From 926b663ce8215ba448960e1ff6e58b67a2c3b99b Mon Sep 17 00:00:00 2001 From: Daniel Silverstone Date: Thu, 2 Apr 2009 16:57:05 -0700 Subject: gpiolib: allow GPIOs to be named Allow GPIOs in GPIOLIB chips to be named. This name is then used when the GPIO is exported to sysfs, although it could be used elsewhere if deemed useful. Signed-off-by: Daniel Silverstone Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/gpio/gpiolib.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 42fb2fd24c0c..83c3fe3a136b 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -438,6 +438,7 @@ int gpio_export(unsigned gpio, bool direction_may_change) unsigned long flags; struct gpio_desc *desc; int status = -EINVAL; + char *ioname = NULL; /* can't export until sysfs is available ... */ if (!gpio_class.p) { @@ -461,11 +462,14 @@ int gpio_export(unsigned gpio, bool direction_may_change) } spin_unlock_irqrestore(&gpio_lock, flags); + if (desc->chip->names && desc->chip->names[gpio - desc->chip->base]) + ioname = desc->chip->names[gpio - desc->chip->base]; + if (status == 0) { struct device *dev; dev = device_create(&gpio_class, desc->chip->dev, MKDEV(0, 0), - desc, "gpio%d", gpio); + desc, ioname ? ioname : "gpio%d", gpio); if (dev) { if (direction_may_change) status = sysfs_create_group(&dev->kobj, @@ -513,6 +517,7 @@ void gpio_unexport(unsigned gpio) mutex_lock(&sysfs_lock); desc = &gpio_desc[gpio]; + if (test_bit(FLAG_EXPORT, &desc->flags)) { struct device *dev = NULL; -- cgit v1.2.3