pinctrl: baytrail: 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>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Author: Bartosz Golaszewski

drivers/pinctrl/intel/pinctrl-baytrail.c

@@ -1045,15 +1045,15 @@ static int byt_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	return !!(val & BYT_LEVEL);
 }
 
-static void byt_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
+static int byt_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	struct intel_pinctrl *vg = gpiochip_get_data(chip);
 	void __iomem *reg;
 	u32 old_val;
 
 	reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
 	if (!reg)
-		return;
+		return -EINVAL;
 
 	guard(raw_spinlock_irqsave)(&byt_lock);
 
@@ -1062,6 +1062,8 @@ static void byt_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
 		writel(old_val | BYT_LEVEL, reg);
 	else
 		writel(old_val & ~BYT_LEVEL, reg);
+
+	return 0;
 }
 
 static int byt_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
@@ -1229,7 +1231,7 @@ static const struct gpio_chip byt_gpio_chip = {
 	.direction_input	= byt_gpio_direction_input,
 	.direction_output	= byt_gpio_direction_output,
 	.get			= byt_gpio_get,
-	.set			= byt_gpio_set,
+	.set_rv			= byt_gpio_set,
 	.set_config		= gpiochip_generic_config,
 	.dbg_show		= byt_gpio_dbg_show,
 };