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Commit c65d1fd3 authored by Russell King's avatar Russell King Committed by Linus Walleij
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gpio: sa1100: implement get_direction method 



Allow gpiolib to read back the current IO direction configuration by
implementing the .get_direction callback.  This, in part, allows
debugfs to report the complete true hardware state rather than the
software state.

Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 07242b24

drivers/gpio/gpio-sa1100.c

+8 −0
Original line number Diff line number Diff line
@@ -52,6 +52,13 @@ static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 
	writel_relaxed(BIT(offset), sa1100_gpio_chip(chip)->membase + reg);

}



static int sa1100_get_direction(struct gpio_chip *chip, unsigned offset)

{

	void __iomem *gpdr = sa1100_gpio_chip(chip)->membase + R_GPDR;



	return !(readl_relaxed(gpdr) & BIT(offset));

}



static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)

{

	void __iomem *gpdr = sa1100_gpio_chip(chip)->membase + R_GPDR;
@@ -85,6 +92,7 @@ static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset) 
static struct sa1100_gpio_chip sa1100_gpio_chip = {

	.chip = {

		.label			= "gpio",

		.get_direction		= sa1100_get_direction,

		.direction_input	= sa1100_direction_input,

		.direction_output	= sa1100_direction_output,

		.set			= sa1100_gpio_set,