Messages in this thread | | | From | "Philip, Avinash" <> | Subject | DT support for Low threshold brightness in backlight. | Date | Wed, 18 Jul 2012 14:59:32 +0000 |
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Hi,
In pwm-backlight driver low threshold brightness support in DT is not present. Do you have any plans in such direction?
I am planning to add support for the same but want to avoid duplication of work.
Below scenario describes need for it: On some boards panel backlight is OFF at low end of brightness scale. So with Low threshold brightness we can have linear scale in brightness (Though the actual brightness scale is changes to Low threshold brightness value instead of 0).
Example with Low threshold brightness pwms = <&pwm 0 50000>; brightness-levels = <0 2 4 8 16 32 64 128 255>; default-brightness-level = <6>; brightness_threshold_level = <50>;
It can also be achieved without Low threshold brightness as below
pwms = <&pwm 0 50000>; brightness-levels = <0 51 53 56 62 75 101 152 255>; default-brightness-level = <6>;
But brightness-levels won't be uniformly divided.
So it is good to have low threshold DT support for backlight.
Thanks Avinash Philip
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