leds: leds-mc13783: Use proper "max_brightness" value fo LEDs

Instead of using maximum value of 255 and shift it to appropriate
LED duty cycle, this patch introduce a helper to use proper maximum
value for each LED.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

drivers/leds/leds-mc13783.c

@@ -45,11 +45,21 @@ struct mc13xxx_leds {
 	struct mc13xxx_led		led[0];
 };
 
+static unsigned int mc13xxx_max_brightness(int id)
+{
+	if (id >= MC13783_LED_MD && id <= MC13783_LED_KP)
+		return 0x0f;
+	else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3)
+		return 0x1f;
+
+	return 0x3f;
+}
+
 static void mc13xxx_led_work(struct work_struct *work)
 {
 	struct mc13xxx_led *led = container_of(work, struct mc13xxx_led, work);
 	struct mc13xxx_leds *leds = led->leds;
-	unsigned int reg, mask, value, bank, off, shift;
+	unsigned int reg, bank, off, shift;
 
 	switch (led->id) {
 	case MC13783_LED_MD:
@@ -57,8 +67,6 @@ static void mc13xxx_led_work(struct work_struct *work)
 	case MC13783_LED_KP:
 		reg = 2;
 		shift = 9 + (led->id - MC13783_LED_MD) * 4;
-		mask = 0x0f;
-		value = led->new_brightness >> 4;
 		break;
 	case MC13783_LED_R1:
 	case MC13783_LED_G1:
@@ -73,16 +81,12 @@ static void mc13xxx_led_work(struct work_struct *work)
 		bank = off / 3;
 		reg = 3 + bank;
 		shift = (off - bank * 3) * 5 + 6;
-		value = led->new_brightness >> 3;
-		mask = 0x1f;
 		break;
 	case MC13892_LED_MD:
 	case MC13892_LED_AD:
 	case MC13892_LED_KP:
 		reg = (led->id - MC13892_LED_MD) / 2;
 		shift = 3 + (led->id - MC13892_LED_MD) * 12;
-		mask = 0x3f;
-		value = led->new_brightness >> 2;
 		break;
 	case MC13892_LED_R:
 	case MC13892_LED_G:
@@ -91,22 +95,19 @@ static void mc13xxx_led_work(struct work_struct *work)
 		bank = off / 2;
 		reg = 2 + bank;
 		shift = (off - bank * 2) * 12 + 3;
-		value = led->new_brightness >> 2;
-		mask = 0x3f;
 		break;
 	case MC34708_LED_R:
 	case MC34708_LED_G:
 		reg = 0;
 		shift = 3 + (led->id - MC34708_LED_R) * 12;
-		value = led->new_brightness >> 2;
-		mask = 0x3f;
 		break;
 	default:
 		BUG();
 	}
 
 	mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg,
-			mask << shift, value << shift);
+			mc13xxx_max_brightness(led->id) << shift,
+			led->new_brightness << shift);
 }
 
 static void mc13xxx_led_set(struct led_classdev *led_cdev,
@@ -186,7 +187,7 @@ static int __init mc13xxx_led_probe(struct platform_device *pdev)
 		leds->led[i].cdev.default_trigger = trig;
 		leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME;
 		leds->led[i].cdev.brightness_set = mc13xxx_led_set;
-		leds->led[i].cdev.brightness = LED_OFF;
+		leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id);
 
 		INIT_WORK(&leds->led[i].work, mc13xxx_led_work);