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Subject[PATCH 1/2] leds: ledtrig-heartbeat: Make top brightness adjustable
Date
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>
Cc: Pavel Machek <pavel@ucw.cz>
---
drivers/leds/trigger/ledtrig-heartbeat.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/leds/trigger/ledtrig-heartbeat.c b/drivers/leds/trigger/ledtrig-heartbeat.c
index c9f3862..9cc3e97 100644
--- a/drivers/leds/trigger/ledtrig-heartbeat.c
+++ b/drivers/leds/trigger/ledtrig-heartbeat.c
@@ -59,26 +59,26 @@ 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 +133,10 @@ 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);
+ led_cdev->flags |= LED_BLINK_SW;
led_cdev->activated = true;
}

@@ -145,6 +148,7 @@ 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);
+ led_cdev->flags &= ~LED_BLINK_SW;
led_cdev->activated = false;
}
}
--
1.9.1
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