linux-kernel - [PATCH 2/5] arm64: dts: apple: t7000: Add backlight nodes

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Message-Id: <20250220-dwi-dt-v1-2-d742431c7373@gmail.com>
Date: Thu, 20 Feb 2025 23:51:04 +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 2/5] arm64: dts: apple: t7000: Add backlight nodes

Add DWI backlight controller nodes for Apple A8 SoC, and enable it for:

- iPhone 6
- iPhone 6 Plus
- iPad mini 4
- iPod touch 6

Signed-off-by: Nick Chan <towinchenmi@...il.com>
---
 arch/arm64/boot/dts/apple/t7000-handheld.dtsi | 4 ++++
 arch/arm64/boot/dts/apple/t7000.dtsi          | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/apple/t7000-handheld.dtsi b/arch/arm64/boot/dts/apple/t7000-handheld.dtsi
index 8984c9ec6cc8e3c86281a3da719edb56c5bb7f5a..7b58aa648b53dadafb3a01d9ae1e01afa6cd5869 100644
--- a/arch/arm64/boot/dts/apple/t7000-handheld.dtsi
+++ b/arch/arm64/boot/dts/apple/t7000-handheld.dtsi
@@ -22,6 +22,10 @@ framebuffer0: framebuffer@0 {
 	};
 };
 
+&dwi_bl {
+	status = "okay";
+};
+
 &serial0 {
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/apple/t7000.dtsi b/arch/arm64/boot/dts/apple/t7000.dtsi
index 32cac8c30e62d657079dbf32aece8af0fd9cef38..98e510b81e26154c258e3359f37a7964484f034f 100644
--- a/arch/arm64/boot/dts/apple/t7000.dtsi
+++ b/arch/arm64/boot/dts/apple/t7000.dtsi
@@ -155,6 +155,13 @@ aic: interrupt-controller@...100000 {
 			power-domains = <&ps_aic>;
 		};
 
+		dwi_bl: backlight@...200010 {
+			compatible = "apple,t7000-dwi-bl", "apple,dwi-bl";
+			reg = <0x2 0xe200010 0x0 0x8>;
+			power-domains = <&ps_dwi>;
+			status = "disabled";
+		};
+
 		pinctrl: pinctrl@...300000 {
 			compatible = "apple,t7000-pinctrl", "apple,pinctrl";
 			reg = <0x2 0x0e300000 0x0 0x100000>;

-- 
2.48.1