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authorCaesar Wang <wxt@rock-chips.com>2016-03-15 15:55:45 +0800
committerLinus Walleij <linus.walleij@linaro.org>2016-04-13 15:26:02 +0200
commit6ba20a00a36bb47c64581bfa08f1606d4bf0589f (patch)
tree876c0031538ada3ef3425885a960cd0356a79379 /drivers/pinctrl/pinctrl-rockchip.c
parent658b476c742fe379e7020309fd590a27b457a4c1 (diff)
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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.c11
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,