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arm64: tegra: Add backlight node on Smaug

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The Google Pixel C has a TI LP8557 backlight controller, so add a
DT node for it.

Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Diogo Ivo 2023-08-07 14:33:04 +01:00 committed by Thierry Reding
parent 6a4908de6a
commit a64bec3155
1 changed files with 31 additions and 0 deletions
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31
arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
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@ -1651,6 +1651,37 @@ nau8825@1a {
status = "okay";
};
backlight: backlight@2c {
compatible = "ti,lp8557";
reg = <0x2c>;
power-supply = <&pplcd_vdd>;
enable-supply = <&pp1800_lcdio>;
bl-name = "lp8557-backlight";
dev-ctrl = /bits/ 8 <0x01>;
init-brt = /bits/ 8 <0x80>;
/* Full scale current, 20mA */
rom-11h {
rom-addr = /bits/ 8 <0x11>;
rom-val = /bits/ 8 <0x05>;
};
/* Frequency = 4.9kHz, magic undocumented val */
rom-12h {
rom-addr = /bits/ 8 <0x12>;
rom-val = /bits/ 8 <0x29>;
};
/* Boost freq = 1MHz, BComp option = 1 */
rom-13h {
rom-addr = /bits/ 8 <0x13>;
rom-val = /bits/ 8 <0x03>;
};
/* 4V OV, 6 output LED string enabled */
rom-14h {
rom-addr = /bits/ 8 <0x14>;
rom-val = /bits/ 8 <0xbf>;
};
};
audio-codec@2d {
compatible = "realtek,rt5677";
reg = <0x2d>;