[PATCH 2/4] gpio: rockchip: Add request() ops

[Jonas Karlman]

Some boards use pinctrl to set a non-gpio pinmux on a pin that is later
requested to be used for gpio output.

Add a request() ops that call pinctrl_gpio_request() when the required
gpio-ranges prop has been defined to signal pinctrl driver to use gpio
pinmux.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
PX30, RK3066, RK3188, RK356x and RK3588 are the only SoCs affected,
gpio-ranges props for remaining RK SoCs will be added in a follow up
series adding support for the pinmux status cmd.
---
 drivers/gpio/rk_gpio.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpio/rk_gpio.c b/drivers/gpio/rk_gpio.c
index 2e901ac5c734..956894501633 100644
--- a/drivers/gpio/rk_gpio.c
+++ b/drivers/gpio/rk_gpio.c
@@ -126,6 +126,15 @@ static int rockchip_gpio_get_function(struct udevice *dev, unsigned offset)
 	return (data & mask) ? GPIOF_OUTPUT : GPIOF_INPUT;
 }
 
+static int rockchip_gpio_request(struct udevice *dev, unsigned offset,
+				 const char *label)
+{
+	if (CONFIG_IS_ENABLED(PINCTRL) && dev_read_bool(dev, "gpio-ranges"))
+		return pinctrl_gpio_request(dev, offset, label);
+
+	return 0;
+}
+
 /* Simple SPL interface to GPIOs */
 #ifdef CONFIG_SPL_BUILD
 
@@ -216,6 +225,7 @@ static int rockchip_gpio_probe(struct udevice *dev)
 }
 
 static const struct dm_gpio_ops gpio_rockchip_ops = {
+	.request		= rockchip_gpio_request,
 	.direction_input	= rockchip_gpio_direction_input,
 	.direction_output	= rockchip_gpio_direction_output,
 	.get_value		= rockchip_gpio_get_value,
-- 
2.43.2