* [PATCH v2] leds: ledtrig-heartbeat: Make top brightness adjustable
@ 2016-11-09 10:43 Jacek Anaszewski
2016-11-09 11:21 ` Pavel Machek
2016-11-09 11:51 ` Hans de Goede
0 siblings, 2 replies; 4+ messages in thread
From: Jacek Anaszewski @ 2016-11-09 10:43 UTC (permalink / raw)
To: linux-leds; +Cc: linux-kernel, Jacek Anaszewski, Pavel Machek, Hans de Goede
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>
Cc: Hans de Goede <hdegoede@redhat.com>
---
Changes since v1:
- after introduction of work_flags and new_blink_brightness properties
this patch needs to be updated
drivers/leds/trigger/ledtrig-heartbeat.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/leds/trigger/ledtrig-heartbeat.c b/drivers/leds/trigger/ledtrig-heartbeat.c
index c9f3862..e6f2f8b 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;
}
}
--
1.9.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v2] leds: ledtrig-heartbeat: Make top brightness adjustable
2016-11-09 10:43 [PATCH v2] leds: ledtrig-heartbeat: Make top brightness adjustable Jacek Anaszewski
@ 2016-11-09 11:21 ` Pavel Machek
2016-11-09 11:50 ` Jacek Anaszewski
2016-11-09 11:51 ` Hans de Goede
1 sibling, 1 reply; 4+ messages in thread
From: Pavel Machek @ 2016-11-09 11:21 UTC (permalink / raw)
To: Jacek Anaszewski; +Cc: linux-leds, linux-kernel, Hans de Goede
[-- Attachment #1: Type: text/plain, Size: 486 bytes --]
On Wed 2016-11-09 11:43:46, Jacek Anaszewski wrote:
> 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>
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 181 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] leds: ledtrig-heartbeat: Make top brightness adjustable
2016-11-09 11:21 ` Pavel Machek
@ 2016-11-09 11:50 ` Jacek Anaszewski
0 siblings, 0 replies; 4+ messages in thread
From: Jacek Anaszewski @ 2016-11-09 11:50 UTC (permalink / raw)
To: Pavel Machek; +Cc: linux-leds, linux-kernel, Hans de Goede
Hi Pavel,
On 11/09/2016 12:21 PM, Pavel Machek wrote:
> On Wed 2016-11-09 11:43:46, Jacek Anaszewski wrote:
>> 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>
>
Thanks. Reapplied on top of blink_brightness race fixes.
--
Best regards,
Jacek Anaszewski
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] leds: ledtrig-heartbeat: Make top brightness adjustable
2016-11-09 10:43 [PATCH v2] leds: ledtrig-heartbeat: Make top brightness adjustable Jacek Anaszewski
2016-11-09 11:21 ` Pavel Machek
@ 2016-11-09 11:51 ` Hans de Goede
1 sibling, 0 replies; 4+ messages in thread
From: Hans de Goede @ 2016-11-09 11:51 UTC (permalink / raw)
To: Jacek Anaszewski, linux-leds; +Cc: linux-kernel, Pavel Machek
Hi,
On 09-11-16 11:43, Jacek Anaszewski wrote:
> 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>
> Cc: Hans de Goede <hdegoede@redhat.com>
> ---
> Changes since v1:
> - after introduction of work_flags and new_blink_brightness properties
> this patch needs to be updated
Patch looks good to me:
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Regards,
Hans
>
> drivers/leds/trigger/ledtrig-heartbeat.c | 15 +++++++++++----
> 1 file changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/leds/trigger/ledtrig-heartbeat.c b/drivers/leds/trigger/ledtrig-heartbeat.c
> index c9f3862..e6f2f8b 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;
> }
> }
>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2016-11-09 10:43 [PATCH v2] leds: ledtrig-heartbeat: Make top brightness adjustable Jacek Anaszewski
2016-11-09 11:21 ` Pavel Machek
2016-11-09 11:50 ` Jacek Anaszewski
2016-11-09 11:51 ` Hans de Goede
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