")
+DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)
+DEFINE_SUFFIX_PROP(gpio, "-gpio", "#gpio-cells")
+DEFINE_SUFFIX_PROP(gpios, "-gpios", "#gpio-cells")
+
+static struct device_node *parse_iommu_maps(struct device_node *np,
+ const char *prop_name, int index)
+{
+ if (strcmp(prop_name, "iommu-map"))
+ return NULL;
+
+ return of_parse_phandle(np, prop_name, (index * 4) + 1);
+}
+
+static const struct supplier_bindings of_supplier_bindings[] = {
+ { .parse_prop = parse_clocks, },
+ { .parse_prop = parse_interconnects, },
+ { .parse_prop = parse_iommus, },
+ { .parse_prop = parse_iommu_maps, },
+ { .parse_prop = parse_mboxes, },
+ { .parse_prop = parse_io_channels, },
+ { .parse_prop = parse_interrupt_parent, },
+ { .parse_prop = parse_dmas, },
+ { .parse_prop = parse_regulators, },
+ { .parse_prop = parse_gpio, },
+ { .parse_prop = parse_gpios, },
+ {}
+};
+
+/**
+ * of_link_property - Create device links to suppliers listed in a property
+ * @dev: Consumer device
+ * @con_np: The consumer device tree node which contains the property
+ * @prop_name: Name of property to be parsed
+ *
+ * This function checks if the property @prop_name that is present in the
+ * @con_np device tree node is one of the known common device tree bindings
+ * that list phandles to suppliers. If @prop_name isn't one, this function
+ * doesn't do anything.
+ *
+ * If @prop_name is one, this function attempts to create device links from the
+ * consumer device @dev to all the devices of the suppliers listed in
+ * @prop_name.
+ *
+ * Any failed attempt to create a device link will NOT result in an immediate
+ * return. of_link_property() must create links to all the available supplier
+ * devices even when attempts to create a link to one or more suppliers fail.
+ */
+static int of_link_property(struct device *dev, struct device_node *con_np,
+ const char *prop_name)
+{
+ struct device_node *phandle;
+ const struct supplier_bindings *s = of_supplier_bindings;
+ unsigned int i = 0;
+ bool matched = false;
+ int ret = 0;
+ u32 dl_flags;
+
+ if (dev->of_node == con_np)
+ dl_flags = DL_FLAG_AUTOPROBE_CONSUMER;
+ else
+ dl_flags = DL_FLAG_SYNC_STATE_ONLY;
+
+ /* Do not stop at first failed link, link all available suppliers. */
+ while (!matched && s->parse_prop) {
+ while ((phandle = s->parse_prop(con_np, prop_name, i))) {
+ matched = true;
+ i++;
+ if (of_link_to_phandle(dev, phandle, dl_flags)
+ == -EAGAIN)
+ ret = -EAGAIN;
+ of_node_put(phandle);
+ }
+ s++;
+ }
+ return ret;
+}
+
+static int of_link_to_suppliers(struct device *dev,
+ struct device_node *con_np)
+{
+ struct device_node *child;
+ struct property *p;
+ int ret = 0;
+
+ for_each_property_of_node(con_np, p)
+ if (of_link_property(dev, con_np, p->name))
+ ret = -ENODEV;
+
+ for_each_child_of_node(con_np, child)
+ if (of_link_to_suppliers(dev, child) && !ret)
+ ret = -EAGAIN;
+
+ return ret;
+}
+
+static bool of_devlink;
+core_param(of_devlink, of_devlink, bool, 0);
+
+static int of_fwnode_add_links(const struct fwnode_handle *fwnode,
+ struct device *dev)
+{
+ if (!of_devlink)
+ return 0;
+
+ if (unlikely(!is_of_node(fwnode)))
+ return 0;
+
+ return of_link_to_suppliers(dev, to_of_node(fwnode));
+}
+
const struct fwnode_operations of_fwnode_ops = {
.get = of_fwnode_get,
.put = of_fwnode_put,
@@ -1017,5 +1332,6 @@ const struct fwnode_operations of_fwnode_ops = {
.graph_get_remote_endpoint = of_fwnode_graph_get_remote_endpoint,
.graph_get_port_parent = of_fwnode_graph_get_port_parent,
.graph_parse_endpoint = of_fwnode_graph_parse_endpoint,
+ .add_links = of_fwnode_add_links,
};
EXPORT_SYMBOL_GPL(of_fwnode_ops);
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 22e5d4e13714..58bf9d496ba5 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -54,6 +54,7 @@
#ifdef CONFIG_SUPERH
#include <asm/sh_bios.h>
+#include <asm/platform_early.h>
#endif
#include "serial_mctrl_gpio.h"
@@ -3090,6 +3091,7 @@ static struct console serial_console = {
.data = &sci_uart_driver,
};
+#ifdef CONFIG_SUPERH
static struct console early_serial_console = {
.name = "early_ttySC",
.write = serial_console_write,
@@ -3118,6 +3120,7 @@ static int sci_probe_earlyprintk(struct platform_device *pdev)
register_console(&early_serial_console);
return 0;
}
+#endif
#define SCI_CONSOLE (&serial_console)
@@ -3318,8 +3321,10 @@ static int sci_probe(struct platform_device *dev)
* the special early probe. We don't have sufficient device state
* to make it beyond this yet.
*/
- if (is_early_platform_device(dev))
+#ifdef CONFIG_SUPERH
+ if (is_sh_early_platform_device(dev))
return sci_probe_earlyprintk(dev);
+#endif
if (dev->dev.of_node) {
p = sci_parse_dt(dev, &dev_id);
@@ -3414,8 +3419,8 @@ static void __exit sci_exit(void)
uart_unregister_driver(&sci_uart_driver);
}
-#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
-early_platform_init_buffer("earlyprintk", &sci_driver,
+#if defined(CONFIG_SUPERH) && defined(CONFIG_SERIAL_SH_SCI_CONSOLE)
+sh_early_platform_init_buffer("earlyprintk", &sci_driver,
early_serial_buf, ARRAY_SIZE(early_serial_buf));
#endif
#ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 87846aad594b..dede25247b81 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -420,20 +420,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u8_wo, NULL, debugfs_u8_set, "%llu\n");
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value)
+void debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
&fops_u8_ro, &fops_u8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u8);
@@ -465,20 +456,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u16_wo, NULL, debugfs_u16_set, "%llu\n");
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value)
+void debugfs_create_u16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u16,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u16,
&fops_u16_ro, &fops_u16_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u16);
@@ -556,20 +538,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value)
+void debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64,
&fops_u64_ro, &fops_u64_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u64);
@@ -660,10 +633,10 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_x64_wo, NULL, debugfs_u64_set, "0x%016llx\n");
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value)
+void debugfs_create_x8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x8,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x8,
&fops_x8_ro, &fops_x8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x8);
@@ -678,10 +651,10 @@ EXPORT_SYMBOL_GPL(debugfs_create_x8);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value)
+void debugfs_create_x16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x16,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x16,
&fops_x16_ro, &fops_x16_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x16);
@@ -696,10 +669,10 @@ EXPORT_SYMBOL_GPL(debugfs_create_x16);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent, u32 *value)
+void debugfs_create_x32(const char *name, umode_t mode, struct dentry *parent,
+ u32 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x32,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x32,
&fops_x32_ro, &fops_x32_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x32);
@@ -714,10 +687,10 @@ EXPORT_SYMBOL_GPL(debugfs_create_x32);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value)
+void debugfs_create_x64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x64,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x64,
&fops_x64_ro, &fops_x64_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x64);
@@ -748,12 +721,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_size_t_wo, NULL, debugfs_size_t_set, "%llu\n");
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent, size_t *value)
+void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value,
- &fops_size_t, &fops_size_t_ro,
- &fops_size_t_wo);
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_size_t,
+ &fops_size_t_ro, &fops_size_t_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_size_t);
@@ -785,12 +757,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_wo, NULL, debugfs_atomic_t_set,
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value)
+void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent, atomic_t *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value,
- &fops_atomic_t, &fops_atomic_t_ro,
- &fops_atomic_t_wo);
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_atomic_t,
+ &fops_atomic_t_ro, &fops_atomic_t_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_atomic_t);
diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h
index 42f2b5126094..3015ecbb90b1 100644
--- a/include/linux/arch_topology.h
+++ b/include/linux/arch_topology.h
@@ -57,6 +57,7 @@ const struct cpumask *cpu_coregroup_mask(int cpu);
void update_siblings_masks(unsigned int cpu);
void remove_cpu_topology(unsigned int cpuid);
void reset_cpu_topology(void);
+int parse_acpi_topology(void);
#endif
#endif /* _LINUX_ARCH_TOPOLOGY_H_ */
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index 58424eb3b329..bf9b6cafa4c2 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -54,6 +54,8 @@ static const struct file_operations __fops = { \
.llseek = no_llseek, \
}
+typedef struct vfsmount *(*debugfs_automount_t)(struct dentry *, void *);
+
#if defined(CONFIG_DEBUG_FS)
struct dentry *debugfs_lookup(const char *name, struct dentry *parent);
@@ -75,7 +77,6 @@ struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
const char *dest);
-typedef struct vfsmount *(*debugfs_automount_t)(struct dentry *, void *);
struct dentry *debugfs_create_automount(const char *name,
struct dentry *parent,
debugfs_automount_t f,
@@ -97,28 +98,28 @@ ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
struct dentry *new_dir, const char *new_name);
-struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value);
-struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value);
+void debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value);
+void debugfs_create_u16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent, u32 *value);
-struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value);
+void debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value);
struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
struct dentry *parent, unsigned long *value);
-struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value);
-struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value);
-struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent, u32 *value);
-struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value);
-struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent, size_t *value);
-struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value);
+void debugfs_create_x8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value);
+void debugfs_create_x16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value);
+void debugfs_create_x32(const char *name, umode_t mode, struct dentry *parent,
+ u32 *value);
+void debugfs_create_x64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value);
+void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value);
+void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent, atomic_t *value);
struct dentry *debugfs_create_bool(const char *name, umode_t mode,
struct dentry *parent, bool *value);
@@ -203,7 +204,7 @@ static inline struct dentry *debugfs_create_symlink(const char *name,
static inline struct dentry *debugfs_create_automount(const char *name,
struct dentry *parent,
- struct vfsmount *(*f)(void *),
+ debugfs_automount_t f,
void *data)
{
return ERR_PTR(-ENODEV);
@@ -244,19 +245,11 @@ static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentr
return ERR_PTR(-ENODEV);
}
-static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent,
- u8 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_u8(const char *name, umode_t mode,
+ struct dentry *parent, u8 *value) { }
-static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent,
- u16 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_u16(const char *name, umode_t mode,
+ struct dentry *parent, u16 *value) { }
static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent,
@@ -265,12 +258,8 @@ static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
return ERR_PTR(-ENODEV);
}
-static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent,
- u64 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_u64(const char *name, umode_t mode,
+ struct dentry *parent, u64 *value) { }
static inline struct dentry *debugfs_create_ulong(const char *name,
umode_t mode,
@@ -280,46 +269,26 @@ static inline struct dentry *debugfs_create_ulong(const char *name,
return ERR_PTR(-ENODEV);
}
-static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent,
- u8 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_x8(const char *name, umode_t mode,
+ struct dentry *parent, u8 *value) { }
-static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent,
- u16 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_x16(const char *name, umode_t mode,
+ struct dentry *parent, u16 *value) { }
-static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent,
- u32 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_x32(const char *name, umode_t mode,
+ struct dentry *parent, u32 *value) { }
-static inline struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent,
- u64 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_x64(const char *name, umode_t mode,
+ struct dentry *parent, u64 *value) { }
-static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent,
- size_t *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value)
+{ }
-static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent,
+ atomic_t *value)
+{ }
static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
struct dentry *parent,
@@ -383,4 +352,25 @@ static inline ssize_t debugfs_write_file_bool(struct file *file,
#endif
+/**
+ * debugfs_create_xul - create a debugfs file that is used to read and write an
+ * unsigned long value, formatted in hexadecimal
+ * @name: a pointer to a string containing the name of the file to create.
+ * @mode: the permission that the file should have
+ * @parent: a pointer to the parent dentry for this file. This should be a
+ * directory dentry if set. If this parameter is %NULL, then the
+ * file will be created in the root of the debugfs filesystem.
+ * @value: a pointer to the variable that the file should read to and write
+ * from.
+ */
+static inline void debugfs_create_xul(const char *name, umode_t mode,
+ struct dentry *parent,
+ unsigned long *value)
+{
+ if (sizeof(*value) == sizeof(u32))
+ debugfs_create_x32(name, mode, parent, (u32 *)value);
+ else
+ debugfs_create_x64(name, mode, parent, (u64 *)value);
+}
+
#endif
diff --git a/include/linux/device.h b/include/linux/device.h
index 297239a08bb7..f05c5b92e61f 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -80,6 +80,13 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
* that generate uevents to add the environment variables.
* @probe: Called when a new device or driver add to this bus, and callback
* the specific driver's probe to initial the matched device.
+ * @sync_state: Called to sync device state to software state after all the
+ * state tracking consumers linked to this device (present at
+ * the time of late_initcall) have successfully bound to a
+ * driver. If the device has no consumers, this function will
+ * be called at late_initcall_sync level. If the device has
+ * consumers that are never bound to a driver, this function
+ * will never get called until they do.
* @remove: Called when a device removed from this bus.
* @shutdown: Called at shut-down time to quiesce the device.
*
@@ -123,6 +130,7 @@ struct bus_type {
int (*match)(struct device *dev, struct device_driver *drv);
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
int (*probe)(struct device *dev);
+ void (*sync_state)(struct device *dev);
int (*remove)(struct device *dev);
void (*shutdown)(struct device *dev);
@@ -340,6 +348,13 @@ enum probe_type {
* @probe: Called to query the existence of a specific device,
* whether this driver can work with it, and bind the driver
* to a specific device.
+ * @sync_state: Called to sync device state to software state after all the
+ * state tracking consumers linked to this device (present at
+ * the time of late_initcall) have successfully bound to a
+ * driver. If the device has no consumers, this function will
+ * be called at late_initcall_sync level. If the device has
+ * consumers that are never bound to a driver, this function
+ * will never get called until they do.
* @remove: Called when the device is removed from the system to
* unbind a device from this driver.
* @shutdown: Called at shut-down time to quiesce the device.
@@ -379,6 +394,7 @@ struct device_driver {
const struct acpi_device_id *acpi_match_table;
int (*probe) (struct device *dev);
+ void (*sync_state)(struct device *dev);
int (*remove) (struct device *dev);
void (*shutdown) (struct device *dev);
int (*suspend) (struct device *dev, pm_message_t state);
@@ -946,6 +962,8 @@ extern void devm_free_pages(struct device *dev, unsigned long addr);
void __iomem *devm_ioremap_resource(struct device *dev,
const struct resource *res);
+void __iomem *devm_ioremap_resource_wc(struct device *dev,
+ const struct resource *res);
void __iomem *devm_of_iomap(struct device *dev,
struct device_node *node, int index,
@@ -1080,6 +1098,7 @@ enum device_link_state {
* AUTOREMOVE_SUPPLIER: Remove the link automatically on supplier driver unbind.
* AUTOPROBE_CONSUMER: Probe consumer driver automatically after supplier binds.
* MANAGED: The core tracks presence of supplier/consumer drivers (internal).
+ * SYNC_STATE_ONLY: Link only affects sync_state() behavior.
*/
#define DL_FLAG_STATELESS BIT(0)
#define DL_FLAG_AUTOREMOVE_CONSUMER BIT(1)
@@ -1088,6 +1107,7 @@ enum device_link_state {
#define DL_FLAG_AUTOREMOVE_SUPPLIER BIT(4)
#define DL_FLAG_AUTOPROBE_CONSUMER BIT(5)
#define DL_FLAG_MANAGED BIT(6)
+#define DL_FLAG_SYNC_STATE_ONLY BIT(7)
/**
* struct device_link - Device link representation.
@@ -1135,11 +1155,18 @@ enum dl_dev_state {
* struct dev_links_info - Device data related to device links.
* @suppliers: List of links to supplier devices.
* @consumers: List of links to consumer devices.
+ * @needs_suppliers: Hook to global list of devices waiting for suppliers.
+ * @defer_sync: Hook to global list of devices that have deferred sync_state.
+ * @need_for_probe: If needs_suppliers is on a list, this indicates if the
+ * suppliers are needed for probe or not.
* @status: Driver status information.
*/
struct dev_links_info {
struct list_head suppliers;
struct list_head consumers;
+ struct list_head needs_suppliers;
+ struct list_head defer_sync;
+ bool need_for_probe;
enum dl_dev_state status;
};
@@ -1215,6 +1242,9 @@ struct dev_links_info {
* @offline: Set after successful invocation of bus type's .offline().
* @of_node_reused: Set if the device-tree node is shared with an ancestor
* device.
+ * @state_synced: The hardware state of this device has been synced to match
+ * the software state of this device by calling the driver/bus
+ * sync_state() callback.
* @dma_coherent: this particular device is dma coherent, even if the
* architecture supports non-coherent devices.
*
@@ -1311,6 +1341,7 @@ struct device {
bool offline_disabled:1;
bool offline:1;
bool of_node_reused:1;
+ bool state_synced:1;
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
@@ -1653,6 +1684,8 @@ struct device_link *device_link_add(struct device *consumer,
struct device *supplier, u32 flags);
void device_link_del(struct device_link *link);
void device_link_remove(void *consumer, struct device *supplier);
+void device_links_supplier_sync_state_pause(void);
+void device_links_supplier_sync_state_resume(void);
#ifndef dev_fmt
#define dev_fmt(fmt) fmt
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index 9d9dc444d787..8feeb94b8acc 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -17,6 +17,7 @@ struct device;
struct fwnode_handle {
struct fwnode_handle *secondary;
const struct fwnode_operations *ops;
+ struct device *dev;
};
/**
@@ -67,6 +68,44 @@ struct fwnode_reference_args {
* endpoint node.
* @graph_get_port_parent: Return the parent node of a port node.
* @graph_parse_endpoint: Parse endpoint for port and endpoint id.
+ * @add_links: Called after the device corresponding to the fwnode is added
+ * using device_add(). The function is expected to create device
+ * links to all the suppliers of the device that are available at
+ * the time this function is called. The function must NOT stop
+ * at the first failed device link if other unlinked supplier
+ * devices are present in the system. This is necessary for the
+ * driver/bus sync_state() callbacks to work correctly.
+ *
+ * For example, say Device-C depends on suppliers Device-S1 and
+ * Device-S2 and the dependency is listed in that order in the
+ * firmware. Say, S1 gets populated from the firmware after
+ * late_initcall_sync(). Say S2 is populated and probed way
+ * before that in device_initcall(). When C is populated, if this
+ * add_links() function doesn't continue past a "failed linking to
+ * S1" and continue linking C to S2, then S2 will get a
+ * sync_state() callback before C is probed. This is because from
+ * the perspective of S2, C was never a consumer when its
+ * sync_state() evaluation is done. To avoid this, the add_links()
+ * function has to go through all available suppliers of the
+ * device (that corresponds to this fwnode) and link to them
+ * before returning.
+ *
+ * If some suppliers are not yet available (indicated by an error
+ * return value), this function will be called again when other
+ * devices are added to allow creating device links to any newly
+ * available suppliers.
+ *
+ * Return 0 if device links have been successfully created to all
+ * the known suppliers of this device or if the supplier
+ * information is not known.
+ *
+ * Return -ENODEV if the suppliers needed for probing this device
+ * have not been registered yet (because device links can only be
+ * created to devices registered with the driver core).
+ *
+ * Return -EAGAIN if some of the suppliers of this device have not
+ * been registered yet, but none of those suppliers are necessary
+ * for probing the device.
*/
struct fwnode_operations {
struct fwnode_handle *(*get)(struct fwnode_handle *fwnode);
@@ -106,6 +145,8 @@ struct fwnode_operations {
(*graph_get_port_parent)(struct fwnode_handle *fwnode);
int (*graph_parse_endpoint)(const struct fwnode_handle *fwnode,
struct fwnode_endpoint *endpoint);
+ int (*add_links)(const struct fwnode_handle *fwnode,
+ struct device *dev);
};
#define fwnode_has_op(fwnode, op) \
@@ -127,5 +168,6 @@ struct fwnode_operations {
if (fwnode_has_op(fwnode, op)) \
(fwnode)->ops->op(fwnode, ## __VA_ARGS__); \
} while (false)
+#define get_dev_from_fwnode(fwnode) get_device((fwnode)->dev)
#endif
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index f2688404d1cd..276a03c24691 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -57,6 +57,12 @@ platform_find_device_by_driver(struct device *start,
extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);
+extern void __iomem *
+devm_platform_ioremap_resource_wc(struct platform_device *pdev,
+ unsigned int index);
+extern void __iomem *
+devm_platform_ioremap_resource_byname(struct platform_device *pdev,
+ const char *name);
extern int platform_get_irq(struct platform_device *, unsigned int);
extern int platform_get_irq_optional(struct platform_device *, unsigned int);
extern int platform_irq_count(struct platform_device *);
@@ -294,58 +300,6 @@ void platform_unregister_drivers(struct platform_driver * const *drivers,
#define platform_register_drivers(drivers, count) \
__platform_register_drivers(drivers, count, THIS_MODULE)
-/* early platform driver interface */
-struct early_platform_driver {
- const char *class_str;
- struct platform_driver *pdrv;
- struct list_head list;
- int requested_id;
- char *buffer;
- int bufsize;
-};
-
-#define EARLY_PLATFORM_ID_UNSET -2
-#define EARLY_PLATFORM_ID_ERROR -3
-
-extern int early_platform_driver_register(struct early_platform_driver *epdrv,
- char *buf);
-extern void early_platform_add_devices(struct platform_device **devs, int num);
-
-static inline int is_early_platform_device(struct platform_device *pdev)
-{
- return !pdev->dev.driver;
-}
-
-extern void early_platform_driver_register_all(char *class_str);
-extern int early_platform_driver_probe(char *class_str,
- int nr_probe, int user_only);
-extern void early_platform_cleanup(void);
-
-#define early_platform_init(class_string, platdrv) \
- early_platform_init_buffer(class_string, platdrv, NULL, 0)
-
-#ifndef MODULE
-#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
-static __initdata struct early_platform_driver early_driver = { \
- .class_str = class_string, \
- .buffer = buf, \
- .bufsize = bufsiz, \
- .pdrv = platdrv, \
- .requested_id = EARLY_PLATFORM_ID_UNSET, \
-}; \
-static int __init early_platform_driver_setup_func(char *buffer) \
-{ \
- return early_platform_driver_register(&early_driver, buffer); \
-} \
-early_param(class_string, early_platform_driver_setup_func)
-#else /* MODULE */
-#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
-static inline char *early_platform_driver_setup_func(void) \
-{ \
- return bufsiz ? buf : NULL; \
-}
-#endif /* MODULE */
-
#ifdef CONFIG_SUSPEND
extern int platform_pm_suspend(struct device *dev);
extern int platform_pm_resume(struct device *dev);
@@ -380,4 +334,16 @@ extern int platform_dma_configure(struct device *dev);
#define USE_PLATFORM_PM_SLEEP_OPS
#endif
+#ifndef CONFIG_SUPERH
+/*
+ * REVISIT: This stub is needed for all non-SuperH users of early platform
+ * drivers. It should go away once we introduce the new platform_device-based
+ * early driver framework.
+ */
+static inline int is_sh_early_platform_device(struct platform_device *pdev)
+{
+ return 0;
+}
+#endif /* CONFIG_SUPERH */
+
#endif /* _PLATFORM_DEVICE_H_ */
diff --git a/include/linux/sys_soc.h b/include/linux/sys_soc.h
index 48ceea867dd6..d9b3cf0f410c 100644
--- a/include/linux/sys_soc.h
+++ b/include/linux/sys_soc.h
@@ -15,6 +15,7 @@ struct soc_device_attribute {
const char *serial_number;
const char *soc_id;
const void *data;
+ const struct attribute_group *custom_attr_group;
};
/**
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index e08527f50d2a..382628b9b759 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -106,7 +106,6 @@ config PREEMPTIRQ_TRACEPOINTS
config TRACING
bool
- select DEBUG_FS
select RING_BUFFER
select STACKTRACE if STACKTRACE_SUPPORT
select TRACEPOINTS
diff --git a/lib/devres.c b/lib/devres.c
index 6a0e9bd6524a..97fb44e5b4d6 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -114,6 +114,37 @@ void devm_iounmap(struct device *dev, void __iomem *addr)
}
EXPORT_SYMBOL(devm_iounmap);
+static void __iomem *
+__devm_ioremap_resource(struct device *dev, const struct resource *res,
+ enum devm_ioremap_type type)
+{
+ resource_size_t size;
+ void __iomem *dest_ptr;
+
+ BUG_ON(!dev);
+
+ if (!res || resource_type(res) != IORESOURCE_MEM) {
+ dev_err(dev, "invalid resource\n");
+ return IOMEM_ERR_PTR(-EINVAL);
+ }
+
+ size = resource_size(res);
+
+ if (!devm_request_mem_region(dev, res->start, size, dev_name(dev))) {
+ dev_err(dev, "can't request region for resource %pR\n", res);
+ return IOMEM_ERR_PTR(-EBUSY);
+ }
+
+ dest_ptr = __devm_ioremap(dev, res->start, size, type);
+ if (!dest_ptr) {
+ dev_err(dev, "ioremap failed for resource %pR\n", res);
+ devm_release_mem_region(dev, res->start, size);
+ dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
+ }
+
+ return dest_ptr;
+}
+
/**
* devm_ioremap_resource() - check, request region, and ioremap resource
* @dev: generic device to handle the resource for
@@ -134,34 +165,25 @@ EXPORT_SYMBOL(devm_iounmap);
void __iomem *devm_ioremap_resource(struct device *dev,
const struct resource *res)
{
- resource_size_t size;
- void __iomem *dest_ptr;
-
- BUG_ON(!dev);
-
- if (!res || resource_type(res) != IORESOURCE_MEM) {
- dev_err(dev, "invalid resource\n");
- return IOMEM_ERR_PTR(-EINVAL);
- }
-
- size = resource_size(res);
-
- if (!devm_request_mem_region(dev, res->start, size, dev_name(dev))) {
- dev_err(dev, "can't request region for resource %pR\n", res);
- return IOMEM_ERR_PTR(-EBUSY);
- }
-
- dest_ptr = devm_ioremap(dev, res->start, size);
- if (!dest_ptr) {
- dev_err(dev, "ioremap failed for resource %pR\n", res);
- devm_release_mem_region(dev, res->start, size);
- dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
- }
-
- return dest_ptr;
+ return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
}
EXPORT_SYMBOL(devm_ioremap_resource);
+/**
+ * devm_ioremap_resource_wc() - write-combined variant of
+ * devm_ioremap_resource()
+ * @dev: generic device to handle the resource for
+ * @res: resource to be handled
+ *
+ * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure. Usage example:
+ */
+void __iomem *devm_ioremap_resource_wc(struct device *dev,
+ const struct resource *res)
+{
+ return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
+}
+
/*
* devm_of_iomap - Requests a resource and maps the memory mapped IO
* for a given device_node managed by a given device
diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 0185e6e5e5d1..b3c9001d1f43 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -951,12 +951,7 @@ STA_OPS(he_capa);
sta->debugfs_dir, sta, &sta_ ##name## _ops);
#define DEBUGFS_ADD_COUNTER(name, field) \
- if (sizeof(sta->field) == sizeof(u32)) \
- debugfs_create_u32(#name, 0400, sta->debugfs_dir, \
- (u32 *) &sta->field); \
- else \
- debugfs_create_u64(#name, 0400, sta->debugfs_dir, \
- (u64 *) &sta->field);
+ debugfs_create_ulong(#name, 0400, sta->debugfs_dir, &sta->field);
void ieee80211_sta_debugfs_add(struct sta_info *sta)
{
@@ -1001,14 +996,8 @@ void ieee80211_sta_debugfs_add(struct sta_info *sta)
NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
DEBUGFS_ADD(airtime);
- if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
- debugfs_create_x32("driver_buffered_tids", 0400,
- sta->debugfs_dir,
- (u32 *)&sta->driver_buffered_tids);
- else
- debugfs_create_x64("driver_buffered_tids", 0400,
- sta->debugfs_dir,
- (u64 *)&sta->driver_buffered_tids);
+ debugfs_create_xul("driver_buffered_tids", 0400, sta->debugfs_dir,
+ &sta->driver_buffered_tids);
drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
}