Implement gpio_get_direction() callback for MAX77620 GPIO. This is useful for debugfs and the userspace ABI.
Signed-off-by: Laxman Dewangan <[email protected]> --- drivers/gpio/gpio-max77620.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/gpio/gpio-max77620.c b/drivers/gpio/gpio-max77620.c index 35f365c..0bb6d93 100644 --- a/drivers/gpio/gpio-max77620.c +++ b/drivers/gpio/gpio-max77620.c @@ -9,6 +9,7 @@ */ #include <linux/gpio/driver.h> +#include <linux/gpio.h> #include <linux/interrupt.h> #include <linux/mfd/max77620.h> #include <linux/module.h> @@ -152,6 +153,23 @@ static int max77620_gpio_dir_output(struct gpio_chip *gc, unsigned int offset, return ret; } +static int max77620_gpio_get_direction(struct gpio_chip *gc, + unsigned int offset) +{ + struct max77620_gpio *mgpio = gpiochip_get_data(gc); + unsigned int val; + int ret; + + ret = regmap_read(mgpio->rmap, GPIO_REG_ADDR(offset), &val); + if (ret < 0) { + dev_err(mgpio->dev, "GPIO register read failed: %d\n", ret); + return ret; + } + + return (val & MAX77620_CNFG_GPIO_DIR_MASK) ? + GPIOF_DIR_IN : GPIOF_DIR_OUT; +} + static int max77620_gpio_set_debounce(struct gpio_chip *gc, unsigned int offset, unsigned int debounce) @@ -236,6 +254,7 @@ static int max77620_gpio_probe(struct platform_device *pdev) mgpio->gpio_chip.direction_input = max77620_gpio_dir_input; mgpio->gpio_chip.get = max77620_gpio_get; mgpio->gpio_chip.direction_output = max77620_gpio_dir_output; + mgpio->gpio_chip.get_direction = max77620_gpio_get_direction; mgpio->gpio_chip.set_debounce = max77620_gpio_set_debounce; mgpio->gpio_chip.set = max77620_gpio_set; mgpio->gpio_chip.to_irq = max77620_gpio_to_irq; -- 2.1.4
