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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: Laxman Dewangan <ldewangan@nvidia.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -134,6 +134,11 @@ static void tegra_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
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static int tegra_gpio_get(struct gpio_chip *chip, unsigned offset)
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{
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/* If gpio is in output mode then read from the out value */
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if ((tegra_gpio_readl(GPIO_OE(offset)) >> GPIO_BIT(offset)) & 1)
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return (tegra_gpio_readl(GPIO_OUT(offset)) >>
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GPIO_BIT(offset)) & 0x1;
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return (tegra_gpio_readl(GPIO_IN(offset)) >> GPIO_BIT(offset)) & 0x1;
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}
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