linux-kernel - [PATCH] arm64: dts: allwinner: h6: Enable CPU opp tables for OrangePi One Plus

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Date:   Mon,  2 May 2022 23:01:01 +0800
From:   Chukun Pan <amadeus@....edu.cn>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Chukun Pan <amadeus@....edu.cn>
Subject: [PATCH] arm64: dts: allwinner: h6: Enable CPU opp tables for OrangePi One Plus

Enable CPU opp tables for OrangePi One Plus.

This needs to change the CPU regulator max voltage to fit
the OPP table.

Also add the ramp-delay information to avoid any out of spec
running as the regulator is slower at reaching the voltage
requested compare to the PLL reaching the frequency.

There is no such information for AXP805 but similar PMIC (AXP813)
has a DVM (Dynamic Voltage scaling Management) ramp rate equal
to 2500uV/us.

Signed-off-by: Chukun Pan <amadeus@....edu.cn>
---
 arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
index 92745128fcfe..d7b82ef6be55 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
@@ -5,6 +5,7 @@
 /dts-v1/;
 
 #include "sun50i-h6.dtsi"
+#include "sun50i-h6-cpu-opp.dtsi"
 
 #include <dt-bindings/gpio/gpio.h>
 
@@ -64,6 +65,10 @@ reg_vcc5v: vcc5v {
 	};
 };
 
+&cpu0 {
+	cpu-supply = <&reg_dcdca>;
+};
+
 &de {
 	status = "okay";
 };
@@ -208,7 +213,8 @@ reg_cldo3: cldo3 {
 			reg_dcdca: dcdca {
 				regulator-always-on;
 				regulator-min-microvolt = <810000>;
-				regulator-max-microvolt = <1080000>;
+				regulator-max-microvolt = <1160000>;
+				regulator-ramp-delay = <2500>;
 				regulator-name = "vdd-cpu";
 			};
 
@@ -216,6 +222,7 @@ reg_dcdcc: dcdcc {
 				regulator-enable-ramp-delay = <32000>;
 				regulator-min-microvolt = <810000>;
 				regulator-max-microvolt = <1080000>;
+				regulator-ramp-delay = <2500>;
 				regulator-name = "vdd-gpu";
 			};
 
-- 
2.25.1