pinctrl: rockchip: Implement .request() and .free() callbacks

Implement .request() and .free() callbacks on the GPIO chips to
inform pinctrl when a GPIO is requested or freed.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-rockchip.c

@@ -884,6 +884,16 @@ static int rockchip_pinctrl_register(struct platform_device *pdev,
  * GPIO handling
  */
 
+static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+	pinctrl_free_gpio(chip->base + offset);
+}
+
 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
 {
 	struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
@@ -957,6 +967,8 @@ static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
 }
 
 static const struct gpio_chip rockchip_gpiolib_chip = {
+	.request = rockchip_gpio_request,
+	.free = rockchip_gpio_free,
 	.set = rockchip_gpio_set,
 	.get = rockchip_gpio_get,
 	.direction_input = rockchip_gpio_direction_input,