diff options
| -rw-r--r-- | drivers/gpio/gpiolib.c | 7 | ||||
| -rw-r--r-- | include/asm-generic/gpio.h | 5 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 42fb2fd24c0..83c3fe3a136 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; diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 81797ec9ab2..d6c379dc64f 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -55,6 +55,10 @@ struct module; * handled is (base + ngpio - 1). * @can_sleep: flag must be set iff get()/set() methods sleep, as they * must while accessing GPIO expander chips over I2C or SPI + * @names: if set, must be an array of strings to use as alternative + * names for the GPIOs in this chip. Any entry in the array + * may be NULL if there is no alias for the GPIO, however the + * array must be @ngpio entries long. * * A gpio_chip can help platforms abstract various sources of GPIOs so * they can all be accessed through a common programing interface. @@ -92,6 +96,7 @@ struct gpio_chip { struct gpio_chip *chip); int base; u16 ngpio; + char **names; unsigned can_sleep:1; unsigned exported:1; }; |