diff options
Diffstat (limited to 'drivers/gpio/devres.c')
| -rw-r--r-- | drivers/gpio/devres.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c index 3dd29399cef5..9e9947cb86a3 100644 --- a/drivers/gpio/devres.c +++ b/drivers/gpio/devres.c @@ -71,6 +71,35 @@ int devm_gpio_request(struct device *dev, unsigned gpio, const char *label) EXPORT_SYMBOL(devm_gpio_request); /** + * devm_gpio_request_one - request a single GPIO with initial setup + * @dev: device to request for + * @gpio: the GPIO number + * @flags: GPIO configuration as specified by GPIOF_* + * @label: a literal description string of this GPIO + */ +int devm_gpio_request_one(struct device *dev, unsigned gpio, + unsigned long flags, const char *label) +{ + unsigned *dr; + int rc; + + dr = devres_alloc(devm_gpio_release, sizeof(unsigned), GFP_KERNEL); + if (!dr) + return -ENOMEM; + + rc = gpio_request_one(gpio, flags, label); + if (rc) { + devres_free(dr); + return rc; + } + + *dr = gpio; + devres_add(dev, dr); + + return 0; +} + +/** * devm_gpio_free - free an interrupt * @dev: device to free gpio for * @gpio: gpio to free @@ -83,8 +112,7 @@ EXPORT_SYMBOL(devm_gpio_request); void devm_gpio_free(struct device *dev, unsigned int gpio) { - WARN_ON(devres_destroy(dev, devm_gpio_release, devm_gpio_match, + WARN_ON(devres_release(dev, devm_gpio_release, devm_gpio_match, &gpio)); - gpio_free(gpio); } EXPORT_SYMBOL(devm_gpio_free); |