diff options
| author | Neil Armstrong <narmstrong@baylibre.com> | 2016-05-24 13:03:24 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-05-30 10:41:48 +0300 |
| commit | 2f94ced704c488d0bf6b6efe4969a21089dae72d (patch) | |
| tree | 6d231bb6174a8f099b7d54ad17bbaccddac1e9e1 /drivers/pinctrl/pinctrl-oxnas.c | |
| parent | 2df723d49cdafb6ea97bf7768879c5197666d300 (diff) | |
| download | linux-2f94ced704c488d0bf6b6efe4969a21089dae72d.tar.xz | |
pinctrl: oxnas: Add GPIO get_direction
Implement a get_direction callback for the OXNAS GPIO driver in order
to have pin output polarity in debugfs and new userspace ABI.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-oxnas.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-oxnas.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-oxnas.c b/drivers/pinctrl/pinctrl-oxnas.c index 5fd113c06864..2c6abef91d20 100644 --- a/drivers/pinctrl/pinctrl-oxnas.c +++ b/drivers/pinctrl/pinctrl-oxnas.c @@ -49,6 +49,7 @@ /* GPIO Registers */ #define INPUT_VALUE 0x00 +#define OUTPUT_EN 0x04 #define IRQ_PENDING 0x0c #define OUTPUT_SET 0x14 #define OUTPUT_CLEAR 0x18 @@ -431,6 +432,15 @@ static int oxnas_gpio_request_enable(struct pinctrl_dev *pctldev, return 0; } +static int oxnas_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + struct oxnas_gpio_bank *bank = gpiochip_get_data(chip); + u32 mask = BIT(offset); + + return !(readl_relaxed(bank->reg_base + OUTPUT_EN) & mask); +} + static int oxnas_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) { @@ -664,6 +674,7 @@ static void oxnas_gpio_irq_handler(struct irq_desc *desc) .label = "GPIO" #_bank, \ .request = gpiochip_generic_request, \ .free = gpiochip_generic_free, \ + .get_direction = oxnas_gpio_get_direction, \ .direction_input = oxnas_gpio_direction_input, \ .direction_output = oxnas_gpio_direction_output, \ .get = oxnas_gpio_get, \ |