13 Feb, 2007

1 commit

• 4c20386c8   [PATCH] GPIO core ... Browse Code »

  This defines a simple and minimalist programming interface for GPIO APIs:

  - Documentation/gpio.txt ... describes things (read it)

  - include/asm-arm/gpio.h ... defines the ARM hook, which just punts
  to for any implementation

  - include/asm-generic/gpio.h ... implement "can sleep" variants as calling
  the normal ones, for systems that don't handle i2c expanders.

  The immediate need for such a cross-architecture API convention is to support
  drivers that work the same on AT91 ARM and AVR32 AP7000 chips, which embed many
  of the same controllers but have different CPUs. However, several other users
  have been reported, including a driver for a hardware watchdog chip and some
  handhelds.org multi-CPU button drivers.

  Signed-off-by: David Brownell
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  David Brownell

  2007-02-13 01:48:34 +0800