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    SubjectDT support for Low threshold brightness in backlight.
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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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