pwm: pca9685: 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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Uwe Kleine-König <[email protected]>

Author: Bartosz Golaszewski

drivers/pwm/pwm-pca9685.c

@@ -263,12 +263,14 @@ static int pca9685_pwm_gpio_get(struct gpio_chip *gpio, unsigned int offset)
 	return pca9685_pwm_get_duty(chip, offset) != 0;
 }
 
-static void pca9685_pwm_gpio_set(struct gpio_chip *gpio, unsigned int offset,
-				 int value)
+static int pca9685_pwm_gpio_set(struct gpio_chip *gpio, unsigned int offset,
+				int value)
 {
 	struct pwm_chip *chip = gpiochip_get_data(gpio);
 
 	pca9685_pwm_set_duty(chip, offset, value ? PCA9685_COUNTER_RANGE : 0);
+
+	return 0;
 }
 
 static void pca9685_pwm_gpio_free(struct gpio_chip *gpio, unsigned int offset)
@@ -321,7 +323,7 @@ static int pca9685_pwm_gpio_probe(struct pwm_chip *chip)
 	pca->gpio.direction_input = pca9685_pwm_gpio_direction_input;
 	pca->gpio.direction_output = pca9685_pwm_gpio_direction_output;
 	pca->gpio.get = pca9685_pwm_gpio_get;
-	pca->gpio.set = pca9685_pwm_gpio_set;
+	pca->gpio.set_rv = pca9685_pwm_gpio_set;
 	pca->gpio.base = -1;
 	pca->gpio.ngpio = PCA9685_MAXCHAN;
 	pca->gpio.can_sleep = true;