linux-kernel - [PATCH 5/5] arm64: dts: apple: t8015: Add backlight nodes

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Message-Id: <20250220-dwi-dt-v1-5-d742431c7373@gmail.com>
Date: Thu, 20 Feb 2025 23:51:07 +0800
From: Nick Chan <towinchenmi@...il.com>
To: Janne Grunau <j@...nau.net>, Sven Peter <sven@...npeter.dev>, 
 Alyssa Rosenzweig <alyssa@...enzweig.io>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Nick Chan <towinchenmi@...il.com>
Subject: [PATCH 5/5] arm64: dts: apple: t8015: Add backlight nodes

Add DWI backlight controller nodes for Apple A11 SoC, and enable it for:

- iPhone 8
- iPhone 8 Plus

Signed-off-by: Nick Chan <towinchenmi@...il.com>
---
 arch/arm64/boot/dts/apple/t8015-8.dtsi | 4 ++++
 arch/arm64/boot/dts/apple/t8015.dtsi   | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/apple/t8015-8.dtsi b/arch/arm64/boot/dts/apple/t8015-8.dtsi
index b6505b5185bdd728a7416efaa3dd53d1c6a5fab9..0300ee1a2ffb7d2bd0558f6cb6f86514f4b433a4 100644
--- a/arch/arm64/boot/dts/apple/t8015-8.dtsi
+++ b/arch/arm64/boot/dts/apple/t8015-8.dtsi
@@ -11,3 +11,7 @@
 / {
 	chassis-type = "handset";
 };
+
+&dwi_bl {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8015.dtsi b/arch/arm64/boot/dts/apple/t8015.dtsi
index b68647bebd20782ba7a125e670b3264c184b62cd..4d54afcecd50b50ed1fd386ccfc46c373e190e6b 100644
--- a/arch/arm64/boot/dts/apple/t8015.dtsi
+++ b/arch/arm64/boot/dts/apple/t8015.dtsi
@@ -262,6 +262,13 @@ pmgr: power-management@...000000 {
 			reg = <0x2 0x32000000 0 0x8c000>;
 		};
 
+		dwi_bl: backlight@...200080 {
+			compatible = "apple,t8015-dwi-bl", "apple,dwi-bl";
+			reg = <0x2 0x32200080 0x0 0x8>;
+			power-domains = <&ps_dwi>;
+			status = "disabled";
+		};
+
 		pinctrl_ap: pinctrl@...100000 {
 			compatible = "apple,t8015-pinctrl", "apple,pinctrl";
 			reg = <0x2 0x33100000 0x0 0x1000>;

-- 
2.48.1