linux-kernel - [PATCH v4 2/2] ARM: dts: sun8i-r40: add opp table for cpu

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Message-Id: <20220516021516.23216-3-qianfanguijin@163.com>
Date:   Mon, 16 May 2022 10:15:16 +0800
From:   qianfanguijin@....com
To:     linux-sunxi@...ts.linux.dev
Cc:     Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        qianfan Zhao <qianfanguijin@....com>
Subject: [PATCH v4 2/2] ARM: dts: sun8i-r40: add opp table for cpu

From: qianfan Zhao <qianfanguijin@....com>

OPP table value is get from allwinner lichee linux-3.10 kernel driver

Signed-off-by: qianfan Zhao <qianfanguijin@....com>
---
 arch/arm/boot/dts/sun8i-r40.dtsi | 42 ++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-r40.dtsi b/arch/arm/boot/dts/sun8i-r40.dtsi
index 291f4784e86c..8949153eb0eb 100644
--- a/arch/arm/boot/dts/sun8i-r40.dtsi
+++ b/arch/arm/boot/dts/sun8i-r40.dtsi
@@ -54,6 +54,36 @@ / {
 	#size-cells = <1>;
 	interrupt-parent = <&gic>;
 
+	cpu0_opp_table: opp_table0 {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-720000000 {
+			opp-hz = /bits/ 64 <720000000>;
+			opp-microvolt = <1000000 1000000 1300000>;
+			clock-latency-ns = <2000000>;
+		};
+
+		opp-912000000 {
+			opp-hz = /bits/ 64 <912000000>;
+			opp-microvolt = <1100000 1100000 1300000>;
+			clock-latency-ns = <2000000>;
+		};
+
+		opp-1008000000 {
+			opp-hz = /bits/ 64 <1008000000>;
+			opp-microvolt = <1160000 1160000 1300000>;
+			clock-latency-ns = <2000000>;
+		};
+
+		/* The opp table of the cpu frequency that exceeds 1G
+		 * is not defined here. They require higher operating
+		 * current, which may exceed the 500mA limited if the
+		 * system is powered by USB. You can add them to the
+		 * board's DTS is you make sure.
+		 */
+	};
+
 	clocks {
 		#address-cells = <1>;
 		#size-cells = <1>;
@@ -84,24 +114,36 @@ cpu0: cpu@0 {
 			compatible = "arm,cortex-a7";
 			device_type = "cpu";
 			reg = <0>;
+			clocks = <&ccu CLK_CPU>;
+			clock-names = "cpu";
+			operating-points-v2 = <&cpu0_opp_table>;
 		};
 
 		cpu1: cpu@1 {
 			compatible = "arm,cortex-a7";
 			device_type = "cpu";
 			reg = <1>;
+			clocks = <&ccu CLK_CPU>;
+			clock-names = "cpu";
+			operating-points-v2 = <&cpu0_opp_table>;
 		};
 
 		cpu2: cpu@2 {
 			compatible = "arm,cortex-a7";
 			device_type = "cpu";
 			reg = <2>;
+			clocks = <&ccu CLK_CPU>;
+			clock-names = "cpu";
+			operating-points-v2 = <&cpu0_opp_table>;
 		};
 
 		cpu3: cpu@3 {
 			compatible = "arm,cortex-a7";
 			device_type = "cpu";
 			reg = <3>;
+			clocks = <&ccu CLK_CPU>;
+			clock-names = "cpu";
+			operating-points-v2 = <&cpu0_opp_table>;
 		};
 	};
 
-- 
2.25.1