From a4177ee7f1a83eecb1d75e85d32664b023ef65e9 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Tue, 22 Sep 2009 16:46:33 -0700 Subject: 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 Acked-by: David Brownell Cc: Daniel Silverstone Signed-off-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/gpio.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/asm-generic') 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) { } -- cgit v1.2.3