ARM: tegra: Add dummy backlight power supplies

The Medcom Wide and PAZ00 boards don't specify the power supply for the
backlight, which means that the Linux driver will provide a dummy one.
Wire up an explicit dummy to also make the DT schema validation succeed.

Unfortunately I don't have access to the schematics for the Medcom Wide,
so I don't know if a more accurate description is possible.

The AC100 (PAZ00) schematics from here:

	https://www.s-manuals.com/pdf/motherboard/compal/compal_la-6352p_r1.0a_schematics.pdf

aren't entirely clear which one of the supplies powers backlight, but
the panel supply is probably close enough.

Based on work by David Heidelberg <david@ixit.cz>.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/arch/arm/boot/dts/tegra20-medcom-wide.dts b/arch/arm/boot/dts/tegra20-medcom-wide.dts
index cb6199d7d2249cdbfc49f153fed9648d5e2b814b..f144487c5da3c1dd2471768adb8da2ec73d67185 100644 (file)
--- a/arch/arm/boot/dts/tegra20-medcom-wide.dts
+++ b/arch/arm/boot/dts/tegra20-medcom-wide.dts
@@ -54,6 +54,9 @@
 
                brightness-levels = <0 4 8 16 32 64 128 255>;
                default-brightness-level = <6>;
+
+               /* close enough */
+               power-supply = <&vdd_3v3_reg>;
        };
 
        panel: panel {

diff --git a/arch/arm/boot/dts/tegra20-paz00.dts b/arch/arm/boot/dts/tegra20-paz00.dts
index 12c245869a740d9be8d2923ef92f651792447a9d..5ce6a1ff93de1f0380dfe7a59f17496c4514aee2 100644 (file)
--- a/arch/arm/boot/dts/tegra20-paz00.dts
+++ b/arch/arm/boot/dts/tegra20-paz00.dts
@@ -571,6 +571,9 @@
 
                brightness-levels = <0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 255>;
                default-brightness-level = <10>;
+
+               /* close enough */
+               power-supply = <&vdd_pnl_reg>;
        };
 
        clk32k_in: clock-32k {