Commit Graph

34 Commits

Author SHA1 Message Date
Gustavo A. R. Silva
2e6424ab85 pinctrl: amd: fix error return code in amd_gpio_probe()
platform_get_irq() returns an error code, but the pinctrl-amd driver
ignores it and always returns -EINVAL. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.

Print and propagate the return value of platform_get_irq on failure.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-22 14:24:37 +02:00
Linus Walleij
6183061967 Linux 4.12-rc7
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Merge tag 'v4.12-rc7' into devel

Linux 4.12-rc7
2017-06-29 14:27:39 +02:00
Thomas Gleixner
ba714a9c1d pinctrl/amd: Use regular interrupt instead of chained
The AMD pinctrl driver uses a chained interrupt to demultiplex the GPIO
interrupts. Kevin Vandeventer reported, that his new AMD Ryzen locks up
hard on boot when the AMD pinctrl driver is initialized. The reason is an
interrupt storm. It's not clear whether that's caused by hardware or
firmware or both.

Using chained interrupts on X86 is a dangerous endavour. If a system is
misconfigured or the hardware buggy there is no safety net to catch an
interrupt storm.

Convert the driver to use a regular interrupt for the demultiplex
handler. This allows the interrupt storm detector to catch the malfunction
and lets the system boot up.

This should be backported to stable because it's likely that more users run
into this problem as the AMD Ryzen machines are spreading.

Reported-by: Kevin Vandeventer
Link: https://bugzilla.suse.com/show_bug.cgi?id=1034261
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-06-09 10:51:54 +02:00
Shyam Sundar S K
add7bfceac pinctrl/amd: Update contact information for AMD pinctrl/amd
Updating the point of contact for AMD GPIO driver.

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Nehal Shah <Nehal-bakulchandra.Shah@amd.com>
Cc: Ken Xue <Ken.Xue@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-05-22 10:39:24 +02:00
Linus Torvalds
89c9fea3c8 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  tty: fix comment for __tty_alloc_driver()
  init/main: properly align the multi-line comment
  init/main: Fix double "the" in comment
  Fix dead URLs to ftp.kernel.org
  drivers: Clean up duplicated email address
  treewide: Fix typo in xml/driver-api/basics.xml
  tools/testing/selftests/powerpc: remove redundant CFLAGS in Makefile: "-Wall -O2 -Wall" -> "-O2 -Wall"
  selftests/timers: Spelling s/privledges/privileges/
  HID: picoLCD: Spelling s/REPORT_WRTIE_MEMORY/REPORT_WRITE_MEMORY/
  net: phy: dp83848: Fix Typo
  UBI: Fix typos
  Documentation: ftrace.txt: Correct nice value of 120 priority
  net: fec: Fix typo in error msg and comment
  treewide: Fix typos in printk
2017-05-02 19:09:35 -07:00
Masanari Iida
0a95160ed3 treewide: Fix typos in printk
This patch fix some spelling typos found in printk.

[jkosina@suse.cz: drop arch/arm64/kernel/hibernate.c that was already
 in place]
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2017-03-24 15:24:00 +01:00
Julia Cartwright
229710fecd pinctrl: amd: make use of raw_spinlock variants
The amd pinctrl drivers currently implement an irq_chip for handling
interrupts; due to how irq_chip handling is done, it's necessary for the
irq_chip methods to be invoked from hardirq context, even on a a
real-time kernel.  Because the spinlock_t type becomes a "sleeping"
spinlock w/ RT kernels, it is not suitable to be used with irq_chips.

A quick audit of the operations under the lock reveal that they do only
minimal, bounded work, and are therefore safe to do under a raw spinlock.

Signed-off-by: Julia Cartwright <julia@ni.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-03-16 16:39:15 +01:00
Linus Walleij
7f36f5d11c Linux 4.10-rc6
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Merge tag 'v4.10-rc6' into devel

Linux 4.10-rc6

Resolved conflicts in:
	drivers/pinctrl/pinctrl-amd.c
	drivers/pinctrl/samsung/pinctrl-exynos.c
2017-01-30 14:39:20 +01:00
Linus Walleij
27a2873617 Merge branch 'ib-pinctrl-genprops' into devel 2017-01-26 15:27:54 +01:00
Mika Westerberg
2956b5d94a pinctrl / gpio: Introduce .set_config() callback for GPIO chips
Currently we already have two pin configuration related callbacks
available for GPIO chips .set_single_ended() and .set_debounce(). In
future we expect to have even more, which does not scale well if we need
to add yet another callback to the GPIO chip structure for each possible
configuration parameter.

Better solution is to reuse what we already have available in the
generic pinconf.

To support this, we introduce a new .set_config() callback for GPIO
chips. The callback takes a single packed pin configuration value as
parameter. This can then be extended easily beyond what is currently
supported by just adding new types to the generic pinconf enum.

If the GPIO driver is backed up by a pinctrl driver the GPIO driver can
just assign gpiochip_generic_config() (introduced in this patch) to
.set_config and that will take care configuration requests are directed
to the pinctrl driver.

We then convert the existing drivers over .set_config() and finally
remove the .set_single_ended() and .set_debounce() callbacks.

Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-01-26 15:27:37 +01:00
Wei Yongjun
8dca4a41f1 pinctrl/amd: Drop pinctrl_unregister for devm_ registered device
It's not necessary to unregister pin controller device registered
with devm_pinctrl_register() and using pinctrl_unregister() leads
to a double free.

Fixes: 3bfd44306c ("pinctrl: amd: Add support for additional GPIO")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-01-19 00:15:09 +01:00
Arnd Bergmann
581d3c2025 pinctrl: amd: avoid maybe-uninitalized warning
Since gpio_dev->hwbank_num is now a variable, the compiler cannot
figure out if pin_num is initialized at all:

drivers/pinctrl/pinctrl-amd.c: In function 'amd_gpio_dbg_show':
drivers/pinctrl/pinctrl-amd.c:210:3: warning: 'pin_num' may be used uninitialized in this function [-Wmaybe-uninitialized]
   for (; i < pin_num; i++) {
   ^~~
drivers/pinctrl/pinctrl-amd.c:172:21: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]

This adds a 'default' statement to make that case well-defined.

Fixes: 3bfd44306c ("pinctrl: amd: Add support for additional GPIO")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-01-12 08:49:12 +01:00
Dan Carpenter
3775dac1bc pinctrl/amd: white space cleanups in amd_gpio_dbg_show()
We accidentally deleted two tabs from the first line, but even with that
fixed the conditions were not really kernel style.  Put the && at the
end of the line so we can align the condition clauses.  Also add spaces
around the "+" operator.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-01-11 14:40:37 +01:00
Linus Walleij
6ac4c1ad2e pinctrl: amd: fix compilation warning
3bfd44306c ("pinctrl: amd: Add support for additional GPIO")
created the following warning:

drivers/pinctrl/pinctrl-amd.c: In function 'amd_gpio_dbg_show':
drivers/pinctrl/pinctrl-amd.c:210:3: warning: 'pin_num' may be used uninitialized in this function [-Wmaybe-uninitialized]
   for (; i < pin_num; i++) {
   ^
drivers/pinctrl/pinctrl-amd.c:172:21: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
  unsigned int bank, i, pin_num;
                     ^
Fix this by adding a guarding default case for illegal
bank numbers.

Cc: S-k Shyam-sundar <Shyam-sundar.S-k@amd.com>
Cc: Nehal Shah <Nehal-bakulchandra.Shah@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-01-03 09:26:21 +01:00
Shyam Sundar S K
2983f296f2 pinctrl/amd: Set the level based on ACPI tables
In the function amd_gpio_irq_set_type, read the values from
the ACPI table to set the level and drop the settings passed
by the client.

Cc: <stable@vger.kernel.org> # 4.8.x+
Reviewed-by: Pankaj Sen <Pankaj.Sen@amd.com>
Reviewed-by: Nitesh Kumar Agrawal <Nitesh-kumar.Agrawal@amd.com>
Reviewed-by: Shah, Nehal-bakulchandra <Nehal-bakulchandra.Shah@amd.com>
Signed-off-by: Shyam-sundar S-k <Shyam-sundar.S-k@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-12-29 21:04:44 +01:00
Shah, Nehal-bakulchandra
3bfd44306c pinctrl: amd: Add support for additional GPIO
This patch adds support for new Bank and adds IRQCHIP_SKIP_SET_WAKE flag.

Reviewed-by: S-k, Shyam-sundar <Shyam-sundar.S-k@amd.com>
Signed-off-by: Nehal Shah <Nehal-bakulchandra.Shah@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-12-28 13:26:09 +01:00
Linus Walleij
0565f49cfe Linux 4.8-rc6
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Merge tag 'v4.8-rc6' into devel

Linux 4.8-rc6
2016-09-23 14:57:16 +02:00
Agrawal, Nitesh-kumar
e084448b5d pinctrl/amd: switch to using a bool for level
The earlier patch can be simplified by using a bool
to indicate level trigger.

Reviewed-by: Pankaj Sen <Pankaj.Sen@amd.com>
Signed-off-by: Nitesh Kumar Agrawal <Nitesh-kumar.Agrawal@amd.com>
[Fixup to earlier manually applied patch]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-09-13 10:24:37 +02:00
Agrawal, Nitesh-kumar
499c7196dd pinctrl/amd: Configure GPIO register using BIOS settings
In the function amd_gpio_irq_set_type, use the settings provided by
the BIOS,when the LevelTrig is Edge and activeLevel is HIGH, to configure
the GPIO registers. Ignore the settings from client.

Reviewed-by: Pankaj Sen <Pankaj.Sen@amd.com>
Signed-off-by:Nitesh Kumar Agrawal <Nitesh-kumar.Agrawal@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-09-07 21:48:16 +02:00
Agrawal, Nitesh-kumar
8cf4345575 pinctrl/amd: Remove the default de-bounce time
In the function amd_gpio_irq_enable() and
amd_gpio_direction_input(), remove the code which is setting
the default de-bounce time to 2.75ms.

The driver code shall use the same settings as specified in
BIOS. Any default assignment impacts TouchPad behaviour when
the LevelTrig is set to EDGE FALLING.

Cc: stable@vger.kernel.org
Reviewed-by:  Ken Xue <Ken.Xue@amd.com>
Signed-off-by: Nitesh Kumar Agrawal <Nitesh-kumar.Agrawal@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-08-10 15:45:54 +02:00
Laxman Dewangan
251e22abde pinctrl: amd: Use devm_pinctrl_register() for pinctrl registration
Use devm_pinctrl_register() for pin control registration and clean
error path.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-04-21 09:23:21 +02:00
Irina Tirdea
d32f7fd3bb pinctrl: Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map
Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map, since
it does not depend on device tree despite the current name. This
will enforce a consistent naming in pinctr-utils.c and will make
it clear it can be called from outside device tree (e.g. from
ACPI handling code).

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-04-01 15:06:36 +02:00
Wang Hongcheng
42a44402ec pinctrl: amd:Add device HID for future AMD GPIO controller
Add device HID AMDI0030 to match the AMD ACPI Vendor ID (AMDI) as
registered in http://www.uefi.org/acpi_id_list, and the GPIO controller
on future AMD paltform will use the HID instead of AMD0030.

Signed-off-by: Wang Hongcheng <annie.wang@amd.com>
Acked-by: Ken Xue <ken.Xue@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-03-31 10:18:51 +02:00
Wei Yongjun
424a6c607c pinctrl: Fix return value check in amd_gpio_probe()
In case of error, the function devm_ioremap_nocache() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-02-15 19:42:41 +01:00
Linus Walleij
04d3672311 pinctrl: amd: use gpiochip data pointer
This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: Ken Xue <Ken.Xue@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-01-05 14:14:52 +01:00
Linus Walleij
58383c7842 gpio: change member .dev to .parent
The name .dev in a struct is normally reserved for a struct device
that is let us say a superclass to the thing described by the struct.
struct gpio_chip stands out by confusingly using a struct device *dev
to point to the parent device (such as a platform_device) that
represents the hardware. As we want to give gpio_chip:s real devices,
this is not working. We need to rename this member to parent.

This was done by two coccinelle scripts, I guess it is possible to
combine them into one, but I don't know such stuff. They look like
this:

@@
struct gpio_chip *var;
@@
-var->dev
+var->parent

and:

@@
struct gpio_chip var;
@@
-var.dev
+var.parent

and:

@@
struct bgpio_chip *var;
@@
-var->gc.dev
+var->gc.parent

Plus a few instances of bgpio that I couldn't figure out how
to teach Coccinelle to rewrite.

This patch hits all over the place, but I *strongly* prefer this
solution to any piecemal approaches that just exercise patch
mechanics all over the place. It mainly hits drivers/gpio and
drivers/pinctrl which is my own backyard anyway.

Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Alek Du <alek.du@intel.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-11-19 09:24:35 +01:00
Thomas Gleixner
bd0b9ac405 genirq: Remove irq argument from irq flow handlers
Most interrupt flow handlers do not use the irq argument. Those few
which use it can retrieve the irq number from the irq descriptor.

Remove the argument.

Search and replace was done with coccinelle and some extra helper
scripts around it. Thanks to Julia for her help!

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
2015-09-16 15:47:51 +02:00
Thomas Gleixner
fa00fecc16 pinctrl/amd: Prepare amd_gpio_irq_handler for irq argument removal
The irq argument of most interrupt flow handlers is unused or merily
used instead of a local variable. The handlers which need the irq
argument can retrieve the irq number from the irq descriptor.

Search and update was done with coccinelle and the invaluable help of
Julia Lawall.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
2015-07-17 21:56:20 +02:00
Jiang Liu
5663bb27de pinctrl: Use irq_desc_get_xxx() to avoid redundant lookup of irq_desc
Use irq_desc_get_xxx() to avoid redundant lookup of irq_desc while we
already have a pointer to corresponding irq_desc.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-17 21:56:20 +02:00
Thomas Gleixner
9d8293147e pinctrl/amd: Use irq_set_handler_locked()
Use irq_set_handler_locked() as it avoids a redundant lookup of the
irq descriptor.

Search and replacement was done with coccinelle.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
2015-07-17 21:56:18 +02:00
Masahiro Yamada
323de9efdf pinctrl: make pinctrl_register() return proper error code
Currently, pinctrl_register() just returns NULL on error, so the
callers can not know the exact reason of the failure.

Some of the pinctrl drivers return -EINVAL, some -ENODEV, and some
-ENOMEM on error of pinctrl_register(), although the error code
might be different from the real cause of the error.

This commit reworks pinctrl_register() to return the appropriate
error code and modifies all of the pinctrl drivers to use IS_ERR()
for the error checking and PTR_ERR() for getting the error code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Lee Jones <lee@kernel.org>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Ray Jui <rjui@broadcom.com>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Acked-by: Wei Chen <Wei.Chen@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-06-10 14:49:52 +02:00
Fabio Estevam
3944e7b78c pinctrl: Remove .owner field
platform_driver does not need to set the owner field, as it will be
populated by the driver core, so just remove it.

The semantic patch that makes this change is available
in scripts/coccinelle/api/platform_no_drv_owner.cocci.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-06-04 10:12:42 +02:00
Ken Xue
25a853d037 Fix inconsistent spinlock of AMD GPIO driver which can be
recognized by static analysis tool smatch. Declare constant
Variables with Sparse's suggestion.

Signed-off-by: Ken Xue <Ken.Xue@amd.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-04-07 11:36:49 +02:00
Ken Xue
dbad75dd1f pinctrl: add AMD GPIO driver support.
KERNCZ GPIO is a new IP from AMD. it can be implemented in both x86 and ARM.
Current driver patch only support GPIO in x86.

Signed-off-by: Ken Xue <Ken.Xue@amd.com>
[Moved back to <linux/gpio.h> header]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-03-18 02:02:21 +01:00