gpio: ich: Implement get_direction function

Allow the kernel to query the driver for a GPIO's pin direction.

Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index 7818cd1453ae88cd7d806a1664479836b20fb9e4..4ba7ed502131ad1565aa76ac863a07cd53c151b1 100644 (file)
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -173,6 +173,11 @@ static bool ichx_gpio_check_available(struct gpio_chip *gpio, unsigned nr)
        return !!(ichx_priv.use_gpio & (1 << (nr / 32)));
 }
 
+static int ichx_gpio_get_direction(struct gpio_chip *gpio, unsigned nr)
+{
+       return ichx_read_bit(GPIO_IO_SEL, nr) ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
+}
+
 static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
 {
        /*
@@ -286,6 +291,7 @@ static void ichx_gpiolib_setup(struct gpio_chip *chip)
                ichx_priv.desc->get : ichx_gpio_get;
 
        chip->set = ichx_gpio_set;
+       chip->get_direction = ichx_gpio_get_direction;
        chip->direction_input = ichx_gpio_direction_input;
        chip->direction_output = ichx_gpio_direction_output;
        chip->base = modparam_gpiobase;