linux/drivers/pinctrl
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.
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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
..
bcm GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
berlin pinctrl: berlin: guard sub-directory with CONFIG_PINCTRL_BERLIN 2015-12-01 10:39:26 +01:00
freescale pinctrl: freescale: add ZERO_OFFSET_VALID flag for vf610 pinctrl 2015-12-10 18:01:50 +01:00
intel pinctrl: intel: use gpiochip data pointer 2016-01-05 14:14:49 +01:00
mediatek GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
meson pinctrl: meson: use gpiochip data pointer 2016-01-05 14:14:50 +01:00
mvebu pinctrl: mvebu: complain about missing group after checking variant 2015-12-09 16:15:07 +01:00
nomadik pinctrl: abx500: use gpiochip data pointer 2016-01-05 14:14:51 +01:00
pxa pinctrl: pxa: pxa2xx: add pin control skeleton 2015-12-15 14:07:06 +01:00
qcom GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
samsung GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
sh-pfc GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
sirf GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
spear GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
sunxi GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
uniphier pinctrl: uniphier: rework UniPhier pinctrl entries in Kconfig 2015-12-01 10:36:28 +01:00
vt8500 pinctrl: vt8500-wmt: use gpiochip data pointer 2016-01-05 14:15:08 +01:00
Kconfig Linux 4.4-rc5 2015-12-17 14:57:46 +01:00
Makefile pinctrl: activate pxa architecture 2015-12-10 16:14:03 +01:00
core.c drivers/pinctrl: Add the concept of an "init" state 2015-10-27 11:24:23 +01:00
core.h pinctrl: Don't just pretend to protect pinctrl_maps, do it for real 2015-05-06 16:24:28 +02:00
devicetree.c pinctrl: simplify of_pinctrl_get() 2015-07-16 09:39:03 +02:00
devicetree.h
pinconf-generic.c pinctrl: update document for pinconf_generic_parse_dt_config 2015-12-01 11:11:05 +01:00
pinconf.c pinctrl: pinconf: remove needless loop 2015-10-31 22:13:07 +01:00
pinconf.h pinctrl: pinconf-generic: Allow driver to specify DT params 2015-01-11 22:32:19 +01:00
pinctrl-adi2-bf54x.c pinctrl: pinctrl-adi: combine multiple groups of one function together 2014-02-25 10:49:13 +01:00
pinctrl-adi2-bf60x.c added tabs instead of spaces 2015-07-16 09:39:01 +02:00
pinctrl-adi2.c GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
pinctrl-adi2.h pinctrl: pinctrl-adi: combine multiple groups of one function together 2014-02-25 10:49:13 +01:00
pinctrl-amd.c pinctrl: amd: use gpiochip data pointer 2016-01-05 14:14:52 +01:00
pinctrl-amd.h Fix inconsistent spinlock of AMD GPIO driver which can be 2015-04-07 11:36:49 +02:00
pinctrl-as3722.c pinctrl: as3722: use gpiochip data pointer 2016-01-05 14:14:53 +01:00
pinctrl-at91-pio4.c GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
pinctrl-at91.c GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
pinctrl-at91.h pinctrl: at91: use own header 2014-10-29 09:28:35 +01:00
pinctrl-coh901.c pinctrl: u300: use gpiochip data pointer 2016-01-05 14:14:54 +01:00
pinctrl-coh901.h
pinctrl-digicolor.c pinctrl: digicolor: use gpiochip data pointer 2016-01-05 14:14:55 +01:00
pinctrl-falcon.c staging: drivers: pinctrl: Fixed checkpatch.pl warnings 2015-01-21 11:02:26 +01:00
pinctrl-lantiq.c pinctrl: make pinctrl_register() return proper error code 2015-06-10 14:49:52 +02:00
pinctrl-lantiq.h pinctrl/lantiq: introduce new dedicated devicetree bindings 2015-11-30 13:12:07 +01:00
pinctrl-lpc18xx.c This is the bulk of pin control changes for the v4.3 development 2015-09-04 10:22:09 -07:00
pinctrl-palmas.c pinctrl: make pinctrl_register() return proper error code 2015-06-10 14:49:52 +02:00
pinctrl-pistachio.c pinctrl: pistachio: use gpiochip data pointer 2016-01-05 14:14:55 +01:00
pinctrl-rockchip.c GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
pinctrl-single.c pinctrl: Delete unnecessary checks 2015-11-17 11:49:50 +01:00
pinctrl-st.c pinctrl: st: use gpiochip data pointer 2016-01-05 14:14:57 +01:00
pinctrl-tb10x.c pinctrl: make pinctrl_register() return proper error code 2015-06-10 14:49:52 +02:00
pinctrl-tegra-xusb.c pinctrl-tegra: add missing of_node_put 2015-12-22 13:44:00 +01:00
pinctrl-tegra.c pinctrl-tegra: add missing of_node_put 2015-12-22 13:44:00 +01:00
pinctrl-tegra.h pinctrl: tegra: use signed bitfields for optional fields 2015-03-19 09:20:17 +01:00
pinctrl-tegra20.c pinctrl: tegra: some bits move between registers 2015-03-09 18:10:58 +01:00
pinctrl-tegra30.c pinctrl: tegra: some bits move between registers 2015-03-09 18:10:58 +01:00
pinctrl-tegra114.c pinctrl: tegra: some bits move between registers 2015-03-09 18:10:58 +01:00
pinctrl-tegra124.c pinctrl: tegra: some bits move between registers 2015-03-09 18:10:58 +01:00
pinctrl-tegra210.c pinctrl: tegra: add a driver for Tegra210 2015-03-09 18:10:59 +01:00
pinctrl-tz1090-pdc.c pinctrl: tz1090-pdc: Remove unneded semicolons 2015-10-02 04:06:46 -07:00
pinctrl-tz1090.c pinctrl: tz1090: Remove unneded semicolons 2015-10-02 04:06:46 -07:00
pinctrl-u300.c pinctrl: make pinctrl_register() return proper error code 2015-06-10 14:49:52 +02:00
pinctrl-utils.c pinctrl: utils: include export.h to avoid warnings 2013-08-28 15:50:33 +02:00
pinctrl-utils.h pinctrl: add utility functions for add map/configs 2013-08-14 21:00:41 +02:00
pinctrl-xway.c GPIO bulk updates for the v4.5 kernel cycle: 2016-01-17 12:32:01 -08:00
pinctrl-zynq.c pinctrl: zynq: fix UTF-8 errors 2015-10-31 22:12:59 +01:00
pinmux.c pinctrl: join lines that can be a single line within 80 columns 2015-09-14 09:13:43 +02:00
pinmux.h