From 50aa09ac18fac94a907d26dca21aff5507373fb1 Mon Sep 17 00:00:00 2001
From: Sasha Finkelstein <fnkl.kernel@gmail.com>
Date: Sun, 9 Apr 2023 11:18:46 +0200
Subject: [PATCH] arm64: dts: apple: t8112: Add PWM controller

This patch adds the device tree entries for the PWM controller
present on M2 macbooks that is connected to the keyboard backlight.

Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Signed-off-by: Hector Martin <marcan@marcan.st>
---
 arch/arm64/boot/dts/apple/t8112-j413.dts | 17 +++++++++++++++++
 arch/arm64/boot/dts/apple/t8112-j493.dts | 17 +++++++++++++++++
 arch/arm64/boot/dts/apple/t8112.dtsi     |  9 +++++++++
 3 files changed, 43 insertions(+)

diff --git a/arch/arm64/boot/dts/apple/t8112-j413.dts b/arch/arm64/boot/dts/apple/t8112-j413.dts
index 9e758edeaa82..6f69658623bf 100644
--- a/arch/arm64/boot/dts/apple/t8112-j413.dts
+++ b/arch/arm64/boot/dts/apple/t8112-j413.dts
@@ -11,6 +11,7 @@
 
 #include "t8112.dtsi"
 #include "t8112-jxxx.dtsi"
+#include <dt-bindings/leds/common.h>
 
 / {
 	compatible = "apple,j413", "apple,t8112", "apple,arm-platform";
@@ -20,6 +21,18 @@
 		bluetooth0 = &bluetooth0;
 		wifi0 = &wifi0;
 	};
+
+	led-controller {
+		compatible = "pwm-leds";
+		led-0 {
+			pwms = <&fpwm1 0 40000>;
+			label = "kbd_backlight";
+			function = LED_FUNCTION_KBD_BACKLIGHT;
+			color = <LED_COLOR_ID_WHITE>;
+			max-brightness = <255>;
+			default-state = "keep";
+		};
+	};
 };
 
 /*
@@ -61,3 +74,7 @@
 &i2c4 {
 	status = "okay";
 };
+
+&fpwm1 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8112-j493.dts b/arch/arm64/boot/dts/apple/t8112-j493.dts
index 8552c15be265..0ad908349f55 100644
--- a/arch/arm64/boot/dts/apple/t8112-j493.dts
+++ b/arch/arm64/boot/dts/apple/t8112-j493.dts
@@ -11,6 +11,7 @@
 
 #include "t8112.dtsi"
 #include "t8112-jxxx.dtsi"
+#include <dt-bindings/leds/common.h>
 
 / {
 	compatible = "apple,j493", "apple,t8112", "apple,arm-platform";
@@ -20,6 +21,18 @@
 		bluetooth0 = &bluetooth0;
 		wifi0 = &wifi0;
 	};
+
+	led-controller {
+		compatible = "pwm-leds";
+		led-0 {
+			pwms = <&fpwm1 0 40000>;
+			label = "kbd_backlight";
+			function = LED_FUNCTION_KBD_BACKLIGHT;
+			color = <LED_COLOR_ID_WHITE>;
+			max-brightness = <255>;
+			default-state = "keep";
+		};
+	};
 };
 
 /*
@@ -50,3 +63,7 @@
 &i2c4 {
 	status = "okay";
 };
+
+&fpwm1 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8112.dtsi b/arch/arm64/boot/dts/apple/t8112.dtsi
index 698a436e7dac..1666e6ab250b 100644
--- a/arch/arm64/boot/dts/apple/t8112.dtsi
+++ b/arch/arm64/boot/dts/apple/t8112.dtsi
@@ -458,6 +458,15 @@
 			status = "disabled";
 		};
 
+		fpwm1: pwm@235044000 {
+			compatible = "apple,t8112-fpwm", "apple,s5l-fpwm";
+			reg = <0x2 0x35044000 0x0 0x4000>;
+			power-domains = <&ps_fpwm1>;
+			clocks = <&clkref>;
+			#pwm-cells = <2>;
+			status = "disabled";
+		};
+
 		serial0: serial@235200000 {
 			compatible = "apple,s5l-uart";
 			reg = <0x2 0x35200000 0x0 0x1000>;