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dm: gpio: Add dm_gpio_lookup_name() to look up a GPIO name

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Provide a driver-model function to look up a GPIO name. Make the standard
function use it.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2015-06-23 15:38:40 -06:00
parent ce22c5bbee
commit 32ec159844
2 changed files with 39 additions and 8 deletions
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13
include/asm-generic/gpio.h
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@ -321,6 +321,19 @@ struct gpio_dev_priv {
*/
const char *gpio_get_bank_info(struct udevice *dev, int *offset_count);
/**
* dm_gpio_lookup_name() - Look up a named GPIO and return its description
*
* The name of a GPIO is typically its bank name followed by a number from 0.
* For example A0 is the first GPIO in bank A. Each bank is a separate driver
* model device.
*
* @name: Name to look up
* @desc: Returns description, on success
* @return 0 if OK, -ve on error
*/
int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc);
/**
* gpio_lookup_name - Look up a GPIO name and return its details
*