diff options
| author | Thierry Reding <treding@nvidia.com> | 2021-12-07 15:59:59 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2021-12-15 19:29:53 +0300 |
| commit | c98167bbe865591351df10fd88f759f41006d060 (patch) | |
| tree | 610da5d5fdc8cfbb0beafb9d4e09151264ba1c03 | |
| parent | e1808b09df868135240b6b489b692e105d0b17a7 (diff) | |
| download | linux-c98167bbe865591351df10fd88f759f41006d060.tar.xz | |
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>
| -rw-r--r-- | arch/arm/boot/dts/tegra20-medcom-wide.dts | 3 | ||||
| -rw-r--r-- | arch/arm/boot/dts/tegra20-paz00.dts | 3 |
2 files changed, 6 insertions, 0 deletions
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 { |