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pinctrl: bcm2835: Implement get_direction callback

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

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Stefan Wahren 2016-03-28 14:58:24 +00:00 committed by Linus Walleij
parent 42a44402ec
commit 20b3d2a79f
1 changed files with 13 additions and 0 deletions
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13
drivers/pinctrl/bcm/pinctrl-bcm2835.c
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@ -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,