[PATCH 01/11] gpiolib: of: add a fallback for wlf,reset GPIO name

[Dmitry Torokhov]

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.torok...@gmail.com>
---

 drivers/gpio/gpiolib-of.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index b45b39c48a34..8b773f7d7724 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -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)
 {
@@ -479,6 +492,9 @@ struct gpio_desc *of_find_gpio(struct device *dev, const 
char *con_id,
                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;
 
-- 
2.23.0.162.g0b9fbb3734-goog