diff options
| author | Caesar Wang <wxt@rock-chips.com> | 2016-03-15 15:55:45 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-04-13 15:26:02 +0200 |
| commit | 6ba20a00a36bb47c64581bfa08f1606d4bf0589f (patch) | |
| tree | 876c0031538ada3ef3425885a960cd0356a79379 /drivers/pinctrl/pinctrl-rockchip.c | |
| parent | 658b476c742fe379e7020309fd590a27b457a4c1 (diff) | |
| download | linux-6ba20a00a36bb47c64581bfa08f1606d4bf0589f.tar.gz linux-6ba20a00a36bb47c64581bfa08f1606d4bf0589f.tar.bz2 linux-6ba20a00a36bb47c64581bfa08f1606d4bf0589f.zip | |
pinctrl: rockchip: add support the get_direction
This patch adds the get_direction to support the gpio
interface.
The gpio direction is not used on rockchip platform when use the gpio
debugfs.
Tested on kylin board. (RK3036 SoCs)
The repro steps:
$/sys/class/gpio/
echo 53 > export
$/sys/class/gpio/gpio53# cat direction
in
In general, the gpio53 should be out value, but the direction is the
default value 'in', since the get_direction didn't supported in rockchip
pinctrl.
So, we should add this patch to support it.
Cc: linux-gpio@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
Reported-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-rockchip.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-rockchip.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index bf032b9b4c57..0b3fd02c069f 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -1208,6 +1208,16 @@ static int rockchip_pmx_set(struct pinctrl_dev *pctldev, unsigned selector, return 0; } +static int rockchip_gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + struct rockchip_pin_bank *bank = gpiochip_get_data(chip); + u32 data; + + data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); + + return !(data & BIT(offset)); +} + /* * The calls to gpio_direction_output() and gpio_direction_input() * leads to this function call (via the pinctrl_gpio_direction_{input|output}() @@ -1741,6 +1751,7 @@ static const struct gpio_chip rockchip_gpiolib_chip = { .free = gpiochip_generic_free, .set = rockchip_gpio_set, .get = rockchip_gpio_get, + .get_direction = rockchip_gpio_get_direction, .direction_input = rockchip_gpio_direction_input, .direction_output = rockchip_gpio_direction_output, .to_irq = rockchip_gpio_to_irq, |