pinctrl: mediatek: common: 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-v1-5-93e6a01855e7@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Bartosz Golaszewski

drivers/pinctrl/mediatek/pinctrl-mtk-common.c

@@ -86,7 +86,7 @@ static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
 	return 0;
 }
 
-static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static int mtk_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	unsigned int reg_addr;
 	unsigned int bit;
@@ -100,7 +100,7 @@ static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 	else
 		reg_addr = CLR_ADDR(reg_addr, pctl);
 
-	regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
+	return regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
 }
 
 static int mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin,
@@ -809,7 +809,12 @@ static const struct pinmux_ops mtk_pmx_ops = {
 static int mtk_gpio_direction_output(struct gpio_chip *chip,
 					unsigned offset, int value)
 {
-	mtk_gpio_set(chip, offset, value);
+	int ret;
+
+	ret = mtk_gpio_set(chip, offset, value);
+	if (ret)
+		return ret;
+
 	return pinctrl_gpio_direction_output(chip, offset);
 }
 
@@ -893,7 +898,7 @@ static const struct gpio_chip mtk_gpio_chip = {
 	.direction_input	= pinctrl_gpio_direction_input,
 	.direction_output	= mtk_gpio_direction_output,
 	.get			= mtk_gpio_get,
-	.set			= mtk_gpio_set,
+	.set_rv			= mtk_gpio_set,
 	.to_irq			= mtk_gpio_to_irq,
 	.set_config		= mtk_gpio_set_config,
 };