pinctrl: mediatek: moore: use new GPIO line value setter callbacks

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/20250425-gpiochip-set-rv-pinctrl-mediatek-v1-4-93e6a01855e7@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Bartosz Golaszewski

drivers/pinctrl/mediatek/pinctrl-moore.c

@@ -496,24 +496,26 @@ static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
 	return !!value;
 }
 
-static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
+static int mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
 {
 	struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 	const struct mtk_pin_desc *desc;
 
 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
-	if (!desc->name) {
-		dev_err(hw->dev, "Failed to set gpio %d\n", gpio);
-		return;
-	}
+	if (!desc->name)
+		return -ENOTSUPP;
 
-	mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
+	return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
 }
 
 static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
 				     int value)
 {
-	mtk_gpio_set(chip, gpio, value);
+	int ret;
+
+	ret = mtk_gpio_set(chip, gpio, value);
+	if (ret)
+		return ret;
 
 	return pinctrl_gpio_direction_output(chip, gpio);
 }
@@ -567,7 +569,7 @@ static int mtk_build_gpiochip(struct mtk_pinctrl *hw)
 	chip->direction_input	= pinctrl_gpio_direction_input;
 	chip->direction_output	= mtk_gpio_direction_output;
 	chip->get		= mtk_gpio_get;
-	chip->set		= mtk_gpio_set;
+	chip->set_rv		= mtk_gpio_set;
 	chip->to_irq		= mtk_gpio_to_irq;
 	chip->set_config	= mtk_gpio_set_config;
 	chip->base		= -1;