[PATCH] gpio: rcar: Implement .get_direction() callback

[Geert Uytterhoeven <geert+renesas@xxxxxxxxx>]

Allow gpiolib to read back the current I/O direction configuration by
implementing the .get_direction() callback.

Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
 drivers/gpio/gpio-rcar.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index 4d2cc6d32184f390..ec04752b6bd25fb6 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -278,6 +278,13 @@ static void gpio_rcar_free(struct gpio_chip *chip, unsigned offset)
 	pm_runtime_put(&p->pdev->dev);
 }
 
+static int gpio_rcar_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+	struct gpio_rcar_priv *p = gpiochip_get_data(chip);
+
+	return !(gpio_rcar_read(p, INOUTSEL) & BIT(offset));
+}
+
 static int gpio_rcar_direction_input(struct gpio_chip *chip, unsigned offset)
 {
 	gpio_rcar_config_general_input_output_mode(chip, offset, false);
@@ -461,6 +468,7 @@ static int gpio_rcar_probe(struct platform_device *pdev)
 	gpio_chip = &p->gpio_chip;
 	gpio_chip->request = gpio_rcar_request;
 	gpio_chip->free = gpio_rcar_free;
+	gpio_chip->get_direction = gpio_rcar_get_direction;
 	gpio_chip->direction_input = gpio_rcar_direction_input;
 	gpio_chip->get = gpio_rcar_get;
 	gpio_chip->direction_output = gpio_rcar_direction_output;
-- 
2.17.1

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