Implement gpio_get_direction() callback for MAX77620 GPIO.
This is useful for debugfs and the userspace ABI.
Signed-off-by: Laxman Dewangan <ldewan...@nvidia.com>
---
Changes from V1:
Earlier it was part of series to implement get_directiona dn set_single_mode.
Other patches are alreadya pplied and hence making this as single patch.
On this patch:
- remove the inclusion of gpio.h
- Do not use GPIOF flags.
drivers/gpio/gpio-max77620.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/gpio/gpio-max77620.c b/drivers/gpio/gpio-max77620.c
index 8658c32..3f34b52 100644
--- a/drivers/gpio/gpio-max77620.c
+++ b/drivers/gpio/gpio-max77620.c
@@ -152,6 +152,22 @@ 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);
+}
+
static int max77620_gpio_set_debounce(struct gpio_chip *gc,
unsigned int offset,
unsigned int debounce)
@@ -258,6 +274,7 @@ 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.set_single_ended = max77620_gpio_set_single_ended;
--
2.1.4
