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gpio: Add WM831X GPIO driver

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Add support for the GPIO pins on the WM831x. No direct support is
currently supplied for configuring non-gpiolib functionality such
as pull configuration and alternate functions, soft configuration
of these will be provided in a future patch.

Currently use of these pins as interrupts is not supported due to
the ongoing issues with generic irq not support interrupt controllers
on interrupt driven buses. Users can directly request the interrupts
with the wm831x-specific APIs currently provided if required.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown
2009-07-27 14:46:00 +01:00
committed by Samuel Ortiz
parent b11062b9c5
commit e4b736f18f
4 changed files with 315 additions and 0 deletions
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7
drivers/gpio/Kconfig
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@@ -155,6 +155,13 @@ config GPIO_TWL4030
Say yes here to access the GPIO signals of various multi-function
power management chips from Texas Instruments.
config GPIO_WM831X
tristate "WM831x GPIOs"
depends on MFD_WM831X
help
Say yes here to access the GPIO signals of WM831x power management
chips from Wolfson Microelectronics.
comment "PCI GPIO expanders:"
config GPIO_BT8XX