From 2956b5d94a76b596fa5057c2b3ca915cb27d7652 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Mon, 23 Jan 2017 15:34:34 +0300 Subject: pinctrl / gpio: Introduce .set_config() callback for GPIO chips Currently we already have two pin configuration related callbacks available for GPIO chips .set_single_ended() and .set_debounce(). In future we expect to have even more, which does not scale well if we need to add yet another callback to the GPIO chip structure for each possible configuration parameter. Better solution is to reuse what we already have available in the generic pinconf. To support this, we introduce a new .set_config() callback for GPIO chips. The callback takes a single packed pin configuration value as parameter. This can then be extended easily beyond what is currently supported by just adding new types to the generic pinconf enum. If the GPIO driver is backed up by a pinctrl driver the GPIO driver can just assign gpiochip_generic_config() (introduced in this patch) to .set_config and that will take care configuration requests are directed to the pinctrl driver. We then convert the existing drivers over .set_config() and finally remove the .set_single_ended() and .set_debounce() callbacks. Suggested-by: Linus Walleij Signed-off-by: Mika Westerberg Reviewed-by: Andy Shevchenko Signed-off-by: Linus Walleij --- drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'drivers/pinctrl/mediatek/pinctrl-mtk-common.c') diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c index f9aef2ac03a1..3cf384f8b122 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c @@ -1054,6 +1054,18 @@ static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset, return 0; } +static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned offset, + unsigned long config) +{ + u32 debounce; + + if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE) + return -ENOTSUPP; + + debounce = pinconf_to_config_argument(config); + return mtk_gpio_set_debounce(chip, offset, debounce); +} + static const struct gpio_chip mtk_gpio_chip = { .owner = THIS_MODULE, .request = gpiochip_generic_request, @@ -1064,7 +1076,7 @@ static const struct gpio_chip mtk_gpio_chip = { .get = mtk_gpio_get, .set = mtk_gpio_set, .to_irq = mtk_gpio_to_irq, - .set_debounce = mtk_gpio_set_debounce, + .set_config = mtk_gpio_set_config, .of_gpio_n_cells = 2, }; -- cgit v1.2.3