CFA921 and backlight brightness control

[MSDevel]

Hi all,

Im having trouble controlling the backlight brightness properly.

The Linux kernel im using imx28-cfa10058.dts file has this entry. Can you please confirm this is correct?

    backlight {
        compatible = "pwm-backlight";
        pwms = <&pwm 4 5000000>;
        brightness-levels = <0 4 8 16 32 64 128 255>;
        default-brightness-level = <6>;
    };

Im adjusting brightness using: "echo VALUE > /sys/class/backlight/backlight/brightness"
VALUES of 0-5 all appear to be the same brightness, giving the brightest backlight.
VALUES of 6-7 reduce the backlight brightness by a small amount.

How do i fix this to get a wide range of adjustment?

Thanks in advance.

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[CF Support]

Thank you for your patience.

We are looking into the answer to your question and should have some additional information for you soon.

 

[MSDevel]

Great to hear, thankyou.