Commit 20b3d2a7 authored by Stefan Wahren's avatar Stefan Wahren Committed by Linus Walleij
Browse files

pinctrl: bcm2835: Implement get_direction callback 



Implement gpio_chip's get_direction() callback, that lets other
drivers get particular GPIOs direction using gpiod_get_direction().

Signed-off-by: default avatarStefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: default avatarEric Anholt <eric@anholt.net>
Reviewed-by: default avatarStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 42a44402

drivers/pinctrl/bcm/pinctrl-bcm2835.c

+13 −0
Original line number Diff line number Diff line
@@ -342,6 +342,18 @@ static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset) 
	return bcm2835_gpio_get_bit(pc, GPLEV0, offset);

}



static int bcm2835_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)

{

	struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);

	enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);



	/* Alternative function doesn't clearly provide a direction */

	if (fsel > BCM2835_FSEL_GPIO_OUT)

		return -EINVAL;



	return (fsel == BCM2835_FSEL_GPIO_IN);

}



static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

{

	struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
@@ -370,6 +382,7 @@ static struct gpio_chip bcm2835_gpio_chip = { 
	.free = gpiochip_generic_free,

	.direction_input = bcm2835_gpio_direction_input,

	.direction_output = bcm2835_gpio_direction_output,

	.get_direction = bcm2835_gpio_get_direction,

	.get = bcm2835_gpio_get,

	.set = bcm2835_gpio_set,

	.to_irq = bcm2835_gpio_to_irq,

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