gpio: wcove-gpio: add get_direction method

This patch adds .get_direction method for the gpio_chip structure
of the wcove_gpio driver.

Signed-off-by: Bin Gao <bin.gao@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-wcove.c b/drivers/gpio/gpio-wcove.c
index f5c88df96eaa..e11d6a3fb641 100644
--- a/drivers/gpio/gpio-wcove.c
+++ b/drivers/gpio/gpio-wcove.c
@@ -164,6 +164,19 @@ static int wcove_gpio_dir_out(struct gpio_chip *chip, unsigned int gpio,
                             CTLO_OUTPUT_SET | value);
 }
 
+static int wcove_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio)
+{
+        struct wcove_gpio *wg = gpiochip_get_data(chip);
+        unsigned int val;
+        int ret;
+
+        ret = regmap_read(wg->regmap, to_reg(gpio, CTRL_OUT), &val);
+        if (ret)
+                return ret;
+
+        return !(val & CTLO_DIR_OUT);
+}
+
 static int wcove_gpio_get(struct gpio_chip *chip, unsigned int gpio)
 {
         struct wcove_gpio *wg = gpiochip_get_data(chip);
@@ -394,6 +407,7 @@ static int wcove_gpio_probe(struct platform_device *pdev)
         wg->chip.label = KBUILD_MODNAME;
         wg->chip.direction_input = wcove_gpio_dir_in;
         wg->chip.direction_output = wcove_gpio_dir_out;
+        wg->chip.get_direction = wcove_gpio_get_direction;
         wg->chip.get = wcove_gpio_get;
         wg->chip.set = wcove_gpio_set;
         wg->chip.set_single_ended = wcove_gpio_set_single_ended,