| Message ID | 1457934266-29862-1-git-send-email-wxt@rock-chips.com |
|---|---|
| State | New |
| Headers | show |
在 2016年03月14日 13:44, Caesar Wang 写道: > 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. > > Change-Id: I237c2e85ac7680b3d0de15bbbb923985b4827def Resend it since the change id, sorry for the noise. > Reported-by: Jeffy Chen <jeffy.chen@rock-chips.com> > Signed-off-by: Caesar Wang <wxt@rock-chips.com> > Cc: Linus Walleij <linus.walleij@linaro.org> > Cc: Heiko Stuebner <heiko@sntech.de> > Cc: linux-gpio@vger.kernel.org > Cc: linux-rockchip@lists.infradead.org > --- > drivers/pinctrl/pinctrl-rockchip.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c > index bf032b9..f22a186 100644 > --- a/drivers/pinctrl/pinctrl-rockchip.c > +++ b/drivers/pinctrl/pinctrl-rockchip.c > @@ -1208,6 +1208,18 @@ 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); > + int pin; > + u32 data; > + > + pin = offset - chip->base; > + data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); > + > + return !!(data & BIT(pin)); > +} > + > /* > * The calls to gpio_direction_output() and gpio_direction_input() > * leads to this function call (via the pinctrl_gpio_direction_{input|output}() > @@ -1741,6 +1753,7 @@ 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,
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index bf032b9..f22a186 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -1208,6 +1208,18 @@ 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); + int pin; + u32 data; + + pin = offset - chip->base; + data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); + + return !!(data & BIT(pin)); +} + /* * The calls to gpio_direction_output() and gpio_direction_input() * leads to this function call (via the pinctrl_gpio_direction_{input|output}() @@ -1741,6 +1753,7 @@ 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,
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. Change-Id: I237c2e85ac7680b3d0de15bbbb923985b4827def Reported-by: Jeffy Chen <jeffy.chen@rock-chips.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Heiko Stuebner <heiko@sntech.de> Cc: linux-gpio@vger.kernel.org Cc: linux-rockchip@lists.infradead.org --- drivers/pinctrl/pinctrl-rockchip.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)