linux-kernel - [PATCH v3 2/2] arm64: dts: rockchip: Enable regulators for Radxa E20C

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Message-Id: <20250401120020.976343-3-amadeus@jmu.edu.cn>
Date: Tue,  1 Apr 2025 20:00:20 +0800
From: Chukun Pan <amadeus@....edu.cn>
To: Heiko Stuebner <heiko@...ech.de>
Cc: Yao Zi <ziyao@...root.org>,
	Rob Herring <robh@...nel.org>,
	Chukun Pan <amadeus@....edu.cn>,
	Jonas Karlman <jonas@...boo.se>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH v3 2/2] arm64: dts: rockchip: Enable regulators for Radxa E20C

Enable pwm and fixed regulators for Radxa E20C. The pwm regulator is
used to power the CPU and GPU. Note that the LPDDR4 voltage is 1.1V.

Signed-off-by: Chukun Pan <amadeus@....edu.cn>
---
 .../boot/dts/rockchip/rk3528-radxa-e20c.dts   | 73 +++++++++++++++++++
 1 file changed, 73 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
index 57a446b5cbd6..14770bd63ae7 100644
--- a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
@@ -9,6 +9,7 @@
 
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/leds/common.h>
+#include <dt-bindings/pwm/pwm.h>
 #include "rk3528.dtsi"
 
 / {
@@ -80,6 +81,26 @@ led-wan {
 		};
 	};
 
+	vdd_0v9: regulator-0v9-vdd {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_0v9";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <900000>;
+		regulator-max-microvolt = <900000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+
+	vcc_ddr: regulator-1v1-vcc-ddr {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_ddr";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <1100000>;
+		regulator-max-microvolt = <1100000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+
 	vcc_1v8: regulator-1v8-vcc {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc_1v8";
@@ -108,6 +129,46 @@ vcc5v0_sys: regulator-5v0-vcc-sys {
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 	};
+
+	vdd_arm: regulator-vdd-arm {
+		compatible = "pwm-regulator";
+		pwms = <&pwm1 0 5000 PWM_POLARITY_INVERTED>;
+		pwm-supply = <&vcc5v0_sys>;
+		regulator-name = "vdd_arm";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <746000>;
+		regulator-max-microvolt = <1201000>;
+		regulator-settling-time-up-us = <250>;
+	};
+
+	vdd_logic: regulator-vdd-logic {
+		compatible = "pwm-regulator";
+		pwms = <&pwm2 0 5000 PWM_POLARITY_INVERTED>;
+		pwm-supply = <&vcc5v0_sys>;
+		regulator-name = "vdd_logic";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <705000>;
+		regulator-max-microvolt = <1006000>;
+		regulator-settling-time-up-us = <250>;
+	};
+};
+
+&cpu0 {
+	cpu-supply = <&vdd_arm>;
+};
+
+&cpu1 {
+	cpu-supply = <&vdd_arm>;
+};
+
+&cpu2 {
+	cpu-supply = <&vdd_arm>;
+};
+
+&cpu3 {
+	cpu-supply = <&vdd_arm>;
 };
 
 &pinctrl {
@@ -132,6 +193,18 @@ wan_led_g: wan-led-g {
 	};
 };
 
+&pwm1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm1m0_pins>;
+	status = "okay";
+};
+
+&pwm2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm2m0_pins>;
+	status = "okay";
+};
+
 &saradc {
 	vref-supply = <&vcc_1v8>;
 	status = "okay";
-- 
2.25.1