[PATCH v4 2/6] gpio: re-add of_node_to_gpiochip function
From: Dong Aisheng <hidden>
Date: 2012-05-25 13:34:22
Also in:
linux-devicetree, lkml
Subsystem:
gpio subsystem, open firmware and flattened device tree, the rest · Maintainers:
Linus Walleij, Bartosz Golaszewski, Rob Herring, Saravana Kannan, Linus Torvalds
From: Dong Aisheng <redacted> Signed-off-by: Dong Aisheng <redacted> --- drivers/gpio/gpiolib-of.c | 11 +++++++++++ include/linux/of_gpio.h | 5 +++++ 2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 8389d4a..b8010a9 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c@@ -234,3 +234,14 @@ void of_gpiochip_remove(struct gpio_chip *chip) if (chip->of_node) of_node_put(chip->of_node); } + +/* Private function for resolving node pointer to gpio_chip */ +static int of_gpiochip_is_match(struct gpio_chip *chip, void *data) +{ + return chip->of_node == data; +} + +struct gpio_chip *of_node_to_gpiochip(struct device_node *np) +{ + return gpiochip_find(np, of_gpiochip_is_match); +}
diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h
index c454f57..880783b 100644
--- a/include/linux/of_gpio.h
+++ b/include/linux/of_gpio.h@@ -61,6 +61,7 @@ extern void of_gpiochip_remove(struct gpio_chip *gc); extern int of_gpio_simple_xlate(struct gpio_chip *gc, const struct of_phandle_args *gpiospec, u32 *flags); +extern struct gpio_chip *of_node_to_gpiochip(struct device_node *np); #else /* CONFIG_OF_GPIO */
@@ -84,6 +85,10 @@ static inline int of_gpio_simple_xlate(struct gpio_chip *gc, return -ENOSYS; } +static struct gpio_chip *of_node_to_gpiochip(struct device_node *np) +{ + return NULL; +} static inline void of_gpiochip_add(struct gpio_chip *gc) { } static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
--
1.7.0.4