openwrt/target/linux/d1/patches-6.1/0064-riscv-dts-allwinner-d1-Hook-up-PWM-controlled-CPU-vo.patch

From 5479c8efb6ffbbc8b7fd1068337037faf9c20a36 Mon Sep 17 00:00:00 2001
From: Samuel Holland <[email protected]>
Date: Thu, 11 Aug 2022 22:25:40 -0500
Subject: [PATCH 064/117] riscv: dts: allwinner: d1: Hook up PWM-controlled CPU
 voltage regulators

Signed-off-by: Samuel Holland <[email protected]>
---
 .../allwinner/sun20i-d1-clockworkpi-v3.14.dts | 19 +++++++++++--------
 .../sun20i-d1-dongshan-nezha-stu.dts          | 19 +++++++++++--------
 .../boot/dts/allwinner/sun20i-d1-nezha.dts    | 19 +++++++++++--------
 3 files changed, 33 insertions(+), 24 deletions(-)

--- a/arch/riscv/boot/dts/allwinner/sun20i-d1-clockworkpi-v3.14.dts
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1-clockworkpi-v3.14.dts
@@ -48,16 +48,13 @@
 		};
 	};
 
-	/*
-	 * This regulator is PWM-controlled, but the PWM controller is not
-	 * yet supported, so fix the regulator to its default voltage.
-	 */
 	reg_vdd_cpu: vdd-cpu {
-		compatible = "regulator-fixed";
+		compatible = "pwm-regulator";
+		pwms = <&pwm 0 50000 0>;
+		pwm-supply = <&reg_vcc>;
 		regulator-name = "vdd-cpu";
-		regulator-min-microvolt = <1100000>;
-		regulator-max-microvolt = <1100000>;
-		vin-supply = <&reg_vcc>;
+		regulator-min-microvolt = <810000>;
+		regulator-max-microvolt = <1160000>;
 	};
 
 	wifi_pwrseq: wifi-pwrseq {
@@ -254,6 +251,12 @@
 	};
 };
 
+&pwm {
+	pinctrl-0 = <&pwm0_pd16_pin>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-0 = <&uart0_pb8_pins>;
 	pinctrl-names = "default";
--- a/arch/riscv/boot/dts/allwinner/sun20i-d1-dongshan-nezha-stu.dts
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1-dongshan-nezha-stu.dts
@@ -43,16 +43,13 @@
 		vin-supply = <&reg_vcc>;
 	};
 
-	/*
-	 * This regulator is PWM-controlled, but the PWM controller is not
-	 * yet supported, so fix the regulator to its default voltage.
-	 */
 	reg_vdd_cpu: vdd-cpu {
-		compatible = "regulator-fixed";
+		compatible = "pwm-regulator";
+		pwms = <&pwm 0 50000 0>;
+		pwm-supply = <&reg_vcc>;
 		regulator-name = "vdd-cpu";
-		regulator-min-microvolt = <1100000>;
-		regulator-max-microvolt = <1100000>;
-		vin-supply = <&reg_vcc>;
+		regulator-min-microvolt = <810000>;
+		regulator-max-microvolt = <1160000>;
 	};
 };
 
@@ -95,6 +92,12 @@
 	status = "okay";
 };
 
+&pwm {
+	pinctrl-0 = <&pwm0_pd16_pin>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-0 = <&uart0_pb8_pins>;
 	pinctrl-names = "default";
--- a/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
@@ -35,16 +35,13 @@
 		vin-supply = <&reg_vcc>;
 	};
 
-	/*
-	 * This regulator is PWM-controlled, but the PWM controller is not
-	 * yet supported, so fix the regulator to its default voltage.
-	 */
 	reg_vdd_cpu: vdd-cpu {
-		compatible = "regulator-fixed";
+		compatible = "pwm-regulator";
+		pwms = <&pwm 0 50000 0>;
+		pwm-supply = <&reg_vcc>;
 		regulator-name = "vdd-cpu";
-		regulator-min-microvolt = <1100000>;
-		regulator-max-microvolt = <1100000>;
-		vin-supply = <&reg_vcc>;
+		regulator-min-microvolt = <810000>;
+		regulator-max-microvolt = <1160000>;
 	};
 
 	wifi_pwrseq: wifi-pwrseq {
@@ -155,6 +152,12 @@
 	status = "okay";
 };
 
+&pwm {
+	pinctrl-0 = <&pwm0_pd16_pin>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-0 = <&uart0_pb8_pins>;
 	pinctrl-names = "default";