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Commit 67e6d3e8 authored by Javier Arteaga's avatar Javier Arteaga Committed by Linus Walleij
Browse files

pinctrl: intel: Implement intel_gpio_get_direction callback 



Allows querying GPIO direction from the pad config register.
If the pad is not in GPIO mode, return an error.

Signed-off-by: default avatarJavier Arteaga <javier@emutex.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 86822c2f

drivers/pinctrl/intel/pinctrl-intel.c

+19 −0
Original line number Diff line number Diff line
@@ -788,6 +788,24 @@ static void intel_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 
	raw_spin_unlock_irqrestore(&pctrl->lock, flags);

}



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

{

	struct intel_pinctrl *pctrl = gpiochip_get_data(chip);

	void __iomem *reg;

	u32 padcfg0;



	reg = intel_get_padcfg(pctrl, offset, PADCFG0);

	if (!reg)

		return -EINVAL;



	padcfg0 = readl(reg);



	if (padcfg0 & PADCFG0_PMODE_MASK)

		return -EINVAL;



	return !!(padcfg0 & PADCFG0_GPIOTXDIS);

}



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

{

	return pinctrl_gpio_direction_input(chip->base + offset);
@@ -804,6 +822,7 @@ static const struct gpio_chip intel_gpio_chip = { 
	.owner = THIS_MODULE,

	.request = gpiochip_generic_request,

	.free = gpiochip_generic_free,

	.get_direction = intel_gpio_get_direction,

	.direction_input = intel_gpio_direction_input,

	.direction_output = intel_gpio_direction_output,

	.get = intel_gpio_get,