Commit Graph

86 Commits

Author SHA1 Message Date
Alexander Stein 7d3a3fe648 pinctrl: at91: Merge clk_prepare and clk_enable into clk_prepare_enable
This simplifies the normal as well as the error path.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-05-02 13:53:07 +02:00
Alexander Stein 234b6513fc pinctrl: at91: Make at91_gpio_template const
This template is only assigned, so make it const.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-05-02 13:52:04 +02:00
Laxman Dewangan 5c67425a46 pinctrl: at91: Use devm_pinctrl_register() for pinctrl registration
Use devm_pinctrl_register() for pin control registration and remove
the need of .remove callback.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-04-21 09:23:22 +02:00
Linus Torvalds 58cf279aca GPIO bulk updates for the v4.5 kernel cycle:
Infrastructural changes:
 
 - In struct gpio_chip, rename the .dev node to .parent to better reflect
   the fact that this is not the GPIO struct device abstraction. We will
   add that soon so this would be totallt confusing.
 
 - It was noted that the driver .get_value() callbacks was
   sometimes reporting negative -ERR values to the gpiolib core, expecting
   them to be propagated to consumer gpiod_get_value() and gpio_get_value()
   calls. This was not happening, so as there was a mess of drivers
   returning negative errors and some returning "anything else than zero"
   to indicate that a line was active. As some would have bit 31 set to
   indicate "line active" it clashed with negative error codes. This is
   fixed by the largeish series clamping values in all drivers with
   !!value to [0,1] and then augmenting the code to propagate error codes
   to consumers. (Includes some ACKed patches in other subsystems.)
 
 - Add a void *data pointer to struct gpio_chip. The container_of() design
   pattern is indeed very nice, but we want to reform the struct gpio_chip
   to be a non-volative, stateless business, and keep states internal to
   the gpiolib to be able to hold on to the state when adding a proper
   userspace ABI (character device) further down the road. To achieve this,
   drivers need a handle at the internal state that is not dependent on
   their struct gpio_chip() so we add gpiochip_add_data() and
   gpiochip_get_data() following the pattern of many other subsystems.
   All the "use gpiochip data pointer" patches transforms drivers to this
   scheme.
 
 - The Generic GPIO chip header has been merged into the general
   <linux/gpio/driver.h> header, and the custom header for that removed.
   Instead of having a separate mm_gpio_chip struct for these generic
   drivers, merge that into struct gpio_chip, simplifying the code and
   removing the need for separate and confusing includes.
 
 Misc improvements:
 
 - Stabilize the way GPIOs are looked up from the ACPI legacy
   specification.
 
 - Incremental driver features for PXA, PCA953X, Lantiq (patches from the
   OpenWRT community), RCAR, Zynq, PL061, 104-idi-48
 
 New drivers:
 
 - Add a GPIO chip to the ALSA SoC AC97 driver.
 
 - Add a new Broadcom NSP SoC driver (this lands in the pinctrl dir, but
   the branch is merged here too to account for infrastructural changes).
 
 - The sx150x driver now supports the sx1502.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJWmsZhAAoJEEEQszewGV1ztq0QAJ1KbNOpmf/s3INkOH4r771Z
 WIrNEsmwwLIAryo8gKNOM0H1zCwhRUV7hIE5jYWgD6JvjuAN6vobMlZAq21j6YpB
 pKgqnI5DuoND450xjb8wSwGQ5NTYp1rFXNmwCrtyTjOle6AAW+Kp2cvVWxVr77Av
 uJinRuuBr9GOKW/yYM1Fw/6EPjkvvhVOb+LBguRyVvq0s5Peyw7ZVeY1tjgPHJLn
 oSZ9dmPUjHEn91oZQbtfro3plOObcxdgJ8vo//pgEmyhMeR8XjXES+aUfErxqWOU
 PimrZuMMy4cxnsqWwh3Dyxo7KSWfJKfSPRwnGwc/HgbHZEoWxOZI1ezRtGKrRQtj
 vubxp5dUBA5z66TMsOCeJtzKVSofkvgX2Wr/Y9jKp5oy9cHdAZv9+jEHV1pr6asz
 Tas97MmmO77XuRI/GPDqVHx8dfa15OIz9s92+Gu64KxNzVxTo4+NdoPSNxkbCILO
 FKn7EmU3D0OjmN2NJ9GAURoFaj3BBUgNhaxacG9j2bieyh+euuUHRtyh2k8zXR9y
 8OnY1UOrTUYF8YIq9pXZxMQRD/lqwCNHvEjtI6BqMcNx4MptfTL+FKYUkn/SgCYk
 QTNV6Ui+ety5D5aEpp5q0ItGsrDJ2LYSItsS+cOtMy2ieOxbQav9NWwu7eI3l5ly
 gwYTZjG9p9joPXLW0E3g
 =63rR
 -----END PGP SIGNATURE-----

Merge tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "Here is the bulk of GPIO changes for v4.5.

  Notably there are big refactorings mostly by myself, aimed at getting
  the gpio_chip into a shape that makes me believe I can proceed to
  preserve state for a proper userspace ABI (character device) that has
  already been proposed once, but resulted in the feedback that I need
  to go back and restructure stuff.  So I've been restructuring stuff.
  On the way I ran into brokenness (return code from the get_value()
  callback) and had to fix it.  Also, refactored generic GPIO to be
  simpler.

  Some of that is still waiting to trickle down from the subsystems all
  over the kernel that provide random gpio_chips, I've touched every
  single GPIO driver in the kernel now, oh man I didn't know I was
  responsible for so much...

  Apart from that we're churning along as usual.

  I took some effort to test and retest so it should merge nicely and we
  shook out a couple of bugs in -next.

  Infrastructural changes:

   - In struct gpio_chip, rename the .dev node to .parent to better
     reflect the fact that this is not the GPIO struct device
     abstraction.  We will add that soon so this would be totallt
     confusing.

   - It was noted that the driver .get_value() callbacks was sometimes
     reporting negative -ERR values to the gpiolib core, expecting them
     to be propagated to consumer gpiod_get_value() and gpio_get_value()
     calls.  This was not happening, so as there was a mess of drivers
     returning negative errors and some returning "anything else than
     zero" to indicate that a line was active.  As some would have bit
     31 set to indicate "line active" it clashed with negative error
     codes.  This is fixed by the largeish series clamping values in all
     drivers with !!value to [0,1] and then augmenting the code to
     propagate error codes to consumers.  (Includes some ACKed patches
     in other subsystems.)

   - Add a void *data pointer to struct gpio_chip.  The container_of()
     design pattern is indeed very nice, but we want to reform the
     struct gpio_chip to be a non-volative, stateless business, and keep
     states internal to the gpiolib to be able to hold on to the state
     when adding a proper userspace ABI (character device) further down
     the road.  To achieve this, drivers need a handle at the internal
     state that is not dependent on their struct gpio_chip() so we add
     gpiochip_add_data() and gpiochip_get_data() following the pattern
     of many other subsystems.  All the "use gpiochip data pointer"
     patches transforms drivers to this scheme.

   - The Generic GPIO chip header has been merged into the general
     <linux/gpio/driver.h> header, and the custom header for that
     removed.  Instead of having a separate mm_gpio_chip struct for
     these generic drivers, merge that into struct gpio_chip,
     simplifying the code and removing the need for separate and
     confusing includes.

  Misc improvements:

   - Stabilize the way GPIOs are looked up from the ACPI legacy
     specification.

   - Incremental driver features for PXA, PCA953X, Lantiq (patches from
     the OpenWRT community), RCAR, Zynq, PL061, 104-idi-48

  New drivers:

   - Add a GPIO chip to the ALSA SoC AC97 driver.

   - Add a new Broadcom NSP SoC driver (this lands in the pinctrl dir,
     but the branch is merged here too to account for infrastructural
     changes).

   - The sx150x driver now supports the sx1502"

* tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (220 commits)
  gpio: generic: make bgpio_pdata always visible
  gpiolib: fix chip order in gpio list
  gpio: mpc8xxx: Do not use gpiochip_get_data() in mpc8xxx_gpio_save_regs()
  gpio: mm-lantiq: Do not use gpiochip_get_data() in ltq_mm_save_regs()
  gpio: brcmstb: Allow building driver for BMIPS_GENERIC
  gpio: brcmstb: Set endian flags for big-endian MIPS
  gpio: moxart: fix build regression
  gpio: xilinx: Do not use gpiochip_get_data() in xgpio_save_regs()
  leds: pca9532: use gpiochip data pointer
  leds: tca6507: use gpiochip data pointer
  hid: cp2112: use gpiochip data pointer
  bcma: gpio: use gpiochip data pointer
  avr32: gpio: use gpiochip data pointer
  video: fbdev: via: use gpiochip data pointer
  gpio: pch: Optimize pch_gpio_get()
  Revert "pinctrl: lantiq: Implement gpio_chip.to_irq"
  pinctrl: nsp-gpio: use gpiochip data pointer
  pinctrl: vt8500-wmt: use gpiochip data pointer
  pinctrl: exynos5440: use gpiochip data pointer
  pinctrl: at91-pio4: use gpiochip data pointer
  ...
2016-01-17 12:32:01 -08:00
Linus Walleij 370ea61134 pinctrl: at91: 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: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-01-05 14:14:53 +01:00
Thierry Reding bab7f5a401 pinctrl: at91: Use platform_register/unregister_drivers()
These new helpers simplify implementing multi-driver modules and
properly handle failure to register one driver by unregistering all
previously registered drivers.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-12-10 23:50:53 +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
Linus Torvalds e86328c489 This is the bulk of GPIO changes for v4.4:
GPIO core:
 - Define and handle flags for open drain/open collector
   and open source/open emitter, also know as "single-ended"
   configurations.
 - Generic request/free operations that handle calling out
   to the (optional) pin control backend.
 - Some refactoring related to an ABI change that did not
   happen, yet provide useful.
 - Added a real-time compliance checklist. Many GPIO chips
   have irqchips, and need to think this over with the RT
   patches going upstream.
 - Restructure, fix and clean up Kconfig menus a bit.
 
 New drivers:
 - New driver for AMD Promony.
 - New driver for ACCES 104-IDIO-16, a port-mapped I/O
   card, ISA-style. Very retro.
 
 Subdriver changes:
 - OMAP changes to handle real time requirements.
 - Handle trigger types for edge and level IRQs on PL061
   properly. As this hardware is very common it needs to
   set a proper example for others to follow.
 - Some container_of() cleanups.
 - Delete the unused MSM driver in favor of the driver that
   is embedded inside the pin control driver.
 - Cleanup of the ath79 GPIO driver used by many, many
   OpenWRT router targets.
 - A consolidated IT87xx driver replacing the earlier
   very specific IT8761e driver.
 - Handle the TI TCA9539 in the PCA953x driver. Also
   handle ACPI devices in this subdriver.
 - Drop xilinx arch dependencies as these FPGAs seem to
   profilate over a few different architectures. MIPS and
   ARM come to mind.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJWNz3qAAoJEEEQszewGV1zKlAP/R+mVoQHyfDFurChDzuWQjZK
 T4eDiFGTHr/MUDP9I0jINF400SfEm3ajm3aoPvKc6fA2d7oLNB7TzyUxjDsQV4h8
 NsCJ9IYD9xYgF6SDovPYPZ6SkRJYimDrwjD/DUSR8ijisVzJwYCyEGznelWKnQMo
 Fcw4kOTMrW0034ZT4nGH4kSgIzNAMcecazaaqLisniYZ/4Ozk1CQsrBK1gCO/kr8
 Hh3N/mN4TBvOyIuD7lmN5PnWuJo641rplcWErjxUZYvqEddSfAnpasfAcXMkZ4gM
 jOK+l7VIycxOAn+EJwqjyVPJ0gDPPaMwB836gogzNraO2SYd/R2JvyI2zyTogmdW
 MNwsKwP2b/ma/h0A/JBDFmcMiJwA2QHHgylLrB+vfWAP9o2nJv++Op1/q8ktVR+1
 EgEk9StVvnYqC86DJhYbUbMmX7TorRwPoUo/5Z6C/viyZzOagZge0vYKYTQS99Pq
 B+2aH7pMPLooAdU/cyYy8J20mxQ4RaHoy+TCe0RMRhxnRi9CnnnYNHbZDVdHISpr
 OSfZKSM40DbAAs7UNxIgPXM1qSzia23tgzZEdh5qwQtZBTC6fWr/1xOrTpFW2wY6
 VxqgP/OX23BzJQE4YDnOHLIj8GX0MLqXr7pl2+KBcHO9xvPS6Qj8fFsLEVatCwX0
 Caify6KIbbgMWcVmut/6
 =LDCr
 -----END PGP SIGNATURE-----

Merge tag 'gpio-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "Here is the bulk of GPIO changes for the v4.4 development cycle.

  The only changes hitting outside drivers/gpio are in the pin control
  subsystem and these seem to have settled nicely in linux-next.

  Development mistakes and catfights are nicely documented in the
  reverts as you can see.  The outcome of the ABI fight is that we're
  working on a chardev ABI for GPIO now, where hope to show results for
  the v4.5 kernel.

  Summary of changes:

  GPIO core:
   - Define and handle flags for open drain/open collector and open
     source/open emitter, also know as "single-ended" configurations.
   - Generic request/free operations that handle calling out to the
     (optional) pin control backend.
   - Some refactoring related to an ABI change that did not happen, yet
     provide useful.
   - Added a real-time compliance checklist.  Many GPIO chips have
     irqchips, and need to think this over with the RT patches going
     upstream.
   - Restructure, fix and clean up Kconfig menus a bit.

  New drivers:
   - New driver for AMD Promony.
   - New driver for ACCES 104-IDIO-16, a port-mapped I/O card,
     ISA-style.  Very retro.

  Subdriver changes:
   - OMAP changes to handle real time requirements.
   - Handle trigger types for edge and level IRQs on PL061 properly.  As
     this hardware is very common it needs to set a proper example for
     others to follow.
   - Some container_of() cleanups.
   - Delete the unused MSM driver in favor of the driver that is
     embedded inside the pin control driver.
   - Cleanup of the ath79 GPIO driver used by many, many OpenWRT router
     targets.
   - A consolidated IT87xx driver replacing the earlier very specific
     IT8761e driver.
   - Handle the TI TCA9539 in the PCA953x driver.  Also handle ACPI
     devices in this subdriver.
   - Drop xilinx arch dependencies as these FPGAs seem to profilate over
     a few different architectures.  MIPS and ARM come to mind"

* tag 'gpio-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (57 commits)
  gpio: fix up SPI submenu
  gpio: drop surplus I2C dependencies
  gpio: drop surplus X86 dependencies
  gpio: dt-bindings: document the official use of "ngpios"
  gpio: MAINTAINERS: Add an entry for the ATH79 GPIO driver
  gpio / ACPI: Allow shared GPIO event to be read via operation region
  gpio: group port-mapped I/O drivers in a menu
  gpio: Add ACCES 104-IDIO-16 driver maintainer entry
  gpio: zynq: Document interrupt-controller DT binding
  gpio: xilinx: Drop architecture dependencies
  gpio: generic: Revert to old error handling in bgpio_map
  gpio: add a real time compliance notes
  Revert "gpio: add a real time compliance checklist"
  gpio: Add GPIO support for the ACCES 104-IDIO-16
  gpio: driver for AMD Promontory
  gpio: xlp: Convert to use gpiolib irqchip helpers
  gpio: add a real time compliance checklist
  gpio/xilinx: enable for MIPS
  gpiolib: Add and use OF_GPIO_SINGLE_ENDED flag
  gpiolib: Split GPIO flags parsing and GPIO configuration
  ...
2015-11-02 12:59:12 -08:00
Julia Lawall d94b986aa7 pinctrl: at91: add missing of_node_put
for_each_child_of_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
expression root,e;
local idexpression child;
@@

 for_each_child_of_node(root, child) {
   ... when != of_node_put(child)
       when != e = child
(
   return child;
|
+  of_node_put(child);
?  return ...;
)
   ...
 }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-27 17:17:11 +01:00
Jonas Gorski 98c85d583a pinctrl: replace trivial implementations of gpio_chip request/free
Replace all trivial request/free callbacks that do nothing but call into
pinctrl code with the generic versions.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Eric Anholt <eric@anholt.net>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andrew Bresticker <abrestic@chromium.org>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Lee Jones <lee@kernel.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-16 22:20:21 +02:00
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
David Dueck 1ab36387ea pinctrl: at91: fix null pointer dereference
Not all gpio banks are necessarily enabled, in the current code this can
lead to null pointer dereferences.

[   51.130000] Unable to handle kernel NULL pointer dereference at virtual address 00000058
[   51.130000] pgd = dee04000
[   51.130000] [00000058] *pgd=3f66d831, *pte=00000000, *ppte=00000000
[   51.140000] Internal error: Oops: 17 [#1] ARM
[   51.140000] Modules linked in:
[   51.140000] CPU: 0 PID: 1664 Comm: cat Not tainted 4.1.1+ #6
[   51.140000] Hardware name: Atmel SAMA5
[   51.140000] task: df6dd880 ti: dec60000 task.ti: dec60000
[   51.140000] PC is at at91_pinconf_get+0xb4/0x200
[   51.140000] LR is at at91_pinconf_get+0xb4/0x200
[   51.140000] pc : [<c01e71a0>]    lr : [<c01e71a0>]    psr: 600f0013
sp : dec61e48  ip : 600f0013  fp : df522538
[   51.140000] r10: df52250c  r9 : 00000058  r8 : 00000068
[   51.140000] r7 : 00000000  r6 : df53c910  r5 : 00000000  r4 : dec61e7c
[   51.140000] r3 : 00000000  r2 : c06746d4  r1 : 00000000  r0 : 00000003
[   51.140000] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   51.140000] Control: 10c53c7d  Table: 3ee04059  DAC: 00000015
[   51.140000] Process cat (pid: 1664, stack limit = 0xdec60208)
[   51.140000] Stack: (0xdec61e48 to 0xdec62000)
[   51.140000] 1e40:                   00000358 00000000 df522500 ded15f80 c05a9d08 ded15f80
[   51.140000] 1e60: 0000048c 00000061 df522500 ded15f80 c05a9d08 c01e7304 ded15f80 00000000
[   51.140000] 1e80: c01e6008 00000060 0000048c c01e6034 c01e5f6c ded15f80 dec61ec0 00000000
[   51.140000] 1ea0: 00020000 ded6f280 dec61f80 00000001 00000001 c00ae0b8 b6e80000 ded15fb0
[   51.140000] 1ec0: 00000000 00000000 df4bc974 00000055 00000800 ded6f280 b6e80000 ded6f280
[   51.140000] 1ee0: ded6f280 00020000 b6e80000 00000000 00020000 c0090dec c0671e1c dec61fb0
[   51.140000] 1f00: b6f8b510 00000001 00004201 c000924c 00000000 00000003 00000003 00000000
[   51.140000] 1f20: df4bc940 00022000 00000022 c066e188 b6e7f000 c00836f4 000b6e7f ded6f280
[   51.140000] 1f40: ded6f280 b6e80000 dec61f80 ded6f280 00020000 c0091508 00000000 00000003
[   51.140000] 1f60: 00022000 00000000 00000000 ded6f280 ded6f280 00020000 b6e80000 c0091d9c
[   51.140000] 1f80: 00000000 00000000 ffffffff 00020000 00020000 b6e80000 00000003 c000f124
[   51.140000] 1fa0: dec60000 c000efa0 00020000 00020000 00000003 b6e80000 00020000 000271c4
[   51.140000] 1fc0: 00020000 00020000 b6e80000 00000003 7fffe000 00000000 00000000 00020000
[   51.140000] 1fe0: 00000000 bef50b64 00013835 b6f29c76 400f0030 00000003 00000000 00000000
[   51.140000] [<c01e71a0>] (at91_pinconf_get) from [<c01e7304>] (at91_pinconf_dbg_show+0x18/0x2c0)
[   51.140000] [<c01e7304>] (at91_pinconf_dbg_show) from [<c01e6034>] (pinconf_pins_show+0xc8/0xf8)
[   51.140000] [<c01e6034>] (pinconf_pins_show) from [<c00ae0b8>] (seq_read+0x1a0/0x464)
[   51.140000] [<c00ae0b8>] (seq_read) from [<c0090dec>] (__vfs_read+0x20/0xd0)
[   51.140000] [<c0090dec>] (__vfs_read) from [<c0091508>] (vfs_read+0x7c/0x108)
[   51.140000] [<c0091508>] (vfs_read) from [<c0091d9c>] (SyS_read+0x40/0x94)
[   51.140000] [<c0091d9c>] (SyS_read) from [<c000efa0>] (ret_fast_syscall+0x0/0x3c)
[   51.140000] Code: eb010ec2 e30a0d08 e34c005a eb0ae5a7 (e5993000)
[   51.150000] ---[ end trace fb3c370da3ea4794 ]---

Fixes: a0b957f306 ("pinctrl: at91: allow to have disabled gpio bank")
Cc: stable@vger.kernel.org # 3.18
Signed-off-by: David Dueck <davidcdueck@googlemail.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-08-30 21:58:53 +02:00
Geert Uytterhoeven 91d33cfedf pinctrl: at91: Use generic irq_{request,release}_resources()
The at91-specific irq_{request,release}_resources() callbacks are
identical to the generic ones, modulo the bug fix in 5b76e79c77
("gpiolib: irqchip: prevent driver unloading if gpio is used as irq
only").

Until commit 8b67a1f0ad ("gpio: don't override irq_*_resources()
callbacks"), the buggy at91-specific callbacks were never used, though.

Hence drop the at91-specific ones in favor of the generic ones.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-08-26 09:32:20 +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 c639845bcb pinctrl/at91: 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
Alexander Stein 1893b2cfad pinctrl: at91: Add set_multiple GPIO chip feature
This adds the callback for set_multiple.

As this controller has a separate set and clear register, we
can't write directly to PIO_ODSR as this would required a cached
variable and would race with at91_gpio_set.

So build masks for the PIO_SODR and PIO_CODR registers and
write them together.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-05-06 14:45:18 +02:00
Linus Torvalds 07e492eb89 This is the bulk of pin control changes for the v4.1 development
cycle:
 
 New drivers:
   - Intel Sunrisepoint
   - AMD KERNCZ GPIO
   - Broadcom Cygnus IOMUX
 
 New subdrivers:
   - Marvell MVEBU Armada 39x SoCs
   - Samsung Exynos 5433
   - nVidia Tegra 210
   - Mediatek MT8135
   - Mediatek MT8173
   - AMLogic Meson8b
   - Qualcomm PM8916
 
 On top of this cleanups and development history for the above
 drivers as issues were fixed after merging.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJVLSiSAAoJEEEQszewGV1z/nMP/jXyxCb8THuAyCFkJoY+Hgzz
 dj3eMt+TPPyqt6lG3WODq/lQFxEdE28TqHYf2eGVdpriCpuyecFxyf9MPzY3P60E
 v6XfzIeUOIGovw781qsg9TxJAZ0C+DLmNgpS8kWhnK7Igs3EJrRcz5Zz00F32olv
 1dojVIQF6Nsn3M2Cc6bzF2wkJre3tLsUT7KXGZw4e3yA0K1XMZI3jYYXZ25GgLW0
 CpZ1vKdKgwuBsgV5waJ8XZuFMqo3FRhjcD/f8ubk5hhMK6Wx6gszBcrLKVlkbz+2
 XJzhn5tZSupSKmBtl0gCzP7pgVc0JeV8P12hHv6imT82rCU0YGBidNX2s3GrscnF
 Nfwpw/BsaOXcu9CttI5LndvDlvCH2hUAal6i4IghiL5sRzlcW4jUoWHkIa8e6dHe
 e/zjJSo7tXrWio30Dl6++qklcDimP3sbaaFseENhLUSl7hDGJ09Tx8yxEOFN3PX6
 29i7ZC+ifZFzS30E3E+MOlFrxp3MB7j/z/ig3HL7XYr/TTiCKMNbKJNOlmGEfiTV
 VI3GvTAJgt/1U+AOJI7a5xrxivaGL5GWXuoonQHY1gPrvjqkL54w4j+XBpj4tXIV
 LBh6AS6G6AJDUOEU00EroCxOt1FPMW24zQvTKP18sgXsKWqHTIKT9B5RZbDXM9D7
 pLfOIy0H1RWdQGvGgK7X
 =MGqe
 -----END PGP SIGNATURE-----

Merge tag 'pinctrl-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pincontrol updates from Linus Walleij:
 "This is the bulk of pin control changes for the v4.1 development
  cycle.  Nothing really exciting this time: we basically added a few
  new drivers and subdrivers and stabilized them in linux-next.  Some
  cleanups too.  With sunrisepoint Intel has a real fine fully featured
  pin control driver for contemporary hardware, and the AMD driver is
  also for large deployments.  Most of the others are ARM devices.

  New drivers:
    - Intel Sunrisepoint
    - AMD KERNCZ GPIO
    - Broadcom Cygnus IOMUX

  New subdrivers:
    - Marvell MVEBU Armada 39x SoCs
    - Samsung Exynos 5433
    - nVidia Tegra 210
    - Mediatek MT8135
    - Mediatek MT8173
    - AMLogic Meson8b
    - Qualcomm PM8916

  On top of this cleanups and development history for the above drivers
  as issues were fixed after merging"

* tag 'pinctrl-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (71 commits)
  pinctrl: sirf: move sgpio lock into state container
  pinctrl: Add support for PM8916 GPIO's and MPP's
  pinctrl: bcm2835: Fix support for threaded level triggered IRQs
  sh-pfc: r8a7790: add EtherAVB pin groups
  pinctrl: Document "function" + "pins" pinmux binding
  pinctrl: intel: Add Intel Sunrisepoint pin controller and GPIO support
  pinctrl: fsl: imx: Check for 0 config register
  pinctrl: Add support for Meson8b
  documentation: Extend pinctrl docs for Meson8b
  pinctrl: Cleanup Meson8 driver
  Fix inconsistent spinlock of AMD GPIO driver which can be recognized by static analysis tool smatch. Declare constant Variables with Sparse's suggestion.
  pinctrl: at91: convert __raw to endian agnostic IO
  pinctrl: constify of_device_id array
  pinctrl: pinconf-generic: add dt node names to error messages
  pinctrl: pinconf-generic: scan also referenced phandle node
  pinctrl: mvebu: add suspend/resume support to Armada XP pinctrl driver
  pinctrl: st: Display pin's function when printing pinctrl debug information
  pinctrl: st: Show correct pin direction also in GPIO mode
  pinctrl: st: Supply a GPIO get_direction() call-back
  pinctrl: st: Move st_get_pio_control() further up the source file
  ...
2015-04-14 17:58:15 -07:00
Ben Dooks d480239ba4 pinctrl: at91: convert __raw to endian agnostic IO
Use endian agnostic _relaxed IO accessors instead of the __raw ones.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-04-07 11:05:53 +02:00
Fabian Frederick baa9946e32 pinctrl: constify of_device_id array
of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-03-27 09:58:35 +01:00
Boris Brezillon bd8733738c pinctrl: at91: move lock/unlock_as_irq calls into request/release
The gpiochip_lock_as_irq call can fail and return an error,
while the irq_startup is not expected to fail (returns an
unsigned int which is not checked by irq core code).

irq_request/release_resources functions have been created
to address this problem.

Move gpiochip_lock/unlock_as_irq calls into
irq_request/release_resources functions to prevent using a
gpio as an irq if the gpiochip_lock_as_irq call failed.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-03-18 02:01:36 +01:00
Baruch Siach 11131ba435 pinctrl: at91: simplify probe error handling
There is no code ender the 'err' label. Just return the error code directly.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-03-09 18:11:00 +01:00
Jean-Christophe PLAGNIOL-VILLARD a0b957f306 pinctrl: at91: allow to have disabled gpio bank
Today we expect that all the bank are enabled, and count the number of banks
used by the pinctrl based on it instead of using the last bank id enabled.

So switch to it, set the chained IRQ at runtime based on enabled banks
and wait only the number of enabled gpio controllers at probe time.

Cc: <stable@vger.kernel.org> # 3.18
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-26 09:13:36 +01:00
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iEYEABECAAYFAlSOD20ACgkQMUfUDdst+ylLPACg2QrW1oHhdTMT9WI8jihlHVRM
 53kAoLeteByQ3iVwWurwwseRPiWa8+MI
 =OVRS
 -----END PGP SIGNATURE-----

Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00
Linus Torvalds 980f3c344f This is the bulk of GPIO changes for the v3.19 series:
- A new API that allows setting more than one GPIO at the
   time. This is implemented for the new descriptor-based
   API only and makes it possible to e.g. toggle a clock and
   data line at the same time, if the hardware can do this
   with a single register write. Both consumers and drivers
   need new calls, and the core will fall back to driving
   individual lines where needed. Implemented for the MPC8xxx
   driver initially.
 - Patched the mdio-mux-gpio and the serial mctrl driver
   that drives modems to use the new multiple-setting API
   to set several signals simultaneously.
 - Get rid of the global GPIO descriptor array, and instead
   allocate descriptors dynamically for each GPIO on a certain
   GPIO chip. This moves us closer to getting rid of the
   limitation of using the global, static GPIO numberspace.
 - New driver and device tree bindings for 74xx ICs.
 - New driver and device tree bindings for the VF610 Vybrid.
 - Support the RCAR r8a7793 and r8a7794.
 - Guidelines for GPIO device tree bindings trying to get
   things a bit more strict with the advent of combined
   device properties.
 - Suspend/resume support for the MVEBU driver.
 - A slew of minor fixes and improvements.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJUjgQ7AAoJEEEQszewGV1zuJ8P+wamlDNhJbsgqXPcSCZZFgeP
 1O22VRYqoo/i8mAzNCRi2h6NogO9Da6rCRhHdH35TsuNzIbusHE+btMukj248qJ7
 WYOf25I0ImyUP8kulogW4/+7lYibRLHnN2BSLuAkApofmxDvODPS1KNWHulcOcxl
 VaVsA8wvFzQO1s1Wjv94ctVfs5rqk7mBfPwk61zHuLeETecmKg0e52p0Uzqlq6gi
 UKi9uK3sjQ7kI/+xa+qDrF9GRwRR22oJfD/9zNj8g94iU9iMs5Oh+Zp3RJcvYUSD
 y5BIb+IY2ATy20ZkijWmeP8LJz6pja+C9Ne7lKM0jkv7geGeHGAoavz0n3oUq4oz
 IvUNz6hCAP9PcxWc5a9FFqqORLWrRew6GmZmJvIkmC9K+3UQcWhkzO3vLpfl6Q9h
 S728XexkIlhxG9NcER21bFXV2dw3z/X9dm5mQ473TqJm+wQmRuYcPRg053NbqMcx
 juvkweCksx8qlpnjo/1QXQcVwFM8kuR7xAlVo7zdMDOU5F8pdxRnsTl0cUdx5cPv
 DKeMRg8+FYcHmIoe/EodemIh7cAZtEpijZNNAr9cDmAjifeBjWhCb+zri5SIc96x
 0jKVTXyY4jnHXBVoA0FIl1d2t54yVjh3PYiu0MjeLJ9tyB+Px/nOxW8FrdlFnPJ/
 oP5WK13c8h3bMkxUzsvL
 =ZAhA
 -----END PGP SIGNATURE-----

Merge tag 'gpio-v3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull take two of the GPIO updates:
 "Same stuff as last time, now with a fixup patch for the previous
  compile error plus I ran a few extra rounds of compile-testing.

  This is the bulk of GPIO changes for the v3.19 series:

   - A new API that allows setting more than one GPIO at the time.  This
     is implemented for the new descriptor-based API only and makes it
     possible to e.g. toggle a clock and data line at the same time, if
     the hardware can do this with a single register write.  Both
     consumers and drivers need new calls, and the core will fall back
     to driving individual lines where needed.  Implemented for the
     MPC8xxx driver initially

   - Patched the mdio-mux-gpio and the serial mctrl driver that drives
     modems to use the new multiple-setting API to set several signals
     simultaneously

   - Get rid of the global GPIO descriptor array, and instead allocate
     descriptors dynamically for each GPIO on a certain GPIO chip.  This
     moves us closer to getting rid of the limitation of using the
     global, static GPIO numberspace

   - New driver and device tree bindings for 74xx ICs

   - New driver and device tree bindings for the VF610 Vybrid

   - Support the RCAR r8a7793 and r8a7794

   - Guidelines for GPIO device tree bindings trying to get things a bit
     more strict with the advent of combined device properties

   - Suspend/resume support for the MVEBU driver

   - A slew of minor fixes and improvements"

* tag 'gpio-v3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (33 commits)
  gpio: mcp23s08: fix up compilation error
  gpio: pl061: document gpio-ranges property for bindings file
  gpio: pl061: hook request if gpio-ranges avaiable
  gpio: mcp23s08: Add option to configure IRQ output polarity as active high
  gpio: fix deferred probe detection for legacy API
  serial: mctrl_gpio: use gpiod_set_array function
  mdio-mux-gpio: Use GPIO descriptor interface and new gpiod_set_array function
  gpio: remove const modifier from gpiod_get_direction()
  gpio: remove gpio_descs global array
  gpio: mxs: implement get_direction callback
  gpio: em: Use dynamic allocation of GPIOs
  gpio: Check if base is positive before calling gpio_is_valid()
  gpio: mcp23s08: Add simple IRQ support for SPI devices
  gpio: mcp23s08: request a shared interrupt
  gpio: mcp23s08: Do not free unrequested interrupt
  gpio: rcar: Add r8a7793 and r8a7794 support
  gpio-mpc8xxx: add mpc8xxx_gpio_set_multiple function
  gpiolib: allow simultaneous setting of multiple GPIO outputs
  gpio: mvebu: add suspend/resume support
  gpio: gpio-davinci: remove duplicate check on resource
  ..
2014-12-14 14:05:05 -08:00
Matthieu Crapet 853b6bf044 pinctrl: at91: enhance (debugfs) at91_gpio_dbg_show
When a pin is configured as GPIO, print also direction (input or output).

Signed-off-by: Matthieu Crapet <mcrapet@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-12-03 12:23:10 +01:00
Alexandre Belloni c654b6bf2c pinctrl: at91: use own header
Copy the mach/at91_pio.h header locally and use it for pinctrl-at91.c. This
allows to remove the dependency on mach/at91_pio.h to be able to move at91 to
multiplatform.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-10-29 09:28:35 +01:00
Alexandre Courbot e3a2e87893 gpio: rename gpio_lock_as_irq to gpiochip_lock_as_irq
This function actually operates on a gpio_chip, so its prefix should
reflect that fact for consistency with other functions defined in
gpio/driver.h.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-10-28 17:30:59 +01:00
Wolfram Sang 5c759d73b0 pinctrl: drop owner assignment from platform_drivers
A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-20 16:21:21 +02:00
Linus Torvalds 2b425a3f11 This is the bulk of pin control changes for the v3.18
development series:
 
 - New drivers for the Freescale i.MX21, Qualcomm APQ8084
   pin controllers.
 
 - Incremental new features on the Rockchip, atlas 6,
   OMAP, AM437x, APQ8064, prima2, AT91, Tegra, i.MX, Berlin
   and Nomadik.
 
 - Push Freescale drivers down into their own subdirectory.
 
 - Assorted sprays of syntax and semantic fixes.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJUMkr3AAoJEEEQszewGV1z/xsP/1EFR6zyriyup3TuWw1kiqwH
 wGuEK3i0v99INcK46l9xD65aZLaK60Z6llYAmwa2wmFCDotOr46GSW2V9bqd0RHg
 6EZdDATo8Ge8j86L9oUMElbMJoKMQiVC6+YeiuhQRrFuq8TpXGoTMPeQlaEslR08
 MUjIVcxRbFeQCWOgkaqjjxwgX1FPU1S9aQNxDDDPuWSwTowV0nwBpdFviAgWlouY
 DDG4/WPWH7s/Ujv0MJ7MQR9Hkl6WYlcuhGWDUkcIj7f1lvxTTB37Em7daBUBwhQo
 PEYmf1AtwMEWF2y1i99ExFE/YSBQjjslYe29uECvaH63PVgfRMrWgJl199NOed8Q
 9GfEa+uwiV4Z4PxFZqcvsjUiNQg8SoijP4UTf9AJTuQZtebVia8OS9AFsN3XULHJ
 zXGKbCUd2kH+p/0/MJUePQEDoi9bPrsIhNG/s3KYmawQ6Ua4uytPgG0lF91dvP6m
 LvCnsGNDvGQUk1UUG3Lj4ZDCP42TAbjNyr27Ot/oUAygjHfjsXsZ6FFmlMCOeCRx
 tV+qjW9Ng69CSLPLKHCHVMsXKliJ2Vp2Mt8cr8yFyHaMDIneRx3IqUvrZ0dzfVLq
 /H3/7usvR/sEV23AI920mfPVYruIJESpBh6NKt66tPSSV2C6HP/qRTN/6tAwXqBL
 rzwv2t8qu5+ic2Ae5/wk
 =b4Tn
 -----END PGP SIGNATURE-----

Merge tag 'pinctrl-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control changes from Linus Walleij:
 "This is the bulk of pin control changes for the v3.18 development
  series:

   - New drivers for the Freescale i.MX21, Qualcomm APQ8084 pin
     controllers.

   - Incremental new features on the Rockchip, atlas 6, OMAP, AM437x,
     APQ8064, prima2, AT91, Tegra, i.MX, Berlin and Nomadik.

   - Push Freescale drivers down into their own subdirectory.

   - Assorted sprays of syntax and semantic fixes"

* tag 'pinctrl-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (48 commits)
  pinctrl: specify bindings for pins and groups
  pinctrl: nomadik: improve GPIO debug prints
  pinctrl: abx500: refactor DT parser to take two paths
  pinctrl: abx500: use helpers for map allocation/free
  pinctrl: alter device tree bindings for functions
  pinctrl: nomadik: refactor DT parser to take two paths
  pinctrl: nomadik: use utils map free function
  pinctrl: nomadik: use util function to reserve maps
  pinctrl: qcom: use restart_notifier mechanism for ps_hold
  pinctrl: sh-pfc: sh73a0: Remove unnecessary SoC data allocation
  pinctrl: berlin: fix the dt_free_map function
  pinctrl: at91: disable PD or PU before enabling PU or PD
  pinctrl: st: remove gpiochip in failure cases
  pinctrl: at91: Fix error handling while doing gpiochio_irqchip_add
  pinctrl: at91: Fix failure path in at91_gpio_probe path
  pinctrl: lantiq: Release gpiochip resources in fail case
  pinctrl: imx: detect uninitialized pins
  pinctrl: tegra: Add MIPI pad control
  pinctrl: at91: Switch to using managed clk_get
  pinctrl: adi2: Remove duplicate gpiochip_remove_pin_ranges
  ...
2014-10-07 20:56:28 -04:00
Wenyou Yang 3d78427397 pinctrl: at91: disable PD or PU before enabling PU or PD
Disable Pull-Down or Pull-Up property before enabling Pull-Up or
Pull-Down, because the pin's Pull-Up and Pull-Down property is
mutually exclusive.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-09-23 16:59:55 +02:00
Pramod Gurav 834e167864 pinctrl: at91: Fix error handling while doing gpiochio_irqchip_add
This patch removes a call to panic function when gpiochio_irqchip_add
fails and just returns the error to the calling function.
Same return value is used to handle the error case and adds a lable
to release resources on error.
The error message has been improved to indicate failure to add irqchip
to gpiochip.

This also changes first argument to function at91_gpio_of_irq_setup from
struct device_node to struct platform_device. Because The device_node
argument was anyway not being used. Passed pdev so that on failure dev_err
can use &pdev->dev and log can be associated with proper device.

CC: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
CC: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-09-23 16:46:47 +02:00
Pramod Gurav 70e4197420 pinctrl: at91: Fix failure path in at91_gpio_probe path
This fixes the whole error handling in probe function by capturing and
returning error values on kernel function like clk_prepare,
clk_enable, gpiochip_add etc.

CC: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
CC: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-09-23 16:45:22 +02:00
Pramod Gurav 02b837ffe0 pinctrl: at91: Switch to using managed clk_get
This patch switches to using managed version of clk_get and hence
removes clk_put from failure path.

CC: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
CC: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-09-05 10:34:03 +02:00
Marek Roszko 4334ac2db2 pinctrl: at91: add drive strength configuration
The SAMA5 and SAM9x5 series both have drive strength
options for the PIOs. This patch adds the ability to set
one of three hardware options for drive strengths of low,
medium or high for the each pin. The actual current output
of the chip based on the setting is defined in the datasheets
and varies per pins separate from banks and with supply
voltage.

This patch adds three new dt-bindings that allow setting the
strength when configuring pins. By default, no change will
be made to the drive strength of a pin from its reset value.
Due to the difference between the register addresses of the
SAMA5 and SAM9x5 series, a new sama5d3-pinctrl id was added.

Signed-off-by: Marek Roszko <mark.roszko@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-09-05 10:32:06 +02:00
Linus Walleij 03e9f0cac5 pinctrl: clean up after enable refactoring
commit 2243a87d90
"pinctrl: avoid duplicated calling enable_pinmux_setting for a pin"
removed the .disable callback from the struct pinmux_ops,
making the .enable() callback the only remaining callback.

However .enable() is a bad name as it seems to imply that a
muxing can also be disabled. Rename the callback to .set_mux()
and also take this opportunity to clean out any remaining
mentions of .disable() from the documentation.

Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: Fan Wu <fwu@marvell.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-09-04 10:05:07 +02:00
Hans Wennborg 4b6fe45a79 pinctrl: pinctrl-at91.c: fix decimal printf format specifiers prefixed with 0x
The prefix suggests the number should be printed in hex, so use
the %x specifier to do that.

Found by using regex suggested by Joe Perches.

Signed-off-by: Hans Wennborg <hans@hanshq.net>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-08-17 09:15:44 -05:00
Rickard Strandqvist 445d20260b pinctrl: pinctrl-at91.c: Cleaning up values that are never used
Remove variable that are never used

This was found using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-07-11 14:08:33 +02:00
Rickard Strandqvist ca7162add9 pinctrl: pinctrl-at91.c: Cleaning up if unsigned is less than zero
Remove checking if a unsigned is less than zero

This was found using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-07-11 14:08:32 +02:00
Fan Wu 2243a87d90 pinctrl: avoid duplicated calling enable_pinmux_setting for a pin
What the patch does:
1. Call pinmux_disable_setting ahead of pinmux_enable_setting
  each time pinctrl_select_state is called
2. Remove the HW disable operation in pinmux_disable_setting function.
3. Remove the disable ops in struct pinmux_ops
4. Remove all the disable ops users in current code base.

Notes:
1. Great thanks for the suggestion from Linus, Tony Lindgren and
   Stephen Warren and Everyone that shared comments on this patch.
2. The patch also includes comment fixes from Stephen Warren.

The reason why we do this:
1. To avoid duplicated calling of the enable_setting operation
   without disabling operation inbetween which will let the pin
   descriptor desc->mux_usecount increase monotonously.
2. The HW pin disable operation is not useful for any of the
   existing platforms.
   And this can be used to avoid the HW glitch after using the
   item #1 modification.

In the following case, the issue can be reproduced:
1. There is a driver that need to switch pin state dynamically,
   e.g. between "sleep" and "default" state
2. The pin setting configuration in a DTS node may be like this:

  component a {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&a_grp_setting &c_grp_setting>;
	pinctrl-1 = <&b_grp_setting &c_grp_setting>;
  }

  The "c_grp_setting" config node is totally identical, maybe like
  following one:

  c_grp_setting: c_grp_setting {
	pinctrl-single,pins = <GPIO48 AF6>;
  }

3. When switching the pin state in the following official pinctrl
   sequence:
	pin = pinctrl_get();
	state = pinctrl_lookup_state(wanted_state);
	pinctrl_select_state(state);
	pinctrl_put();

Test Result:
1. The switch is completed as expected, that is: the device's
   pin configuration is changed according to the description in the
   "wanted_state" group setting
2. The "desc->mux_usecount" of the corresponding pins in "c_group"
   is increased without being decreased, because the "desc" is for
   each physical pin while the setting is for each setting node
   in the DTS.
   Thus, if the "c_grp_setting" in pinctrl-0 is not disabled ahead
   of enabling "c_grp_setting" in pinctrl-1, the desc->mux_usecount
   will keep increasing without any chance to be decreased.

According to the comments in the original code, only the setting,
in old state but not in new state, will be "disabled" (calling
pinmux_disable_setting), which is correct logic but not intact. We
still need consider case that the setting is in both old state
and new state. We can do this in the following two ways:

1. Avoid to "enable"(calling pinmux_enable_setting) the "same pin
   setting" repeatedly
2. "Disable"(calling pinmux_disable_setting) the "same pin setting",
   actually two setting instances, ahead of enabling them.

Analysis:
1. The solution #2 is better because it can avoid too much
   iteration.
2. If we disable all of the settings in the old state and one of
   the setting(s) exist in the new state, the pins mux function
   change may happen when some SoC vendors defined the
   "pinctrl-single,function-off"
   in their DTS file.
   old_setting => disabled_setting => new_setting.
3. In the pinmux framework, when a pin state is switched, the
   setting in the old state should be marked as "disabled".

Conclusion:
1. To Remove the HW disabling operation to above the glitch mentioned
   above.
2. Handle the issue mentioned above by disabling all of the settings
   in old state and then enable the all of the settings in new state.

Signed-off-by: Fan Wu <fwu@marvell.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-07-11 14:08:26 +02:00
Alexander Stein cccb0c3e6a pinctrl/at91: Fix lockup when IRQ on PIOC and PIOD occurs
With commit 80cc3732 (pinctrl/at91: convert driver to use gpiolib irqchip)
gpiochip_set_chained_irqchip is called for PIOC, PIOD and PIOE. The
associated GPIO chip for the IRQ chip is overwritten each time, because
they share the same hard IRQ line.
Thus if an IRQ occurs on PIOC or PIOD, gpio_irq_handler will only check on
PIOE (the assigned GPIO chip) where no event occured. Thus the IRQ will
not be cleared, retriggering the ISR.
Fix that (like done before) by only set the PIOC GPIO chip to the IRQ chip
and walk the list in the irq handler.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-05-27 11:13:10 +02:00
Alexander Stein 47f227163a pinctrl/at91: Fix mask creation in at91_gpio_dbg_show
pin_to_mask expects a bank pin number. So do not add the chip base.

Without that patch cat /sys/kernel/debug/gpio looks like that:
GPIOs 0-31, platform/fffff200.gpio, fffff200.gpio:
[spi32766.0] GPIOfffff200.gpio5: [gpio] set
[ads7846_pendown] GPIOfffff200.gpio15: [gpio] set
[ohci_vbus] GPIOfffff200.gpio21: [gpio] set
[ohci_vbus] GPIOfffff200.gpio24: [gpio] set
[button1] GPIOfffff200.gpio28: [gpio] clear
[button2] GPIOfffff200.gpio29: [gpio] clear

GPIOs 32-63, platform/fffff400.gpio, fffff400.gpio:
[sda] GPIOfffff400.gpio4: [periph A]
[scl] GPIOfffff400.gpio5: [periph A]
[spi32766.3] GPIOfffff400.gpio11: [periph A]
[error] GPIOfffff400.gpio22: [periph A]
[run] GPIOfffff400.gpio23: [periph A]

GPIOs 64-95, platform/fffff600.gpio, fffff600.gpio:
[reset_pin] GPIOfffff600.gpio29: [periph A]

GPIOs 96-127, platform/fffff800.gpio, fffff800.gpio:
[led1] GPIOfffff800.gpio5: [periph A]
[led2] GPIOfffff800.gpio6: [periph A]
[led3] GPIOfffff800.gpio7: [periph A]
[led4] GPIOfffff800.gpio8: [periph A]

GPIOs 128-159, platform/fffffa00.gpio, fffffa00.gpio:
[button3] GPIOfffffa00.gpio10: [periph A]
[button4] GPIOfffffa00.gpio12: [periph A]

Note that every bank despite bank 0 only shows "periph A" which are
obviously used as GPIOs.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-04-22 23:45:57 +02:00
Alexander Stein 80cc37329d pinctrl/at91: convert driver to use gpiolib irqchip
This converts the AT91 pin control driver to register its
chained irq handler and irqchip using the helpers in the
gpiolib core.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-04-22 23:37:21 +02:00
Richard Genoud 8af584b868 pinctrl: at91: implement get_direction
This is needed for gpiod_get_direction().
Otherwise, it returns -EINVAL.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-02-25 10:49:15 +01:00
Jean-Jacques Hiblot 94e692071a pinctrl: at91: use gpiolib API to mark a GPIO used as an IRQ
When an IRQ is started on a GPIO line, mark this GPIO as IRQ in
the gpiolib so we can keep track of the usage centrally.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-02-10 10:13:08 +01:00
Nicolas Ferre b0dcfd8732 pinctrl: at91: use locked variant of irq_set_handler
When setting the gpio irq type, use the __irq_set_handler_locked()
variant instead of the irq_set_handler() to prevent false
spinlock recursion warning.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: stable <stable@vger.kernel.org> # v3.12
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-02-03 09:07:30 +01:00
Linus Torvalds a547df99aa Bulk pin control changes for the v3.14 cycle:
- New driver for the Qualcomm TLMM pin controller and its
   msm8x74 subdriver.
 
 - New driver for the Broadcom Capri BCM281xx SoC.
 
 - New subdriver for the imx25 pin controller.
 
 - New subdriver for the Tegra124 pin controller.
 
 - Lock GPIO lines as IRQs for select combined pin control and
   GPIO drivers for baytrail and sirf.
 
 - Some semi-big refactorings and extenstions to the sirf
   driver.
 
 - Lots of patching, cleanup and fixing in the Renesas "PFC"
   driver and associated subdrivers as usual. It is settling
   down a little bit now it seems.
 
 - Minor fixes and incremental updates here and there as usual.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJS3mvwAAoJEEEQszewGV1zc3wP/RYjFaS4WGXX/QnvXGlTwpyb
 3IIQM4l507ds97ipjip9OO31od8HqkWw4lREwKvRdtqItZJiSzG3oYwn+ro+X2E5
 tif0kDxae1tFWieVjA2+zuvjZ76ve8FsVUuUTY7qdd4jdD3OO6P9BgDT0QqwN1Uh
 QToszugQzeOqJARn/DKHg2hkBlg0NorasskCvy6qALbXkWIpLm0U4di2HmGgvV2e
 5YqRCA8uAf48fE6Q93PQNYQU7Zux1Lyr59y0Wl/pnfKKvi1qG2KPnHDJhMmUbxJk
 tWi2VcB1Msrhccv+o0onNMfILG0xInmss3NELTTJJEhSjDvaETkng9fCbw4XDaKY
 KLQ7aRjodbGlvdAONqzZR6e0Ra+piGKDdm94+hvOn0BS1SVfjVA7d6AaeTdR6g+6
 GD+EVqzczAtla8g1xwNKp69SDN1I3yddMQzjQProSE/eGaQYN6aJW+2hDpD3SoOD
 uezFyktzehCIJ5WOIcth8RapN7p33w7bbDOuGVESCesF4NcaUqF+19ukAN9kzVhd
 6oksU1RsxLUdBg/zO7Dwyuhx0XzOuBvrP3EADU37MpnTyCGz4ko4vH0T7JHaA5Oe
 lN9otYBZT0p/kYUEdINjF3foc7f2yc8adC5kDUB9p/zdzyPIwCijGGD6shJGr11/
 7SQ8DvyJZeq3lSNs8+RG
 =ol2E
 -----END PGP SIGNATURE-----

Merge tag 'pinctrl-v3.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull bulk pin control changes from Linus Walleij:
 "This has been queued and tested for a while.  Lots of action here,
  like in the GPIO tree, embedded stuff like this is really hot now it
  seems.  Details in the signed tag.  I'm especially happy about the
  Qualcomm driver as it is used in such a huge subset of mobile handsets
  out there, and these platforms in general need better upstream support

   - New driver for the Qualcomm TLMM pin controller and its msm8x74
     subdriver.

   - New driver for the Broadcom Capri BCM281xx SoC.

   - New subdriver for the imx25 pin controller.

   - New subdriver for the Tegra124 pin controller.

   - Lock GPIO lines as IRQs for select combined pin control and GPIO
     drivers for baytrail and sirf.

   - Some semi-big refactorings and extenstions to the sirf driver.

   - Lots of patching, cleanup and fixing in the Renesas "PFC" driver
     and associated subdrivers as usual.  It is settling down a little
     bit now it seems.

   - Minor fixes and incremental updates here and there as usual"

* tag 'pinctrl-v3.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (72 commits)
  pinctrl: sunxi: Honor GPIO output initial vaules
  pinctrl: capri: add dependency on OF
  ARM: bcm11351: Enable pinctrl for Broadcom Capri SoCs
  ARM: pinctrl: Add Broadcom Capri pinctrl driver
  pinctrl: Add pinctrl binding for Broadcom Capri SoCs
  pinctrl: Add void * to pinctrl_pin_desc
  pinctrl: st: Fix a typo in probe
  pinctrl: Fix some typos and grammar issues in the documentation
  pinctrl: sirf: lock IRQs when starting them
  pinctrl: sirf: put gpio interrupt pin into input status automatically
  pinctrl: sirf: use only one irq_domain for the whole device node
  pinctrl: single: fix infinite loop caused by bad mask
  pinctrl: single: fix pcs_disable with bits_per_mux
  pinctrl: single: fix DT bindings documentation
  pinctrl: as3722: Set pin to output mode for some function
  pinctrl: sirf: add pin group for USP0 with only RX or TX frame sync
  pinctrl: sirf: fix the pins of sdmmc5 connected with TriG
  pinctrl: sirf: add lost usp1_uart_nostreamctrl group for atlas6
  pinctrl: sunxi: Add Allwinner A20 clock output pin functions
  pinctrl/lantiq: fix typo
  ...
2014-01-21 10:14:10 -08:00
Boris BREZILLON 37ef1d9243 pinctrl: at91: replace clk_prepare + clk_enable by clk_prepare_enable
Replace the clk_prepare and clk_enable calls by a single
clk_prepare_enable call.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-12-16 14:22:57 +01:00
Boris BREZILLON 795f9953ea pinctrl: at91: fix clk_unprepare and clk_disable order
clk_unprepare shall be called before clk_disable.
Fix the issue by replacing the clk_unprepare and clk_disable calls by a
single clk_disable_unprepare call.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-12-16 14:21:43 +01:00
Alexandre Belloni 4d9b8a8e46 pinctrl: at91: implement at91_pinconf_dbg_show
This allows to get the pin configuration by using debugfs. On my system:
 # cat /sys/kernel/debug/pinctrl/pinctrl.3/pinconf-pins

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-12-13 10:34:07 +01:00