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From:   Sasha Finkelstein via B4 Relay 
        <devnull+fnkl.kernel.gmail.com@kernel.org>
Date:   Sun, 09 Apr 2023 11:18:46 +0200
Subject: [PATCH] arm64: dts: apple: t8112: Add PWM controller
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Message-Id: <20230409-t8112-fpwm-v1-1-feffa5f8b99b@gmail.com>
To:     Hector Martin <marcan@marcan.st>, Sven Peter <sven@svenpeter.dev>,
        Alyssa Rosenzweig <alyssa@rosenzweig.io>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc:     asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        Sasha Finkelstein <fnkl.kernel@gmail.com>
Reply-To: <fnkl.kernel@gmail.com>
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From: Sasha Finkelstein <fnkl.kernel@gmail.com>

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>
---
 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 @@ aliases {
 		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 @@ hpm5: usb-pd@3a {
 &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 @@ aliases {
 		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 @@ bluetooth0: bluetooth@0,1 {
 &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 @@ i2c4: i2c@235020000 {
 			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>;

---
base-commit: 8d59efc33fdaa2c82072b4d3ba5f67d7dd9270d0
change-id: 20230409-t8112-fpwm-06e434cc358d

Best regards,
-- 
Sasha Finkelstein <fnkl.kernel@gmail.com>