diff options
| author | Seongho Joo <sjoo@nvidia.com> | 2011-06-16 00:09:21 +0900 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:47:26 -0800 |
| commit | 27ad502db3f5187b442c4077090b63af7b2fcfb6 (patch) | |
| tree | c6e615efb284fe9722165fa395c9bfe9a6406dc0 /drivers/gpio | |
| parent | 8a3949c945142e438874b2d75ded6ed25f8a3ded (diff) | |
arm: tegra: gpio_get_value can read output gpio
gpio_get_value only supports input pin.
extend the usage for output pin.
Bug 839772
Original-Change-Id: I5a8f5572148afde23e082af18f2e37377ae50bd1
Reviewed-on: http://git-master/r/36758
Tested-by: Seongho Joo <sjoo@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Scott Williams <scwilliams@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Rebase-Id: R021e8ff272e4cecd855a574b008dbf8663378970
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-tegra.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index e42ebe0be017..40a813c29968 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -138,6 +138,8 @@ 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 (( __raw_readl(GPIO_OE(offset)) >> GPIO_BIT(offset)) & 0x1) + return (__raw_readl(GPIO_OUT(offset)) >> GPIO_BIT(offset)) & 0x1; return (__raw_readl(GPIO_IN(offset)) >> GPIO_BIT(offset)) & 0x1; } |