forked from Minki/linux
PM / OPP: Move CONFIG_OF dependent code in a separate file
Recently, a few issues were noticed in the code where CONFIG_OF wasn't consistently used for many routines. The core file is big enough now and ifdef hackery makes it less readable. Move OF-specific code to another file and compile that only if CONFIG_OF is enabled. Compile-tested: - For ARM (exynos) with CONFIG_OF enabled - For X86 with CONFIG_OF disabled (have to enable CONFIG_PM_OPP separately) No functional changes. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
Rafael J. Wysocki
parent
411466c508
commit
f47b72a15a
@ -1,3 +1,4 @@
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ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG
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obj-y += core.o cpu.o
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obj-$(CONFIG_OF) += of.o
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obj-$(CONFIG_DEBUG_FS) += debugfs.o
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@ -18,7 +18,6 @@
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/of.h>
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#include <linux/export.h>
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#include <linux/regulator/consumer.h>
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@ -29,7 +28,7 @@
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* from here, with each opp_table containing the list of opps it supports in
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* various states of availability.
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*/
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static LIST_HEAD(opp_tables);
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LIST_HEAD(opp_tables);
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/* Lock to allow exclusive modification to the device and opp lists */
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DEFINE_MUTEX(opp_table_lock);
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@ -53,26 +52,6 @@ static struct opp_device *_find_opp_dev(const struct device *dev,
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return NULL;
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}
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static struct opp_table *_managed_opp(const struct device_node *np)
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{
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struct opp_table *opp_table;
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list_for_each_entry_rcu(opp_table, &opp_tables, node) {
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if (opp_table->np == np) {
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/*
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* Multiple devices can point to the same OPP table and
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* so will have same node-pointer, np.
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*
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* But the OPPs will be considered as shared only if the
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* OPP table contains a "opp-shared" property.
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*/
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return opp_table->shared_opp ? opp_table : NULL;
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}
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}
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return NULL;
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}
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/**
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* _find_opp_table() - find opp_table struct using device pointer
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* @dev: device pointer used to lookup OPP table
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@ -760,7 +739,6 @@ static struct opp_table *_add_opp_table(struct device *dev)
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{
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struct opp_table *opp_table;
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struct opp_device *opp_dev;
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struct device_node *np;
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int ret;
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/* Check for existing table for 'dev' first */
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@ -784,20 +762,7 @@ static struct opp_table *_add_opp_table(struct device *dev)
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return NULL;
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}
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/*
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* Only required for backward compatibility with v1 bindings, but isn't
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* harmful for other cases. And so we do it unconditionally.
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*/
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np = of_node_get(dev->of_node);
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if (np) {
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u32 val;
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if (!of_property_read_u32(np, "clock-latency", &val))
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opp_table->clock_latency_ns_max = val;
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of_property_read_u32(np, "voltage-tolerance",
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&opp_table->voltage_tolerance_v1);
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of_node_put(np);
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}
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_of_init_opp_table(opp_table, dev);
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/* Set regulator to a non-NULL error value */
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opp_table->regulator = ERR_PTR(-ENXIO);
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@ -893,8 +858,8 @@ static void _kfree_opp_rcu(struct rcu_head *head)
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* It is assumed that the caller holds required mutex for an RCU updater
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* strategy.
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*/
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static void _opp_remove(struct opp_table *opp_table,
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struct dev_pm_opp *opp, bool notify)
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void _opp_remove(struct opp_table *opp_table, struct dev_pm_opp *opp,
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bool notify)
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{
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/*
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* Notify the changes in the availability of the operable
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@ -955,8 +920,8 @@ unlock:
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
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static struct dev_pm_opp *_allocate_opp(struct device *dev,
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struct opp_table **opp_table)
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struct dev_pm_opp *_allocate_opp(struct device *dev,
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struct opp_table **opp_table)
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{
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struct dev_pm_opp *opp;
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@ -992,8 +957,8 @@ static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
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return true;
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}
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static int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
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struct opp_table *opp_table)
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int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
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struct opp_table *opp_table)
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{
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struct dev_pm_opp *opp;
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struct list_head *head = &opp_table->opp_list;
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@ -1069,8 +1034,8 @@ static int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
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* Duplicate OPPs (both freq and volt are same) and !opp->available
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* -ENOMEM Memory allocation failure
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*/
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static int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
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bool dynamic)
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int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
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bool dynamic)
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{
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struct opp_table *opp_table;
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struct dev_pm_opp *new_opp;
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@ -1115,83 +1080,6 @@ unlock:
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return ret;
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}
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/* TODO: Support multiple regulators */
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static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
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struct opp_table *opp_table)
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{
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u32 microvolt[3] = {0};
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u32 val;
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int count, ret;
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struct property *prop = NULL;
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char name[NAME_MAX];
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/* Search for "opp-microvolt-<name>" */
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if (opp_table->prop_name) {
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snprintf(name, sizeof(name), "opp-microvolt-%s",
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opp_table->prop_name);
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prop = of_find_property(opp->np, name, NULL);
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}
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if (!prop) {
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/* Search for "opp-microvolt" */
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sprintf(name, "opp-microvolt");
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prop = of_find_property(opp->np, name, NULL);
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/* Missing property isn't a problem, but an invalid entry is */
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if (!prop)
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return 0;
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}
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count = of_property_count_u32_elems(opp->np, name);
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if (count < 0) {
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dev_err(dev, "%s: Invalid %s property (%d)\n",
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__func__, name, count);
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return count;
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}
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/* There can be one or three elements here */
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if (count != 1 && count != 3) {
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dev_err(dev, "%s: Invalid number of elements in %s property (%d)\n",
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__func__, name, count);
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return -EINVAL;
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}
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ret = of_property_read_u32_array(opp->np, name, microvolt, count);
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if (ret) {
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dev_err(dev, "%s: error parsing %s: %d\n", __func__, name, ret);
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return -EINVAL;
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}
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opp->u_volt = microvolt[0];
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if (count == 1) {
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opp->u_volt_min = opp->u_volt;
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opp->u_volt_max = opp->u_volt;
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} else {
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opp->u_volt_min = microvolt[1];
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opp->u_volt_max = microvolt[2];
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}
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/* Search for "opp-microamp-<name>" */
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prop = NULL;
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if (opp_table->prop_name) {
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snprintf(name, sizeof(name), "opp-microamp-%s",
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opp_table->prop_name);
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prop = of_find_property(opp->np, name, NULL);
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}
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if (!prop) {
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/* Search for "opp-microamp" */
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sprintf(name, "opp-microamp");
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prop = of_find_property(opp->np, name, NULL);
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}
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if (prop && !of_property_read_u32(opp->np, name, &val))
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opp->u_amp = val;
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return 0;
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}
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/**
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* dev_pm_opp_set_supported_hw() - Set supported platforms
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* @dev: Device for which supported-hw has to be set.
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@ -1520,144 +1408,6 @@ unlock:
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulator);
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static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
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struct device_node *np)
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{
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unsigned int count = opp_table->supported_hw_count;
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u32 version;
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int ret;
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if (!opp_table->supported_hw)
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return true;
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while (count--) {
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ret = of_property_read_u32_index(np, "opp-supported-hw", count,
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&version);
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if (ret) {
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dev_warn(dev, "%s: failed to read opp-supported-hw property at index %d: %d\n",
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__func__, count, ret);
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return false;
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}
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/* Both of these are bitwise masks of the versions */
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if (!(version & opp_table->supported_hw[count]))
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return false;
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}
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return true;
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}
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/**
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* _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings)
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* @dev: device for which we do this operation
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* @np: device node
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*
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* This function adds an opp definition to the opp table and returns status. The
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* opp can be controlled using dev_pm_opp_enable/disable functions and may be
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* removed by dev_pm_opp_remove.
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*
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* Locking: The internal opp_table and opp structures are RCU protected.
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* Hence this function internally uses RCU updater strategy with mutex locks
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* to keep the integrity of the internal data structures. Callers should ensure
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* that this function is *NOT* called under RCU protection or in contexts where
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* mutex cannot be locked.
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*
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* Return:
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* 0 On success OR
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* Duplicate OPPs (both freq and volt are same) and opp->available
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* -EEXIST Freq are same and volt are different OR
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* Duplicate OPPs (both freq and volt are same) and !opp->available
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* -ENOMEM Memory allocation failure
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* -EINVAL Failed parsing the OPP node
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*/
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static int _opp_add_static_v2(struct device *dev, struct device_node *np)
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{
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struct opp_table *opp_table;
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struct dev_pm_opp *new_opp;
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u64 rate;
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u32 val;
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int ret;
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/* Hold our table modification lock here */
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mutex_lock(&opp_table_lock);
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new_opp = _allocate_opp(dev, &opp_table);
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if (!new_opp) {
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ret = -ENOMEM;
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goto unlock;
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}
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ret = of_property_read_u64(np, "opp-hz", &rate);
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if (ret < 0) {
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dev_err(dev, "%s: opp-hz not found\n", __func__);
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goto free_opp;
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}
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/* Check if the OPP supports hardware's hierarchy of versions or not */
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if (!_opp_is_supported(dev, opp_table, np)) {
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dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate);
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goto free_opp;
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}
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/*
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* Rate is defined as an unsigned long in clk API, and so casting
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* explicitly to its type. Must be fixed once rate is 64 bit
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* guaranteed in clk API.
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*/
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new_opp->rate = (unsigned long)rate;
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new_opp->turbo = of_property_read_bool(np, "turbo-mode");
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new_opp->np = np;
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new_opp->dynamic = false;
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new_opp->available = true;
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if (!of_property_read_u32(np, "clock-latency-ns", &val))
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new_opp->clock_latency_ns = val;
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ret = opp_parse_supplies(new_opp, dev, opp_table);
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if (ret)
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goto free_opp;
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ret = _opp_add(dev, new_opp, opp_table);
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if (ret)
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goto free_opp;
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/* OPP to select on device suspend */
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if (of_property_read_bool(np, "opp-suspend")) {
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if (opp_table->suspend_opp) {
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dev_warn(dev, "%s: Multiple suspend OPPs found (%lu %lu)\n",
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__func__, opp_table->suspend_opp->rate,
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new_opp->rate);
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} else {
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new_opp->suspend = true;
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opp_table->suspend_opp = new_opp;
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}
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}
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if (new_opp->clock_latency_ns > opp_table->clock_latency_ns_max)
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opp_table->clock_latency_ns_max = new_opp->clock_latency_ns;
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mutex_unlock(&opp_table_lock);
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pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
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__func__, new_opp->turbo, new_opp->rate, new_opp->u_volt,
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new_opp->u_volt_min, new_opp->u_volt_max,
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new_opp->clock_latency_ns);
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/*
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* Notify the changes in the availability of the operable
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* frequency/voltage list.
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*/
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srcu_notifier_call_chain(&opp_table->srcu_head, OPP_EVENT_ADD, new_opp);
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return 0;
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free_opp:
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_opp_remove(opp_table, new_opp, false);
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unlock:
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mutex_unlock(&opp_table_lock);
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return ret;
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}
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/**
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* dev_pm_opp_add() - Add an OPP table from a table definitions
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* @dev: device for which we do this operation
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@ -1849,7 +1599,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
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* Free OPPs either created using static entries present in DT or even the
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* dynamically added entries based on remove_all param.
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*/
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static void _dev_pm_opp_remove_table(struct device *dev, bool remove_all)
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void _dev_pm_opp_remove_table(struct device *dev, bool remove_all)
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{
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struct opp_table *opp_table;
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struct dev_pm_opp *opp, *tmp;
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@ -1903,179 +1653,3 @@ void dev_pm_opp_remove_table(struct device *dev)
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_dev_pm_opp_remove_table(dev, true);
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table);
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#ifdef CONFIG_OF
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/**
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* dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT
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* entries
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* @dev: device pointer used to lookup OPP table.
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*
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* Free OPPs created using static entries present in DT.
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*
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* Locking: The internal opp_table and opp structures are RCU protected.
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* Hence this function indirectly uses RCU updater strategy with mutex locks
|
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* to keep the integrity of the internal data structures. Callers should ensure
|
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* that this function is *NOT* called under RCU protection or in contexts where
|
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* mutex cannot be locked.
|
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*/
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void dev_pm_opp_of_remove_table(struct device *dev)
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{
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_dev_pm_opp_remove_table(dev, false);
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
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/* Returns opp descriptor node for a device, caller must do of_node_put() */
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struct device_node *_of_get_opp_desc_node(struct device *dev)
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{
|
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/*
|
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* TODO: Support for multiple OPP tables.
|
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*
|
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* There should be only ONE phandle present in "operating-points-v2"
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* property.
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*/
|
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return of_parse_phandle(dev->of_node, "operating-points-v2", 0);
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}
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/* Initializes OPP tables based on new bindings */
|
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static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
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{
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struct device_node *np;
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struct opp_table *opp_table;
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int ret = 0, count = 0;
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mutex_lock(&opp_table_lock);
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opp_table = _managed_opp(opp_np);
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if (opp_table) {
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/* OPPs are already managed */
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if (!_add_opp_dev(dev, opp_table))
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ret = -ENOMEM;
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mutex_unlock(&opp_table_lock);
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return ret;
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}
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mutex_unlock(&opp_table_lock);
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/* We have opp-table node now, iterate over it and add OPPs */
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for_each_available_child_of_node(opp_np, np) {
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count++;
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ret = _opp_add_static_v2(dev, np);
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if (ret) {
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dev_err(dev, "%s: Failed to add OPP, %d\n", __func__,
|
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ret);
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goto free_table;
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}
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}
|
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|
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/* There should be one of more OPP defined */
|
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if (WARN_ON(!count))
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return -ENOENT;
|
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|
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mutex_lock(&opp_table_lock);
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|
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opp_table = _find_opp_table(dev);
|
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if (WARN_ON(IS_ERR(opp_table))) {
|
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ret = PTR_ERR(opp_table);
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mutex_unlock(&opp_table_lock);
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goto free_table;
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}
|
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|
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opp_table->np = opp_np;
|
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opp_table->shared_opp = of_property_read_bool(opp_np, "opp-shared");
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mutex_unlock(&opp_table_lock);
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return 0;
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free_table:
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dev_pm_opp_of_remove_table(dev);
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|
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return ret;
|
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}
|
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|
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/* Initializes OPP tables based on old-deprecated bindings */
|
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static int _of_add_opp_table_v1(struct device *dev)
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{
|
||||
const struct property *prop;
|
||||
const __be32 *val;
|
||||
int nr;
|
||||
|
||||
prop = of_find_property(dev->of_node, "operating-points", NULL);
|
||||
if (!prop)
|
||||
return -ENODEV;
|
||||
if (!prop->value)
|
||||
return -ENODATA;
|
||||
|
||||
/*
|
||||
* Each OPP is a set of tuples consisting of frequency and
|
||||
* voltage like <freq-kHz vol-uV>.
|
||||
*/
|
||||
nr = prop->length / sizeof(u32);
|
||||
if (nr % 2) {
|
||||
dev_err(dev, "%s: Invalid OPP table\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
val = prop->value;
|
||||
while (nr) {
|
||||
unsigned long freq = be32_to_cpup(val++) * 1000;
|
||||
unsigned long volt = be32_to_cpup(val++);
|
||||
|
||||
if (_opp_add_v1(dev, freq, volt, false))
|
||||
dev_warn(dev, "%s: Failed to add OPP %ld\n",
|
||||
__func__, freq);
|
||||
nr -= 2;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_add_table() - Initialize opp table from device tree
|
||||
* @dev: device pointer used to lookup OPP table.
|
||||
*
|
||||
* Register the initial OPP table with the OPP library for given device.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function indirectly uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*
|
||||
* Return:
|
||||
* 0 On success OR
|
||||
* Duplicate OPPs (both freq and volt are same) and opp->available
|
||||
* -EEXIST Freq are same and volt are different OR
|
||||
* Duplicate OPPs (both freq and volt are same) and !opp->available
|
||||
* -ENOMEM Memory allocation failure
|
||||
* -ENODEV when 'operating-points' property is not found or is invalid data
|
||||
* in device node.
|
||||
* -ENODATA when empty 'operating-points' property is found
|
||||
* -EINVAL when invalid entries are found in opp-v2 table
|
||||
*/
|
||||
int dev_pm_opp_of_add_table(struct device *dev)
|
||||
{
|
||||
struct device_node *opp_np;
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* OPPs have two version of bindings now. The older one is deprecated,
|
||||
* try for the new binding first.
|
||||
*/
|
||||
opp_np = _of_get_opp_desc_node(dev);
|
||||
if (!opp_np) {
|
||||
/*
|
||||
* Try old-deprecated bindings for backward compatibility with
|
||||
* older dtbs.
|
||||
*/
|
||||
return _of_add_opp_table_v1(dev);
|
||||
}
|
||||
|
||||
ret = _of_add_opp_table_v2(dev, opp_np);
|
||||
of_node_put(opp_np);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
|
||||
#endif
|
||||
|
||||
@ -18,7 +18,6 @@
|
||||
#include <linux/err.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/export.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include "opp.h"
|
||||
@ -119,8 +118,7 @@ void dev_pm_opp_free_cpufreq_table(struct device *dev,
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
|
||||
#endif /* CONFIG_CPU_FREQ */
|
||||
|
||||
static void
|
||||
_dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of)
|
||||
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of)
|
||||
{
|
||||
struct device *cpu_dev;
|
||||
int cpu;
|
||||
@ -162,145 +160,6 @@ void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_cpumask_remove_table);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
/**
|
||||
* dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask
|
||||
* @cpumask: cpumask for which OPP table needs to be removed
|
||||
*
|
||||
* This removes the OPP tables for CPUs present in the @cpumask.
|
||||
* This should be used only to remove static entries created from DT.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
|
||||
{
|
||||
_dev_pm_opp_cpumask_remove_table(cpumask, true);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table);
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_cpumask_add_table() - Adds OPP table for @cpumask
|
||||
* @cpumask: cpumask for which OPP table needs to be added.
|
||||
*
|
||||
* This adds the OPP tables for CPUs present in the @cpumask.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
|
||||
{
|
||||
struct device *cpu_dev;
|
||||
int cpu, ret = 0;
|
||||
|
||||
WARN_ON(cpumask_empty(cpumask));
|
||||
|
||||
for_each_cpu(cpu, cpumask) {
|
||||
cpu_dev = get_cpu_device(cpu);
|
||||
if (!cpu_dev) {
|
||||
pr_err("%s: failed to get cpu%d device\n", __func__,
|
||||
cpu);
|
||||
continue;
|
||||
}
|
||||
|
||||
ret = dev_pm_opp_of_add_table(cpu_dev);
|
||||
if (ret) {
|
||||
pr_err("%s: couldn't find opp table for cpu:%d, %d\n",
|
||||
__func__, cpu, ret);
|
||||
|
||||
/* Free all other OPPs */
|
||||
dev_pm_opp_of_cpumask_remove_table(cpumask);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_add_table);
|
||||
|
||||
/*
|
||||
* Works only for OPP v2 bindings.
|
||||
*
|
||||
* Returns -ENOENT if operating-points-v2 bindings aren't supported.
|
||||
*/
|
||||
/**
|
||||
* dev_pm_opp_of_get_sharing_cpus() - Get cpumask of CPUs sharing OPPs with
|
||||
* @cpu_dev using operating-points-v2
|
||||
* bindings.
|
||||
*
|
||||
* @cpu_dev: CPU device for which we do this operation
|
||||
* @cpumask: cpumask to update with information of sharing CPUs
|
||||
*
|
||||
* This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev.
|
||||
*
|
||||
* Returns -ENOENT if operating-points-v2 isn't present for @cpu_dev.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
|
||||
{
|
||||
struct device_node *np, *tmp_np;
|
||||
struct device *tcpu_dev;
|
||||
int cpu, ret = 0;
|
||||
|
||||
/* Get OPP descriptor node */
|
||||
np = _of_get_opp_desc_node(cpu_dev);
|
||||
if (!np) {
|
||||
dev_dbg(cpu_dev, "%s: Couldn't find cpu_dev node.\n", __func__);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
cpumask_set_cpu(cpu_dev->id, cpumask);
|
||||
|
||||
/* OPPs are shared ? */
|
||||
if (!of_property_read_bool(np, "opp-shared"))
|
||||
goto put_cpu_node;
|
||||
|
||||
for_each_possible_cpu(cpu) {
|
||||
if (cpu == cpu_dev->id)
|
||||
continue;
|
||||
|
||||
tcpu_dev = get_cpu_device(cpu);
|
||||
if (!tcpu_dev) {
|
||||
dev_err(cpu_dev, "%s: failed to get cpu%d device\n",
|
||||
__func__, cpu);
|
||||
ret = -ENODEV;
|
||||
goto put_cpu_node;
|
||||
}
|
||||
|
||||
/* Get OPP descriptor node */
|
||||
tmp_np = _of_get_opp_desc_node(tcpu_dev);
|
||||
if (!tmp_np) {
|
||||
dev_err(tcpu_dev, "%s: Couldn't find tcpu_dev node.\n",
|
||||
__func__);
|
||||
ret = -ENOENT;
|
||||
goto put_cpu_node;
|
||||
}
|
||||
|
||||
/* CPUs are sharing opp node */
|
||||
if (np == tmp_np)
|
||||
cpumask_set_cpu(cpu, cpumask);
|
||||
|
||||
of_node_put(tmp_np);
|
||||
}
|
||||
|
||||
put_cpu_node:
|
||||
of_node_put(np);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_sharing_cpus);
|
||||
#endif
|
||||
|
||||
/**
|
||||
* dev_pm_opp_set_sharing_cpus() - Mark OPP table as shared by few CPUs
|
||||
* @cpu_dev: CPU device for which we do this operation
|
||||
|
||||
591
drivers/base/power/opp/of.c
Normal file
591
drivers/base/power/opp/of.c
Normal file
@ -0,0 +1,591 @@
|
||||
/*
|
||||
* Generic OPP OF helpers
|
||||
*
|
||||
* Copyright (C) 2009-2010 Texas Instruments Incorporated.
|
||||
* Nishanth Menon
|
||||
* Romit Dasgupta
|
||||
* Kevin Hilman
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
|
||||
#include <linux/cpu.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/export.h>
|
||||
|
||||
#include "opp.h"
|
||||
|
||||
static struct opp_table *_managed_opp(const struct device_node *np)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
|
||||
list_for_each_entry_rcu(opp_table, &opp_tables, node) {
|
||||
if (opp_table->np == np) {
|
||||
/*
|
||||
* Multiple devices can point to the same OPP table and
|
||||
* so will have same node-pointer, np.
|
||||
*
|
||||
* But the OPPs will be considered as shared only if the
|
||||
* OPP table contains a "opp-shared" property.
|
||||
*/
|
||||
return opp_table->shared_opp ? opp_table : NULL;
|
||||
}
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev)
|
||||
{
|
||||
struct device_node *np;
|
||||
|
||||
/*
|
||||
* Only required for backward compatibility with v1 bindings, but isn't
|
||||
* harmful for other cases. And so we do it unconditionally.
|
||||
*/
|
||||
np = of_node_get(dev->of_node);
|
||||
if (np) {
|
||||
u32 val;
|
||||
|
||||
if (!of_property_read_u32(np, "clock-latency", &val))
|
||||
opp_table->clock_latency_ns_max = val;
|
||||
of_property_read_u32(np, "voltage-tolerance",
|
||||
&opp_table->voltage_tolerance_v1);
|
||||
of_node_put(np);
|
||||
}
|
||||
}
|
||||
|
||||
static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
|
||||
struct device_node *np)
|
||||
{
|
||||
unsigned int count = opp_table->supported_hw_count;
|
||||
u32 version;
|
||||
int ret;
|
||||
|
||||
if (!opp_table->supported_hw)
|
||||
return true;
|
||||
|
||||
while (count--) {
|
||||
ret = of_property_read_u32_index(np, "opp-supported-hw", count,
|
||||
&version);
|
||||
if (ret) {
|
||||
dev_warn(dev, "%s: failed to read opp-supported-hw property at index %d: %d\n",
|
||||
__func__, count, ret);
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Both of these are bitwise masks of the versions */
|
||||
if (!(version & opp_table->supported_hw[count]))
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/* TODO: Support multiple regulators */
|
||||
static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
|
||||
struct opp_table *opp_table)
|
||||
{
|
||||
u32 microvolt[3] = {0};
|
||||
u32 val;
|
||||
int count, ret;
|
||||
struct property *prop = NULL;
|
||||
char name[NAME_MAX];
|
||||
|
||||
/* Search for "opp-microvolt-<name>" */
|
||||
if (opp_table->prop_name) {
|
||||
snprintf(name, sizeof(name), "opp-microvolt-%s",
|
||||
opp_table->prop_name);
|
||||
prop = of_find_property(opp->np, name, NULL);
|
||||
}
|
||||
|
||||
if (!prop) {
|
||||
/* Search for "opp-microvolt" */
|
||||
sprintf(name, "opp-microvolt");
|
||||
prop = of_find_property(opp->np, name, NULL);
|
||||
|
||||
/* Missing property isn't a problem, but an invalid entry is */
|
||||
if (!prop)
|
||||
return 0;
|
||||
}
|
||||
|
||||
count = of_property_count_u32_elems(opp->np, name);
|
||||
if (count < 0) {
|
||||
dev_err(dev, "%s: Invalid %s property (%d)\n",
|
||||
__func__, name, count);
|
||||
return count;
|
||||
}
|
||||
|
||||
/* There can be one or three elements here */
|
||||
if (count != 1 && count != 3) {
|
||||
dev_err(dev, "%s: Invalid number of elements in %s property (%d)\n",
|
||||
__func__, name, count);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = of_property_read_u32_array(opp->np, name, microvolt, count);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: error parsing %s: %d\n", __func__, name, ret);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
opp->u_volt = microvolt[0];
|
||||
|
||||
if (count == 1) {
|
||||
opp->u_volt_min = opp->u_volt;
|
||||
opp->u_volt_max = opp->u_volt;
|
||||
} else {
|
||||
opp->u_volt_min = microvolt[1];
|
||||
opp->u_volt_max = microvolt[2];
|
||||
}
|
||||
|
||||
/* Search for "opp-microamp-<name>" */
|
||||
prop = NULL;
|
||||
if (opp_table->prop_name) {
|
||||
snprintf(name, sizeof(name), "opp-microamp-%s",
|
||||
opp_table->prop_name);
|
||||
prop = of_find_property(opp->np, name, NULL);
|
||||
}
|
||||
|
||||
if (!prop) {
|
||||
/* Search for "opp-microamp" */
|
||||
sprintf(name, "opp-microamp");
|
||||
prop = of_find_property(opp->np, name, NULL);
|
||||
}
|
||||
|
||||
if (prop && !of_property_read_u32(opp->np, name, &val))
|
||||
opp->u_amp = val;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT
|
||||
* entries
|
||||
* @dev: device pointer used to lookup OPP table.
|
||||
*
|
||||
* Free OPPs created using static entries present in DT.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function indirectly uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void dev_pm_opp_of_remove_table(struct device *dev)
|
||||
{
|
||||
_dev_pm_opp_remove_table(dev, false);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
|
||||
|
||||
/* Returns opp descriptor node for a device, caller must do of_node_put() */
|
||||
struct device_node *_of_get_opp_desc_node(struct device *dev)
|
||||
{
|
||||
/*
|
||||
* TODO: Support for multiple OPP tables.
|
||||
*
|
||||
* There should be only ONE phandle present in "operating-points-v2"
|
||||
* property.
|
||||
*/
|
||||
|
||||
return of_parse_phandle(dev->of_node, "operating-points-v2", 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings)
|
||||
* @dev: device for which we do this operation
|
||||
* @np: device node
|
||||
*
|
||||
* This function adds an opp definition to the opp table and returns status. The
|
||||
* opp can be controlled using dev_pm_opp_enable/disable functions and may be
|
||||
* removed by dev_pm_opp_remove.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*
|
||||
* Return:
|
||||
* 0 On success OR
|
||||
* Duplicate OPPs (both freq and volt are same) and opp->available
|
||||
* -EEXIST Freq are same and volt are different OR
|
||||
* Duplicate OPPs (both freq and volt are same) and !opp->available
|
||||
* -ENOMEM Memory allocation failure
|
||||
* -EINVAL Failed parsing the OPP node
|
||||
*/
|
||||
static int _opp_add_static_v2(struct device *dev, struct device_node *np)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
struct dev_pm_opp *new_opp;
|
||||
u64 rate;
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
/* Hold our table modification lock here */
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
new_opp = _allocate_opp(dev, &opp_table);
|
||||
if (!new_opp) {
|
||||
ret = -ENOMEM;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
ret = of_property_read_u64(np, "opp-hz", &rate);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "%s: opp-hz not found\n", __func__);
|
||||
goto free_opp;
|
||||
}
|
||||
|
||||
/* Check if the OPP supports hardware's hierarchy of versions or not */
|
||||
if (!_opp_is_supported(dev, opp_table, np)) {
|
||||
dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate);
|
||||
goto free_opp;
|
||||
}
|
||||
|
||||
/*
|
||||
* Rate is defined as an unsigned long in clk API, and so casting
|
||||
* explicitly to its type. Must be fixed once rate is 64 bit
|
||||
* guaranteed in clk API.
|
||||
*/
|
||||
new_opp->rate = (unsigned long)rate;
|
||||
new_opp->turbo = of_property_read_bool(np, "turbo-mode");
|
||||
|
||||
new_opp->np = np;
|
||||
new_opp->dynamic = false;
|
||||
new_opp->available = true;
|
||||
|
||||
if (!of_property_read_u32(np, "clock-latency-ns", &val))
|
||||
new_opp->clock_latency_ns = val;
|
||||
|
||||
ret = opp_parse_supplies(new_opp, dev, opp_table);
|
||||
if (ret)
|
||||
goto free_opp;
|
||||
|
||||
ret = _opp_add(dev, new_opp, opp_table);
|
||||
if (ret)
|
||||
goto free_opp;
|
||||
|
||||
/* OPP to select on device suspend */
|
||||
if (of_property_read_bool(np, "opp-suspend")) {
|
||||
if (opp_table->suspend_opp) {
|
||||
dev_warn(dev, "%s: Multiple suspend OPPs found (%lu %lu)\n",
|
||||
__func__, opp_table->suspend_opp->rate,
|
||||
new_opp->rate);
|
||||
} else {
|
||||
new_opp->suspend = true;
|
||||
opp_table->suspend_opp = new_opp;
|
||||
}
|
||||
}
|
||||
|
||||
if (new_opp->clock_latency_ns > opp_table->clock_latency_ns_max)
|
||||
opp_table->clock_latency_ns_max = new_opp->clock_latency_ns;
|
||||
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
|
||||
__func__, new_opp->turbo, new_opp->rate, new_opp->u_volt,
|
||||
new_opp->u_volt_min, new_opp->u_volt_max,
|
||||
new_opp->clock_latency_ns);
|
||||
|
||||
/*
|
||||
* Notify the changes in the availability of the operable
|
||||
* frequency/voltage list.
|
||||
*/
|
||||
srcu_notifier_call_chain(&opp_table->srcu_head, OPP_EVENT_ADD, new_opp);
|
||||
return 0;
|
||||
|
||||
free_opp:
|
||||
_opp_remove(opp_table, new_opp, false);
|
||||
unlock:
|
||||
mutex_unlock(&opp_table_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Initializes OPP tables based on new bindings */
|
||||
static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
|
||||
{
|
||||
struct device_node *np;
|
||||
struct opp_table *opp_table;
|
||||
int ret = 0, count = 0;
|
||||
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
opp_table = _managed_opp(opp_np);
|
||||
if (opp_table) {
|
||||
/* OPPs are already managed */
|
||||
if (!_add_opp_dev(dev, opp_table))
|
||||
ret = -ENOMEM;
|
||||
mutex_unlock(&opp_table_lock);
|
||||
return ret;
|
||||
}
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
/* We have opp-table node now, iterate over it and add OPPs */
|
||||
for_each_available_child_of_node(opp_np, np) {
|
||||
count++;
|
||||
|
||||
ret = _opp_add_static_v2(dev, np);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: Failed to add OPP, %d\n", __func__,
|
||||
ret);
|
||||
goto free_table;
|
||||
}
|
||||
}
|
||||
|
||||
/* There should be one of more OPP defined */
|
||||
if (WARN_ON(!count))
|
||||
return -ENOENT;
|
||||
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
opp_table = _find_opp_table(dev);
|
||||
if (WARN_ON(IS_ERR(opp_table))) {
|
||||
ret = PTR_ERR(opp_table);
|
||||
mutex_unlock(&opp_table_lock);
|
||||
goto free_table;
|
||||
}
|
||||
|
||||
opp_table->np = opp_np;
|
||||
opp_table->shared_opp = of_property_read_bool(opp_np, "opp-shared");
|
||||
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
return 0;
|
||||
|
||||
free_table:
|
||||
dev_pm_opp_of_remove_table(dev);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Initializes OPP tables based on old-deprecated bindings */
|
||||
static int _of_add_opp_table_v1(struct device *dev)
|
||||
{
|
||||
const struct property *prop;
|
||||
const __be32 *val;
|
||||
int nr;
|
||||
|
||||
prop = of_find_property(dev->of_node, "operating-points", NULL);
|
||||
if (!prop)
|
||||
return -ENODEV;
|
||||
if (!prop->value)
|
||||
return -ENODATA;
|
||||
|
||||
/*
|
||||
* Each OPP is a set of tuples consisting of frequency and
|
||||
* voltage like <freq-kHz vol-uV>.
|
||||
*/
|
||||
nr = prop->length / sizeof(u32);
|
||||
if (nr % 2) {
|
||||
dev_err(dev, "%s: Invalid OPP table\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
val = prop->value;
|
||||
while (nr) {
|
||||
unsigned long freq = be32_to_cpup(val++) * 1000;
|
||||
unsigned long volt = be32_to_cpup(val++);
|
||||
|
||||
if (_opp_add_v1(dev, freq, volt, false))
|
||||
dev_warn(dev, "%s: Failed to add OPP %ld\n",
|
||||
__func__, freq);
|
||||
nr -= 2;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_add_table() - Initialize opp table from device tree
|
||||
* @dev: device pointer used to lookup OPP table.
|
||||
*
|
||||
* Register the initial OPP table with the OPP library for given device.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function indirectly uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*
|
||||
* Return:
|
||||
* 0 On success OR
|
||||
* Duplicate OPPs (both freq and volt are same) and opp->available
|
||||
* -EEXIST Freq are same and volt are different OR
|
||||
* Duplicate OPPs (both freq and volt are same) and !opp->available
|
||||
* -ENOMEM Memory allocation failure
|
||||
* -ENODEV when 'operating-points' property is not found or is invalid data
|
||||
* in device node.
|
||||
* -ENODATA when empty 'operating-points' property is found
|
||||
* -EINVAL when invalid entries are found in opp-v2 table
|
||||
*/
|
||||
int dev_pm_opp_of_add_table(struct device *dev)
|
||||
{
|
||||
struct device_node *opp_np;
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* OPPs have two version of bindings now. The older one is deprecated,
|
||||
* try for the new binding first.
|
||||
*/
|
||||
opp_np = _of_get_opp_desc_node(dev);
|
||||
if (!opp_np) {
|
||||
/*
|
||||
* Try old-deprecated bindings for backward compatibility with
|
||||
* older dtbs.
|
||||
*/
|
||||
return _of_add_opp_table_v1(dev);
|
||||
}
|
||||
|
||||
ret = _of_add_opp_table_v2(dev, opp_np);
|
||||
of_node_put(opp_np);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
|
||||
|
||||
/* CPU device specific helpers */
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask
|
||||
* @cpumask: cpumask for which OPP table needs to be removed
|
||||
*
|
||||
* This removes the OPP tables for CPUs present in the @cpumask.
|
||||
* This should be used only to remove static entries created from DT.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
|
||||
{
|
||||
_dev_pm_opp_cpumask_remove_table(cpumask, true);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table);
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_cpumask_add_table() - Adds OPP table for @cpumask
|
||||
* @cpumask: cpumask for which OPP table needs to be added.
|
||||
*
|
||||
* This adds the OPP tables for CPUs present in the @cpumask.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
|
||||
{
|
||||
struct device *cpu_dev;
|
||||
int cpu, ret = 0;
|
||||
|
||||
WARN_ON(cpumask_empty(cpumask));
|
||||
|
||||
for_each_cpu(cpu, cpumask) {
|
||||
cpu_dev = get_cpu_device(cpu);
|
||||
if (!cpu_dev) {
|
||||
pr_err("%s: failed to get cpu%d device\n", __func__,
|
||||
cpu);
|
||||
continue;
|
||||
}
|
||||
|
||||
ret = dev_pm_opp_of_add_table(cpu_dev);
|
||||
if (ret) {
|
||||
pr_err("%s: couldn't find opp table for cpu:%d, %d\n",
|
||||
__func__, cpu, ret);
|
||||
|
||||
/* Free all other OPPs */
|
||||
dev_pm_opp_of_cpumask_remove_table(cpumask);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_add_table);
|
||||
|
||||
/*
|
||||
* Works only for OPP v2 bindings.
|
||||
*
|
||||
* Returns -ENOENT if operating-points-v2 bindings aren't supported.
|
||||
*/
|
||||
/**
|
||||
* dev_pm_opp_of_get_sharing_cpus() - Get cpumask of CPUs sharing OPPs with
|
||||
* @cpu_dev using operating-points-v2
|
||||
* bindings.
|
||||
*
|
||||
* @cpu_dev: CPU device for which we do this operation
|
||||
* @cpumask: cpumask to update with information of sharing CPUs
|
||||
*
|
||||
* This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev.
|
||||
*
|
||||
* Returns -ENOENT if operating-points-v2 isn't present for @cpu_dev.
|
||||
*
|
||||
* Locking: The internal opp_table and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
|
||||
struct cpumask *cpumask)
|
||||
{
|
||||
struct device_node *np, *tmp_np;
|
||||
struct device *tcpu_dev;
|
||||
int cpu, ret = 0;
|
||||
|
||||
/* Get OPP descriptor node */
|
||||
np = _of_get_opp_desc_node(cpu_dev);
|
||||
if (!np) {
|
||||
dev_dbg(cpu_dev, "%s: Couldn't find cpu_dev node.\n", __func__);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
cpumask_set_cpu(cpu_dev->id, cpumask);
|
||||
|
||||
/* OPPs are shared ? */
|
||||
if (!of_property_read_bool(np, "opp-shared"))
|
||||
goto put_cpu_node;
|
||||
|
||||
for_each_possible_cpu(cpu) {
|
||||
if (cpu == cpu_dev->id)
|
||||
continue;
|
||||
|
||||
tcpu_dev = get_cpu_device(cpu);
|
||||
if (!tcpu_dev) {
|
||||
dev_err(cpu_dev, "%s: failed to get cpu%d device\n",
|
||||
__func__, cpu);
|
||||
ret = -ENODEV;
|
||||
goto put_cpu_node;
|
||||
}
|
||||
|
||||
/* Get OPP descriptor node */
|
||||
tmp_np = _of_get_opp_desc_node(tcpu_dev);
|
||||
if (!tmp_np) {
|
||||
dev_err(tcpu_dev, "%s: Couldn't find tcpu_dev node.\n",
|
||||
__func__);
|
||||
ret = -ENOENT;
|
||||
goto put_cpu_node;
|
||||
}
|
||||
|
||||
/* CPUs are sharing opp node */
|
||||
if (np == tmp_np)
|
||||
cpumask_set_cpu(cpu, cpumask);
|
||||
|
||||
of_node_put(tmp_np);
|
||||
}
|
||||
|
||||
put_cpu_node:
|
||||
of_node_put(np);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_sharing_cpus);
|
||||
@ -28,6 +28,8 @@ struct regulator;
|
||||
/* Lock to allow exclusive modification to the device and opp lists */
|
||||
extern struct mutex opp_table_lock;
|
||||
|
||||
extern struct list_head opp_tables;
|
||||
|
||||
/*
|
||||
* Internal data structure organization with the OPP layer library is as
|
||||
* follows:
|
||||
@ -183,6 +185,18 @@ struct opp_table {
|
||||
struct opp_table *_find_opp_table(struct device *dev);
|
||||
struct opp_device *_add_opp_dev(const struct device *dev, struct opp_table *opp_table);
|
||||
struct device_node *_of_get_opp_desc_node(struct device *dev);
|
||||
void _dev_pm_opp_remove_table(struct device *dev, bool remove_all);
|
||||
struct dev_pm_opp *_allocate_opp(struct device *dev, struct opp_table **opp_table);
|
||||
int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table);
|
||||
void _opp_remove(struct opp_table *opp_table, struct dev_pm_opp *opp, bool notify);
|
||||
int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt, bool dynamic);
|
||||
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev);
|
||||
#else
|
||||
static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev) {}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
void opp_debug_remove_one(struct dev_pm_opp *opp);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user