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@jmu.edu.cn>
Reviewed-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20250401120020.976343-3-amadeus@jmu.edu.cn
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
index 6e77f7753ff7841689f930b1777612e98a71edd2..0942baba6b8fe164a2da23b3866327e17567b226 100644 (file)
--- 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 @@
                };
        };
 
+       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 @@
                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>;
 };
 
 &i2c1 {
@@ -146,6 +207,18 @@
        };
 };
 
+&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";