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dm: gpio: Add an implementation for gpio_get_number()

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This has a prototype but no implementation. It returns the global GPIO number
given a gpio_desc. It is useful for debugging in some cases.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Simon Glass 2015-03-25 12:21:58 -06:00
parent c5785673bc
commit 56a71f891b
1 changed files with 12 additions and 0 deletions
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12
drivers/gpio/gpio-uclass.c
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@ -685,6 +685,18 @@ static int gpio_renumber(struct udevice *removed_dev)
return 0;
}
int gpio_get_number(struct gpio_desc *desc)
{
struct udevice *dev = desc->dev;
struct gpio_dev_priv *uc_priv;
if (!dev)
return -1;
uc_priv = dev->uclass_priv;
return uc_priv->gpio_base + desc->offset;
}
static int gpio_post_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);