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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2014-05-19 22:42:42 +0200
committerThierry Reding <thierry.reding@gmail.com>2014-05-21 11:19:45 +0200
commit16fc3352ea58b481f879f8d965b98208ccc279c2 (patch)
tree59c61a8dfd8b83b2f0cdc7831633ec2db0f285d6 /drivers
parent81225bed32739752df61b5821bbf3f9be70e434d (diff)
downloadlinux-stericsson-16fc3352ea58b481f879f8d965b98208ccc279c2.tar.gz
pwm-backlight: retrieve configured PWM period
The PWM core is now able to initialize the PWM period from a lookup table defined by board files. Use it if available and fallback to the value supplied in pwm_period_ns. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/video/backlight/pwm_bl.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index cc49347bbcc0..38ca88bc5c3e 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -296,12 +296,15 @@ static int pwm_backlight_probe(struct platform_device *pdev)
/*
* The DT case will set the pwm_period_ns field to 0 and store the
* period, parsed from the DT, in the PWM device. For the non-DT case,
- * set the period from platform data.
+ * set the period from platform data if it has not already been set
+ * via the PWM lookup table.
*/
- if (data->pwm_period_ns > 0)
+ pb->period = pwm_get_period(pb->pwm);
+ if (!pb->period && (data->pwm_period_ns > 0)) {
+ pb->period = data->pwm_period_ns;
pwm_set_period(pb->pwm, data->pwm_period_ns);
+ }
- pb->period = pwm_get_period(pb->pwm);
pb->lth_brightness = data->lth_brightness * (pb->period / pb->scale);
memset(&props, 0, sizeof(struct backlight_properties));