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[v3,4/5] arm64: dts: smaug: Add backlight node

Message ID 20230807133307.27456-5-diogo.ivo@tecnico.ulisboa.pt
State New
Headers show
Series [v3,1/5] dt-bindings: display: Add bindings for JDI LPM102A188A | expand

Commit Message

Diogo Ivo Aug. 7, 2023, 1:33 p.m. UTC 
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>
---
 arch/arm64/boot/dts/nvidia/tegra210-smaug.dts | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
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Patch

diff --git a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
index bfdb0f8531f6..84ccb1495f21 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
@@ -1648,6 +1648,37 @@  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>;