From: Jacek Anaszewski <j.anaszewski@samsung.com>
Date: Wed, 9 Nov 2016 10:43:46 +0000 (+0100)
Subject: leds: ledtrig-heartbeat: Make top brightness adjustable
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fb3d769173d26268d7bf068094a599bb28b2ac63;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

leds: ledtrig-heartbeat: Make top brightness adjustable

LED class heartbeat trigger allowed only for blinking with max_brightness
value. This patch adds more flexibility by exploiting part of LED core
software blink infrastructure.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---

diff --git a/drivers/leds/trigger/ledtrig-heartbeat.c b/drivers/leds/trigger/ledtrig-heartbeat.c
index c9f386213e9e..e6f2f8b9f09a 100644
--- a/drivers/leds/trigger/ledtrig-heartbeat.c
+++ b/drivers/leds/trigger/ledtrig-heartbeat.c
@@ -43,6 +43,9 @@ static void led_heartbeat_function(unsigned long data)
 		return;
 	}
 
+	if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE, &led_cdev->work_flags))
+		led_cdev->blink_brightness = led_cdev->new_blink_brightness;
+
 	/* acts like an actual heart beat -- ie thump-thump-pause... */
 	switch (heartbeat_data->phase) {
 	case 0:
@@ -59,26 +62,26 @@ static void led_heartbeat_function(unsigned long data)
 		delay = msecs_to_jiffies(70);
 		heartbeat_data->phase++;
 		if (!heartbeat_data->invert)
-			brightness = led_cdev->max_brightness;
+			brightness = led_cdev->blink_brightness;
 		break;
 	case 1:
 		delay = heartbeat_data->period / 4 - msecs_to_jiffies(70);
 		heartbeat_data->phase++;
 		if (heartbeat_data->invert)
-			brightness = led_cdev->max_brightness;
+			brightness = led_cdev->blink_brightness;
 		break;
 	case 2:
 		delay = msecs_to_jiffies(70);
 		heartbeat_data->phase++;
 		if (!heartbeat_data->invert)
-			brightness = led_cdev->max_brightness;
+			brightness = led_cdev->blink_brightness;
 		break;
 	default:
 		delay = heartbeat_data->period - heartbeat_data->period / 4 -
 			msecs_to_jiffies(70);
 		heartbeat_data->phase = 0;
 		if (heartbeat_data->invert)
-			brightness = led_cdev->max_brightness;
+			brightness = led_cdev->blink_brightness;
 		break;
 	}
 
@@ -133,7 +136,10 @@ static void heartbeat_trig_activate(struct led_classdev *led_cdev)
 	setup_timer(&heartbeat_data->timer,
 		    led_heartbeat_function, (unsigned long) led_cdev);
 	heartbeat_data->phase = 0;
+	if (!led_cdev->blink_brightness)
+		led_cdev->blink_brightness = led_cdev->max_brightness;
 	led_heartbeat_function(heartbeat_data->timer.data);
+	set_bit(LED_BLINK_SW, &led_cdev->work_flags);
 	led_cdev->activated = true;
 }
 
@@ -145,6 +151,7 @@ static void heartbeat_trig_deactivate(struct led_classdev *led_cdev)
 		del_timer_sync(&heartbeat_data->timer);
 		device_remove_file(led_cdev->dev, &dev_attr_invert);
 		kfree(heartbeat_data);
+		clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
 		led_cdev->activated = false;
 	}
 }