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: 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>
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@ -342,6 +342,18 @@ static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset)
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return bcm2835_gpio_get_bit(pc, GPLEV0, offset);
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}
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static int bcm2835_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
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{
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struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
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enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);
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/* Alternative function doesn't clearly provide a direction */
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if (fsel > BCM2835_FSEL_GPIO_OUT)
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return -EINVAL;
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return (fsel == BCM2835_FSEL_GPIO_IN);
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}
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static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
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{
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struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
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@ -370,6 +382,7 @@ static struct gpio_chip bcm2835_gpio_chip = {
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.free = gpiochip_generic_free,
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.direction_input = bcm2835_gpio_direction_input,
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.direction_output = bcm2835_gpio_direction_output,
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.get_direction = bcm2835_gpio_get_direction,
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.get = bcm2835_gpio_get,
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.set = bcm2835_gpio_set,
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.to_irq = bcm2835_gpio_to_irq,
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