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gpiolib: of: add a fallback for wlf,reset GPIO name

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The old Arizona binding did not use -gpio or -gpios suffix, so
devm_gpiod_get() does not work for it. As it is the one of a few users
of devm_gpiod_get_from_of_node() API that I want to remove, I'd rather
have a small quirk in the gpiolib OF handler, and switch Arizona
driver to devm_gpiod_get().

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20190911075215.78047-2-dmitry.torokhov@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Dmitry Torokhov 2019-09-11 00:52:05 -07:00 committed by Linus Walleij
parent c34a024e4e
commit 11c43bb022
1 changed files with 16 additions and 0 deletions
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16
drivers/gpio/gpiolib-of.c
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@ -438,6 +438,19 @@ static struct gpio_desc *of_find_regulator_gpio(struct device *dev, const char *
return desc;
}
static struct gpio_desc *of_find_arizona_gpio(struct device *dev,
const char *con_id,
enum of_gpio_flags *of_flags)
{
if (!IS_ENABLED(CONFIG_MFD_ARIZONA))
return ERR_PTR(-ENOENT);
if (!con_id || strcmp(con_id, "wlf,reset"))
return ERR_PTR(-ENOENT);
return of_get_named_gpiod_flags(dev->of_node, con_id, 0, of_flags);
}
struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
unsigned int idx, unsigned long *flags)
{
@ -488,6 +501,9 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER)
desc = of_find_regulator_gpio(dev, con_id, &of_flags);
if (IS_ERR(desc) && PTR_ERR(desc) == -ENOENT)
desc = of_find_arizona_gpio(dev, con_id, &of_flags);
if (IS_ERR(desc))
return desc;