[PATCH 4/4] arm64: dts: rockchip: Describe Alternate Regulator Config on RGB30

[Chris Morgan <macroalpha82@gmail.com>]

From: Chris Morgan <macromorgan@hotmail.com>

Describe a possible secondary regulator configuration for the RGB30.
At some point Powkiddy altered the CPU regulator for the RGB30 without
creating a new model revision. Note this in the device-tree in the
hopes that it may alleviate a user's confusion (or possibly allow a
bootloader to manipulate the tree to swap out the regulators when the
alternate configuration is detected).

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
 .../dts/rockchip/rk3566-powkiddy-rgb30.dts    | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-powkiddy-rgb30.dts b/arch/arm64/boot/dts/rockchip/rk3566-powkiddy-rgb30.dts
index e359465eebe9..484f097e9f11 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-powkiddy-rgb30.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3566-powkiddy-rgb30.dts
@@ -54,6 +54,30 @@ regulator-state-mem {
 			regulator-off-in-suspend;
 		};
 	};
+
+	/*
+	 * Some RGB30 devices use a different CPU regulator. These
+	 * devices have no external markings to denote a different
+	 * model revision.
+	 */
+	vdd_cpu_alt: regulator@40 {
+		compatible = "tcs,tcs4525";
+		reg = <0x40>;
+		fcs,suspend-voltage-selector = <1>;
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <712500>;
+		regulator-max-microvolt = <1390000>;
+		regulator-name = "vdd_cpu_alt";
+		regulator-ramp-delay = <2300>;
+		vin-supply = <&vcc_sys>;
+
+		status = "disabled";
+
+		regulator-state-mem {
+			regulator-off-in-suspend;
+		};
+	};
 };
 
 &sdmmc2 {
-- 
2.34.1


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