linux-kernel - [PATCH 5/9] arm64: dts: apple: s8001: Add cpufreq nodes

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Message-ID: <20241222175314.151437-6-towinchenmi@gmail.com>
Date: Mon, 23 Dec 2024 01:52:05 +0800
From: Nick Chan <towinchenmi@...il.com>
To: Hector Martin <marcan@...can.st>,
	Sven Peter <sven@...npeter.dev>,
	Alyssa Rosenzweig <alyssa@...enzweig.io>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	asahi@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Nick Chan <towinchenmi@...il.com>
Subject: [PATCH 5/9] arm64: dts: apple: s8001: Add cpufreq nodes

Add cpufreq nodes for Apple A9X SoC.

Signed-off-by: Nick Chan <towinchenmi@...il.com>
---
 arch/arm64/boot/dts/apple/s8001.dtsi | 59 ++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

diff --git a/arch/arm64/boot/dts/apple/s8001.dtsi b/arch/arm64/boot/dts/apple/s8001.dtsi
index 23ee3238844d..7f7cb8afd3d3 100644
--- a/arch/arm64/boot/dts/apple/s8001.dtsi
+++ b/arch/arm64/boot/dts/apple/s8001.dtsi
@@ -32,6 +32,8 @@ cpu0: cpu@0 {
 			compatible = "apple,twister";
 			reg = <0x0 0x0>;
 			cpu-release-addr = <0 0>; /* To be filled in by loader */
+			operating-points-v2 = <&twister_opp>;
+			performance-domains = <&cpufreq>;
 			enable-method = "spin-table";
 			device_type = "cpu";
 		};
@@ -40,11 +42,62 @@ cpu1: cpu@1 {
 			compatible = "apple,twister";
 			reg = <0x0 0x1>;
 			cpu-release-addr = <0 0>; /* To be filled in by loader */
+			operating-points-v2 = <&twister_opp>;
+			performance-domains = <&cpufreq>;
 			enable-method = "spin-table";
 			device_type = "cpu";
 		};
 	};
 
+	twister_opp: opp-table {
+		compatible = "operating-points-v2";
+
+		opp01 {
+			opp-hz = /bits/ 64 <300000000>;
+			opp-level = <1>;
+			clock-latency-ns = <800>;
+		};
+		opp02 {
+			opp-hz = /bits/ 64 <396000000>;
+			opp-level = <2>;
+			clock-latency-ns = <53000>;
+		};
+		opp03 {
+			opp-hz = /bits/ 64 <792000000>;
+			opp-level = <3>;
+			clock-latency-ns = <18000>;
+		};
+		opp04 {
+			opp-hz = /bits/ 64 <1080000000>;
+			opp-level = <4>;
+			clock-latency-ns = <21000>;
+		};
+		opp05 {
+			opp-hz = /bits/ 64 <1440000000>;
+			opp-level = <5>;
+			clock-latency-ns = <25000>;
+		};
+		opp06 {
+			opp-hz = /bits/ 64 <1800000000>;
+			opp-level = <6>;
+			clock-latency-ns = <33000>;
+		};
+		opp07 {
+			opp-hz = /bits/ 64 <2160000000>;
+			opp-level = <7>;
+			clock-latency-ns = <45000>;
+		};
+#if 0
+		/* Not available until CPU deep sleep is implemented */
+		opp08 {
+			opp-hz = /bits/ 64 <2160000000>;
+			opp-level = <8>;
+			clock-latency-ns = <45000>;
+			turbo-mode;
+		};
+#endif
+	};
+
 	soc {
 		compatible = "simple-bus";
 		#address-cells = <2>;
@@ -52,6 +105,12 @@ soc {
 		nonposted-mmio;
 		ranges;
 
+		cpufreq: performance-controller@...220000 {
+			compatible = "apple,s8000-cluster-cpufreq", "apple,t8103-cluster-cpufreq", "apple,cluster-cpufreq";
+			reg = <0x2 0x02220000 0 0x1000>;
+			#performance-domain-cells = <0>;
+		};
+
 		serial0: serial@...0c0000 {
 			compatible = "apple,s5l-uart";
 			reg = <0x2 0x0a0c0000 0x0 0x4000>;
-- 
2.47.1