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authorDavid Brownell <david-b@pacbell.net>2007-02-12 00:53:11 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:34 -0800
commit4c20386c8d0719b42503efe65abe47ad3fb3d711 (patch)
tree9ec169c4c8548a9c2ac5c258c15020c346b969e1 /README
parent9794f33ddedd878dd92fcf8b4834391840366919 (diff)
[PATCH] GPIO core
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 <asm/arch/gpio.h> 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 <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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