This patch introduces the function devm_request_gpio_array that allocates multiple GPIOs in a single call in a managed manner. The function is also included in the documentation and a declaration is added in include/linux/gpio.h.
Signed-off-by: Himangi Saraogi himangi774@gmail.com --- Documentation/driver-model/devres.txt | 1 + drivers/gpio/devres.c | 21 +++++++++++++++++++++ include/linux/gpio.h | 2 ++ 3 files changed, 24 insertions(+)
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index 9e2098e..756f6cf 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -337,6 +337,7 @@ GPIO devm_gpiod_put() devm_gpio_request() devm_gpio_request_one() + devm_gpio_request_array() devm_gpio_free()
SND diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c index 65978cf..adae7fa 100644 --- a/drivers/gpio/devres.c +++ b/drivers/gpio/devres.c @@ -229,6 +229,27 @@ int devm_gpio_request_one(struct device *dev, unsigned gpio, EXPORT_SYMBOL(devm_gpio_request_one);
/** + * devm_gpio_request_array - request multiple GPIOs in a single call + * @dev: device to request for + * @array: array of the 'struct gpio' + * @num: how many GPIOs in the array + */ +int devm_gpio_request_array(struct device *dev, const struct gpio *array, + size_t num) +{ + int i, err; + + for (i = 0; i < num; i++, array++) { + err = devm_gpio_request_one(dev, array->gpio, array->flags, + array->label); + if (err) + return err; + } + return 0; +} +EXPORT_SYMBOL_GPL(devm_gpio_request_array); + +/** * devm_gpio_free - free a GPIO * @dev: device to free GPIO for * @gpio: GPIO to free diff --git a/include/linux/gpio.h b/include/linux/gpio.h index 85aa5d0..c85f243 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -84,6 +84,8 @@ struct device; int devm_gpio_request(struct device *dev, unsigned gpio, const char *label); int devm_gpio_request_one(struct device *dev, unsigned gpio, unsigned long flags, const char *label); +int devm_gpio_request_array(struct device *dev, const struct gpio *array, + size_t num); void devm_gpio_free(struct device *dev, unsigned int gpio);
#else /* ! CONFIG_GPIOLIB */