leds: leds-lp55xx: Generalize turn_off_channels function

Generalize turn_off_channels function as the implementation is the same for
most of the lp55xx based LED driver.

Suggested-by: Lee Jones <lee@kernel.org>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20240626160027.19703-14-ansuelsmth@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>

Author: Ansuel

drivers/leds/leds-lp5523.c

@@ -167,20 +167,12 @@ static void lp5523_stop_engine(struct lp55xx_chip *chip)
 	lp5523_wait_opmode_done();
 }
 
-static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
-{
-	int i;
-
-	for (i = 0; i < LP5523_MAX_LEDS; i++)
-		lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
-}
-
 static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
 {
 	/* stop engine */
 	if (!start) {
 		lp5523_stop_engine(chip);
-		lp5523_turn_off_channels(chip);
+		lp55xx_turn_off_channels(chip);
 		return;
 	}
 

drivers/leds/leds-lp55xx-common.c

@@ -288,6 +288,16 @@ void lp55xx_set_led_current(struct lp55xx_led *led, u8 led_current)
 }
 EXPORT_SYMBOL_GPL(lp55xx_set_led_current);
 
+void lp55xx_turn_off_channels(struct lp55xx_chip *chip)
+{
+	const struct lp55xx_device_config *cfg = chip->cfg;
+	int i;
+
+	for (i = 0; i < cfg->max_channel; i++)
+		lp55xx_write(chip, cfg->reg_led_pwm_base.addr + i, 0);
+}
+EXPORT_SYMBOL_GPL(lp55xx_turn_off_channels);
+
 static void lp55xx_reset_device(struct lp55xx_chip *chip)
 {
 	const struct lp55xx_device_config *cfg = chip->cfg;

drivers/leds/leds-lp55xx-common.h

@@ -220,6 +220,7 @@ extern void lp55xx_firmware_loaded_cb(struct lp55xx_chip *chip);
 extern int lp55xx_led_brightness(struct lp55xx_led *led);
 extern int lp55xx_multicolor_brightness(struct lp55xx_led *led);
 extern void lp55xx_set_led_current(struct lp55xx_led *led, u8 led_current);
+extern void lp55xx_turn_off_channels(struct lp55xx_chip *chip);
 
 /* common probe/remove function */
 extern int lp55xx_probe(struct i2c_client *client);

drivers/leds/leds-lp8501.c

@@ -110,20 +110,12 @@ static int lp8501_post_init_device(struct lp55xx_chip *chip)
 				LP8501_PWR_CONFIG_M, chip->pdata->pwr_sel);
 }
 
-static void lp8501_turn_off_channels(struct lp55xx_chip *chip)
-{
-	int i;
-
-	for (i = 0; i < LP8501_MAX_LEDS; i++)
-		lp55xx_write(chip, LP8501_REG_LED_PWM_BASE + i, 0);
-}
-
 static void lp8501_run_engine(struct lp55xx_chip *chip, bool start)
 {
 	/* stop engine */
 	if (!start) {
 		lp55xx_stop_all_engine(chip);
-		lp8501_turn_off_channels(chip);
+		lp55xx_turn_off_channels(chip);
 		return;
 	}