| Message ID | 1364260913-25490-9-git-send-email-achew@nvidia.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Mar 25, 2013 at 06:21:52PM -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@nvidia.com> > Acked-by: Alexandre Courbot <acourbot@nvidia.com> > Acked-by: Stephen Warren <swarren@nvidia.com> > --- > arch/arm/boot/dts/tegra20-medcom-wide.dts | 1 + > arch/arm/boot/dts/tegra20-tamonten.dtsi | 5 +++++ > 2 files changed, 6 insertions(+) > > diff --git a/arch/arm/boot/dts/tegra20-medcom-wide.dts b/arch/arm/boot/dts/tegra20-medcom-wide.dts > index a2d6d65..90d665e 100644 > --- a/arch/arm/boot/dts/tegra20-medcom-wide.dts > +++ b/arch/arm/boot/dts/tegra20-medcom-wide.dts > @@ -32,6 +32,7 @@ > > brightness-levels = <0 4 8 16 32 64 128 255>; > default-brightness-level = <6>; > + power-supply = <&backlight_power_reg>; > }; > > sound { > diff --git a/arch/arm/boot/dts/tegra20-tamonten.dtsi b/arch/arm/boot/dts/tegra20-tamonten.dtsi > index 6e9d91f..2d8e7f2 100644 > --- a/arch/arm/boot/dts/tegra20-tamonten.dtsi > +++ b/arch/arm/boot/dts/tegra20-tamonten.dtsi > @@ -485,5 +485,10 @@ > regulator-max-microvolt = <5000000>; > regulator-always-on; > }; > + > + backlight_power_reg: regulator@1 { > + compatible = "regulator-fixed"; > + regulator-name = "backlight-power"; > + }; This is missing a reg property to mirror the unit address "@1". I've just checked the schematics and there is indeed a physical pin that can be used to enable backlight power on Tamonten. It just happens to not be connected on Medcom-Wide for some reason. The physical pin is Tegra's GPIO PB5 and the schematic calls the supply "lcd_bl_en", so I think a more accurate description of this would be: backlight_power_reg: regulator@1 { compatible = "regulator-fixed"; reg = <1>; regulator-name = "lcd_bl_en"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; gpio = <&gpio 13 0>; /* gpio PB5 */ enable-active-high; }; Thierry
diff --git a/arch/arm/boot/dts/tegra20-medcom-wide.dts b/arch/arm/boot/dts/tegra20-medcom-wide.dts index a2d6d65..90d665e 100644 --- a/arch/arm/boot/dts/tegra20-medcom-wide.dts +++ b/arch/arm/boot/dts/tegra20-medcom-wide.dts @@ -32,6 +32,7 @@ brightness-levels = <0 4 8 16 32 64 128 255>; default-brightness-level = <6>; + power-supply = <&backlight_power_reg>; }; sound { diff --git a/arch/arm/boot/dts/tegra20-tamonten.dtsi b/arch/arm/boot/dts/tegra20-tamonten.dtsi index 6e9d91f..2d8e7f2 100644 --- a/arch/arm/boot/dts/tegra20-tamonten.dtsi +++ b/arch/arm/boot/dts/tegra20-tamonten.dtsi @@ -485,5 +485,10 @@ regulator-max-microvolt = <5000000>; regulator-always-on; }; + + backlight_power_reg: regulator@1 { + compatible = "regulator-fixed"; + regulator-name = "backlight-power"; + }; }; };