From 0bf713e53a1f2556e66f76a368476e233e5ab89d Mon Sep 17 00:00:00 2001 From: Ahmad Fatoum Date: Mon, 17 Jun 2019 17:07:42 +0200 Subject: gpiolib: add gpio_get_chip helper Pinctrl nodes adhering to the generic pinctrl bindings may contain properties like input-low/input-high, which require pinctrl_ops.set_state to have a handle on the relevant gpio chip. Currently this would lead to code duplication: Both the pinctrl driver and gpiolib will need to store a list of registered gpiochips. Avoid this by providing a helper to query the registered gpio_chip given a gpio's number. Signed-off-by: Ahmad Fatoum Signed-off-by: Sascha Hauer --- drivers/gpio/gpiolib.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 4c7aee4a0b..f96009896a 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -475,6 +475,13 @@ int gpio_get_num(struct device_d *dev, int gpio) return -EPROBE_DEFER; } +struct gpio_chip *gpio_get_chip(int gpio) +{ + struct gpio_info *gi = gpio_to_desc(gpio); + + return gi ? gi->chip : NULL; +} + #ifdef CONFIG_CMD_GPIO static int do_gpiolib(int argc, char *argv[]) { -- cgit v1.2.3