On Tue, 2013-03-19 at 11:59 -0700, Andrew Chew wrote:
> The pwm-backlight driver now takes a mandatory regulator that is gotten
> during driver probe. Initialize a dummy regulator to satisfy this
> requirement.
>
> Signed-off-by: Andrew Chew <achew@xxxxxxxxxx>
> ---
> arch/arm/boot/dts/wm8850-w70v2.dts | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm/boot/dts/wm8850-w70v2.dts b/arch/arm/boot/dts/wm8850-w70v2.dts
> index fcc660c..47a0b1a 100644
> --- a/arch/arm/boot/dts/wm8850-w70v2.dts
> +++ b/arch/arm/boot/dts/wm8850-w70v2.dts
> @@ -37,11 +37,17 @@
> };
> };
>
> + bl_en: fixed-regulator {
> + compatible = "regulator-fixed";
> + regulator-name = "bl-en-supply";
> + };
> +
> backlight {
> compatible = "pwm-backlight";
> pwms = <&pwm 0 50000 1>; /* duty inverted */
>
> brightness-levels = <0 40 60 80 100 130 190 255>;
> default-brightness-level = <5>;
> + enable-supply = <&bl_en>;
> };
> };
This board will use either <&gpio 0 7 0> or <&pinctrl 7 0>, dependant on
the pinctrl driver patchset going through.
If you want it to 'work', feel free to add a regulator for the <&gpio 0
7 0> case - otherwise just leave the dummy and I'll patch it later once
the pinctrl driver is finished.
I only know of one user who is disabling the backlight gpio at present,
and he is doing it with a gpio-led node.
The backlight is enabled by uboot on all boards with an LCD present, so
this is just a power-saving feature for us - nothing breaks by having a
dummy.
Acked-by: Tony Prisk <linux@xxxxxxxxxxxxxxx>
Regards
Tony P
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