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Commit 195812e4 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Linus Walleij
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gpio: tegra: read output value when gpio is set in direction_out 



Read the output value when gpio is set for the output mode for
gpio_get_value(). Reading input value in direction out does not
give correct value.

Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent ed32620e

drivers/gpio/gpio-tegra.c

+5 −0
Original line number Diff line number Diff line
@@ -134,6 +134,11 @@ static void tegra_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 


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

{

	/* If gpio is in output mode then read from the out value */

	if ((tegra_gpio_readl(GPIO_OE(offset)) >> GPIO_BIT(offset)) & 1)

		return (tegra_gpio_readl(GPIO_OUT(offset)) >>

				GPIO_BIT(offset)) & 0x1;



	return (tegra_gpio_readl(GPIO_IN(offset)) >> GPIO_BIT(offset)) & 0x1;

}