diff options
| author | David Brownell <david-b@pacbell.net> | 2008-03-04 14:28:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-04 16:35:10 -0800 |
| commit | 7560fa60fcdcdb0da662f6a9fad9064b554ef46c (patch) | |
| tree | 2089d826b0b9230752f318b20884dca20b3847d5 /Documentation/sparse.txt | |
| parent | 83c7c693ed3e61535ad6a097ad991a88aafc54b8 (diff) | |
gpio: <linux/gpio.h> and "no GPIO support here" stubs
Add a <linux/gpio.h> defining fail/warn stubs for GPIO calls on platforms that
don't support the GPIO programming interface. That includes the arch-specific
implementation glue otherwise.
This facilitates a new model for GPIO usage: drivers that can use GPIOs if
they're available, but don't require them. One example of such a driver is
NAND driver for various FreeScale chips. On platforms update with GPIO
support, they can be used instead of a worst-case delay to verify that the
BUSY signal is off.
(Also includes a couple minor unrelated doc updates.)
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>
Diffstat (limited to 'Documentation/sparse.txt')
0 files changed, 0 insertions, 0 deletions