[PATCH] pinctrl: oxnas: Add GPIO get_direction
From: Neil Armstrong <hidden>
Date: 2016-05-24 10:03:42
Also in:
linux-gpio, lkml
Subsystem:
pin control subsystem, the rest · Maintainers:
Linus Walleij, Linus Torvalds
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 <redacted> --- drivers/pinctrl/pinctrl-oxnas.c | 11 +++++++++++ 1 file changed, 11 insertions(+) Linus, Sorry, I should have implemented it earlier but I was focused to have a clean driver for upstream ! Thanks, Neil
diff --git a/drivers/pinctrl/pinctrl-oxnas.c b/drivers/pinctrl/pinctrl-oxnas.c
index 5fd113c..2c6abef 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, \
--
1.9.1