gpio: sch311x: Implement .get_direction()

It's pretty simple to implement the .get_direction() for this
chip, so let's just do it.

Cc: Bruno Randolf <br1@einfach.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-sch311x.c b/drivers/gpio/gpio-sch311x.c
index 8bc2bf4..ed64f7f 100644 (file)
--- a/drivers/gpio/gpio-sch311x.c
+++ b/drivers/gpio/gpio-sch311x.c
@@ -221,6 +221,18 @@ static int sch311x_gpio_direction_out(struct gpio_chip *chip, unsigned offset,
        return 0;
 }
 
+static int sch311x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
+{
+       struct sch311x_gpio_block *block = gpiochip_get_data(chip);
+       unsigned char data;
+
+       spin_lock(&block->lock);
+       data = inb(block->runtime_reg + block->config_regs[offset]);
+       spin_unlock(&block->lock);
+
+       return !!(data & SCH311X_GPIO_CONF_IN);
+}
+
 static int sch311x_gpio_probe(struct platform_device *pdev)
 {
        struct sch311x_pdev_data *pdata = dev_get_platdata(&pdev->dev);
@@ -253,6 +265,7 @@ static int sch311x_gpio_probe(struct platform_device *pdev)
                block->chip.free = sch311x_gpio_free;
                block->chip.direction_input = sch311x_gpio_direction_in;
                block->chip.direction_output = sch311x_gpio_direction_out;
+               block->chip.get_direction = sch311x_gpio_get_direction;
                block->chip.get = sch311x_gpio_get;
                block->chip.set = sch311x_gpio_set;
                block->chip.ngpio = 8;