diff options
| author | Jani Nikula <ext-jani.1.nikula@nokia.com> | 2009-09-23 01:46:33 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 16:39:46 +0200 |
| commit | a4177ee7f1a83eecb1d75e85d32664b023ef65e9 (patch) | |
| tree | 614b12b1f28a1a9090d96bea33639265e3e79839 /include/asm-generic | |
| parent | rtc: add boot_timesource sysfs attribute (diff) | |
| download | linux-a4177ee7f1a83eecb1d75e85d32664b023ef65e9.tar.xz linux-a4177ee7f1a83eecb1d75e85d32664b023ef65e9.zip | |
gpiolib: allow exported GPIO nodes to be named using sysfs links
Commit 926b663ce8215ba448960e1ff6e58b67a2c3b99b (gpiolib: allow GPIOs to
be named) already provides naming on the chip level. This patch provides
more flexibility by allowing multiple names where ever in sysfs on a per
GPIO basis.
Adapted from David Brownell's comments on a similar concept:
http://lkml.org/lkml/2009/4/20/203.
[randy.dunlap@oracle.com: fix build for CONFIG_GENERIC_GPIO=n]
Signed-off-by: Jani Nikula <ext-jani.1.nikula@nokia.com>
Acked-by: David Brownell <david-b@pacbell.net>
Cc: Daniel Silverstone <dsilvers@simtec.co.uk>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/gpio.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index d6c379dc64fa..9cca3785cab8 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -141,6 +141,8 @@ extern int __gpio_to_irq(unsigned gpio); * but more typically is configured entirely from userspace. */ extern int gpio_export(unsigned gpio, bool direction_may_change); +extern int gpio_export_link(struct device *dev, const char *name, + unsigned gpio); extern void gpio_unexport(unsigned gpio); #endif /* CONFIG_GPIO_SYSFS */ @@ -185,6 +187,12 @@ static inline int gpio_export(unsigned gpio, bool direction_may_change) return -ENOSYS; } +static inline int gpio_export_link(struct device *dev, const char *name, + unsigned gpio) +{ + return -ENOSYS; +} + static inline void gpio_unexport(unsigned gpio) { } |