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pinctrl: Allow configuration of pins from gpiolib based drivers

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When a GPIO driver is backed by a pinctrl driver the GPIO driver
sometimes needs to call the pinctrl driver to configure certain things,
like whether the pin is used as input or output. In addition to this
there are other configurations applicable to GPIOs such as setting
debounce time of the GPIO.

To support this we introduce a new function pinctrl_gpio_set_config()
that can be used by gpiolib based driver to pass configuration requests
to the backing pinctrl driver.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Mika Westerberg 2017-01-23 15:34:33 +03:00 • committed by Linus Walleij
parent 58957d2edf
commit 15381bc7c7
4 changed files with 56 additions and 0 deletions
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6
include/linux/pinctrl/consumer.h
View file

@ -29,6 +29,7 @@ extern int pinctrl_request_gpio(unsigned gpio);
extern void pinctrl_free_gpio(unsigned gpio);
extern int pinctrl_gpio_direction_input(unsigned gpio);
extern int pinctrl_gpio_direction_output(unsigned gpio);
extern int pinctrl_gpio_set_config(unsigned gpio, unsigned long config);
extern struct pinctrl * __must_check pinctrl_get(struct device *dev);
extern void pinctrl_put(struct pinctrl *p);
@ -80,6 +81,11 @@ static inline int pinctrl_gpio_direction_output(unsigned gpio)
return 0;
}
static inline int pinctrl_gpio_set_config(unsigned gpio, unsigned long config)
{
return 0;
}
static inline struct pinctrl * __must_check pinctrl_get(struct device *dev)
{
return NULL;