From c98167bbe865591351df10fd88f759f41006d060 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Tue, 7 Dec 2021 13:59:59 +0100 Subject: [PATCH] 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 . Signed-off-by: Thierry Reding --- arch/arm/boot/dts/tegra20-medcom-wide.dts | 3 +++ arch/arm/boot/dts/tegra20-paz00.dts | 3 +++ 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 cb6199d7d224..f144487c5da3 100644 --- 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 12c245869a74..5ce6a1ff93de 100644 --- 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 {