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pinctrl: meson: implement the gpio_chip get_direction callback

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Implement the get_direction callback so we read the direction from the
actual GPIO controller register. This is recommended by the gpio_chip
kernel doc.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20200417183349.1283092-2-martin.blumenstingl@googlemail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Martin Blumenstingl 2020-04-17 20:33:48 +02:00 committed by Linus Walleij
parent 4e3ec9e407
commit ef1d0bce38
1 changed files with 13 additions and 0 deletions
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13
drivers/pinctrl/meson/pinctrl-meson.c
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@ -549,6 +549,18 @@ static const struct pinconf_ops meson_pinconf_ops = {
.is_generic = true,
};
static int meson_gpio_get_direction(struct gpio_chip *chip, unsigned gpio)
{
struct meson_pinctrl *pc = gpiochip_get_data(chip);
int ret;
ret = meson_pinconf_get_output(pc, gpio);
if (ret < 0)
return ret;
return ret ? GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN;
}
static int meson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
return meson_pinconf_set_output(gpiochip_get_data(chip), gpio, false);
@ -591,6 +603,7 @@ static int meson_gpiolib_register(struct meson_pinctrl *pc)
pc->chip.parent = pc->dev;
pc->chip.request = gpiochip_generic_request;
pc->chip.free = gpiochip_generic_free;
pc->chip.get_direction = meson_gpio_get_direction;
pc->chip.direction_input = meson_gpio_direction_input;
pc->chip.direction_output = meson_gpio_direction_output;
pc->chip.get = meson_gpio_get;