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Commit 2f94ced7 authored by Neil Armstrong's avatar Neil Armstrong Committed by Linus Walleij
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pinctrl: oxnas: Add GPIO get_direction 



Implement a get_direction callback for the OXNAS GPIO driver in order
to have pin output polarity in debugfs and new userspace ABI.

Signed-off-by: default avatarNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 2df723d4

drivers/pinctrl/pinctrl-oxnas.c

+11 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ 


/* GPIO Registers */

#define INPUT_VALUE	0x00

#define OUTPUT_EN	0x04

#define IRQ_PENDING	0x0c

#define OUTPUT_SET	0x14

#define OUTPUT_CLEAR	0x18
@@ -431,6 +432,15 @@ static int oxnas_gpio_request_enable(struct pinctrl_dev *pctldev, 
	return 0;

}



static int oxnas_gpio_get_direction(struct gpio_chip *chip,

				      unsigned int offset)

{

	struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);

	u32 mask = BIT(offset);



	return !(readl_relaxed(bank->reg_base + OUTPUT_EN) & mask);

}



static int oxnas_gpio_direction_input(struct gpio_chip *chip,

				      unsigned int offset)

{
@@ -664,6 +674,7 @@ static void oxnas_gpio_irq_handler(struct irq_desc *desc) 
			.label = "GPIO" #_bank,				\

			.request = gpiochip_generic_request,		\

			.free = gpiochip_generic_free,			\

			.get_direction = oxnas_gpio_get_direction,	\

			.direction_input = oxnas_gpio_direction_input,	\

			.direction_output = oxnas_gpio_direction_output, \

			.get = oxnas_gpio_get,				\