linux.git/drivers/gpio/Kconfig, branch v4.18

gpio: Remove VLA from gpiolib

2018-05-23T12:01:03+00:00

The new challenge is to remove VLAs from the kernel
(see https://lkml.org/lkml/2018/3/7/621) to eventually
turn on -Wvla.

Using a kmalloc array is the easy way to fix this but kmalloc is still
more expensive than stack allocation. Introduce a fast path with a
fixed size stack array to cover most chip with gpios below some fixed
amount. The slow path dynamically allocates an array to cover those
chips with a large number of gpios.

Reviewed-by: Geert Uytterhoeven 
Reviewed-by: Phil Reid 
Reviewed-and-tested-by: Lukas Wunner 
Signed-off-by: Lukas Wunner 
Signed-off-by: Laura Abbott 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Linus Walleij

Merge tag 'gpio-v4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

2018-04-05T16:51:41+00:00

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v4.17 kernel cycle:

  New drivers:

   - Nintendo Wii GameCube GPIO, known as "Hollywood"

   - Raspberry Pi mailbox service GPIO expander

   - Spreadtrum main SC9860 SoC and IEC GPIO controllers.

  Improvements:

   - Implemented .get_multiple() callback for most of the
     high-performance industrial GPIO cards for the ISA bus.

   - ISA GPIO drivers now select the ISA_BUS_API instead of depending on
     it. This is merged with the same pattern for all the ISA drivers
     and some other Kconfig cleanups related to this.

  Cleanup:

   - Delete the TZ1090 GPIO drivers following the deletion of this SoC
     from the ARM tree.

   - Move the documentation over to driver-api to conform with the rest
     of the kernel documentation build.

   - Continue to make the GPIO drivers include only
      and not the too broad  that we
     want to get rid of.

   - Managed to remove VLA allocation from two drivers pending more
     fixes in this area for the next merge window.

   - Misc janitorial fixes"

* tag 'gpio-v4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (77 commits)
  gpio: Add Spreadtrum PMIC EIC driver support
  gpio: Add Spreadtrum EIC driver support
  dt-bindings: gpio: Add Spreadtrum EIC controller documentation
  gpio: ath79: Fix potential NULL dereference in ath79_gpio_probe()
  pinctrl: qcom: Don't allow protected pins to be requested
  gpiolib: Support 'gpio-reserved-ranges' property
  gpiolib: Change bitmap allocation to kmalloc_array
  gpiolib: Extract mask allocation into subroutine
  dt-bindings: gpio: Add a gpio-reserved-ranges property
  gpio: mockup: fix a potential crash when creating debugfs entries
  gpio: pca953x: add compatibility for pcal6524 and pcal9555a
  gpio: dwapb: Add support for a bus clock
  gpio: Remove VLA from xra1403 driver
  gpio: Remove VLA from MAX3191X driver
  gpio: ws16c48: Implement get_multiple callback
  gpio: gpio-mm: Implement get_multiple callback
  gpio: 104-idi-48: Implement get_multiple callback
  gpio: 104-dio-48e: Implement get_multiple callback
  gpio: pcie-idio-24: Implement get_multiple/set_multiple callbacks
  gpio: pci-idio-16: Implement get_multiple callback
  ...

gpio: Add Spreadtrum PMIC EIC driver support

2018-03-27T13:51:22+00:00

The Spreadtrum PMIC EIC controller contains only one bank of debounce EIC,
and this bank contains 16 EICs. Each EIC can only be used as input mode,
as well as supporting the debounce and the capability to trigger interrupts
when detecting input signals.

Signed-off-by: Baolin Wang 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Linus Walleij

gpio: Add Spreadtrum EIC driver support

2018-03-27T13:51:17+00:00

The Spreadtrum digital-chip EIC controller has 4 sub-modules: debounce EIC,
latch EIC, async EIC and sync EIC, and each sub-module can has multiple
banks and each bank contains 8 EICs.

Each EIC can only be used as input mode, and has the capability to trigger
interrupts when detecting input signals.

Signed-off-by: Baolin Wang 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Linus Walleij

gpio: remove etraxfs driver

2018-03-26T13:56:53+00:00

The cris architecture is getting removed, so we no longer need the
etraxfs driver.

Signed-off-by: Arnd Bergmann

gpio: raspberrypi-exp: explain Kconfig dependency

2018-03-02T12:00:30+00:00

Commit 7ed915059c3001 (gpio: raspberrypi-ext: fix firmware dependency)
fixed the Kconfig dependency to ensure that gpio-raspberrypi-exp is not
built-in when the firmware is a module. But the Kconfig syntax for doing
so is cryptic. Add a comment to make it a little easier.

Cc: Arnd Bergmann 
Signed-off-by: Baruch Siach 
Signed-off-by: Linus Walleij

gpio: Add GPIO driver for Spreadtrum SC9860 platform

2018-03-02T10:00:43+00:00

The Spreadtrum SC9860 platform GPIO controller contains 16 groups and
each group contains 16 GPIOs. Each GPIO can set input/output and has
the interrupt capability.

Signed-off-by: Baolin Wang 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Linus Walleij

gpio: raspberrypi-ext: fix firmware dependency

2018-03-02T08:46:45+00:00

When the firmware driver is a loadable module, the gpio driver cannot be
built-in:

drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_set':
gpio-raspberrypi-exp.c:(.text+0xb4): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_get':
gpio-raspberrypi-exp.c:(.text+0x1ec): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_get_direction':
gpio-raspberrypi-exp.c:(.text+0x360): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_get_polarity':
gpio-raspberrypi-exp.c:(.text+0x4d4): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_dir_out':
gpio-raspberrypi-exp.c:(.text+0x670): undefined reference to `rpi_firmware_property'
drivers/gpio/gpio-raspberrypi-exp.o:gpio-raspberrypi-exp.c:(.text+0x7fc): more undefined references to `rpi_firmware_property' follow
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_dir_in':
drivers/gpio/gpio-raspberrypi-exp.o: In function `rpi_exp_gpio_probe':
gpio-raspberrypi-exp.c:(.text+0x93c): undefined reference to `rpi_firmware_get'

We already have a Kconfig dependency for it, but when compile-testing, it
is disregarded.

This changes the dependency so that compile-testing is only done when the
firmware driver is completely disabled.

Fixes: a98d90e7d588 ("gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service")
Signed-off-by: Arnd Bergmann 
Signed-off-by: Linus Walleij

gpio: Drop TZ1090 drivers

2018-03-01T14:31:02+00:00

Now that arch/metag/ has been removed, along with TZ1090 SoC support,
remove the TZ1090 GPIO drivers. They are of no value without the
architecture and SoC platform code.

Signed-off-by: James Hogan 
Cc: linux-gpio@vger.kernel.org
Cc: linux-metag@vger.kernel.org
Signed-off-by: Linus Walleij

Revert "gpio: winbond: fix ISA_BUS_API dependency"

2018-02-26T10:27:30+00:00

This reverts commit 92a8046c9d952a2a7d21dfcd3afadc72a0bc0f72.

Now that the patch series changing ISA_BUS_API dependency to selection
was merged this reversion will do the same for gpio-winbond driver to
make it consistent with other ISA bus gpio drivers.

Signed-off-by: Maciej S. Szmigiero 
Signed-off-by: Linus Walleij