diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-11-09 07:04:20 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2012-11-17 21:14:04 +0100 |
| commit | 195812e4b6a631e8eaad4046bf6890db4328ea1f (patch) | |
| tree | 1dd479a38f8a5fc49c25d9499a61017fc41cdc63 /drivers/gpio/gpio-tegra.c | |
| parent | gpio: pca953x: Add compatible strings to gpio-pca953x driver (diff) | |
| download | linux-195812e4b6a631e8eaad4046bf6890db4328ea1f.tar.xz linux-195812e4b6a631e8eaad4046bf6890db4328ea1f.zip | |
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>
Diffstat (limited to 'drivers/gpio/gpio-tegra.c')
| -rw-r--r-- | drivers/gpio/gpio-tegra.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index cfd9b723002b..5389be8c2b51 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -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; } |