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dm: gpio: Add dm_gpio_request() to manually request a GPIO

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This function can be used for testing to manually request a GPIO for use,
without resorting to the legacy GPIO API.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-06-23 15:38:41 -06:00
parent 32ec159844
commit efa677fb48
2 changed files with 13 additions and 1 deletions
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2
drivers/gpio/gpio-uclass.c
View File

@ -127,7 +127,7 @@ static int gpio_find_and_xlate(struct gpio_desc *desc,
return ops->xlate ? ops->xlate(desc->dev, desc, args) : 0;
}
static int dm_gpio_request(struct gpio_desc *desc, const char *label)
int dm_gpio_request(struct gpio_desc *desc, const char *label)
{
struct udevice *dev = desc->dev;
struct gpio_dev_priv *uc_priv;

12
include/asm-generic/gpio.h
View File

@ -433,6 +433,18 @@ int gpio_request_list_by_name(struct udevice *dev, const char *list_name,
struct gpio_desc *desc_list, int max_count,
int flags);
/**
* dm_gpio_request() - manually request a GPIO
*
* Note: This function should only be used for testing / debugging. Instead.
* use gpio_request_by_name() to pull GPIOs from the device tree.
*
* @desc: GPIO description of GPIO to request (see dm_gpio_lookup_name())
* @label: Label to attach to the GPIO while claimed
* @return 0 if OK, -ve on error
*/
int dm_gpio_request(struct gpio_desc *desc, const char *label);
/**
* gpio_get_list_count() - Returns the number of GPIOs in a list
*