linux-kernel - [PATCH v4 12/13] arm64: dts: qcom: qcs404: Add DVFS support

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Date:   Wed, 31 Jul 2019 22:29:28 +0200
From:   Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
To:     jorge.ramirez-ortiz@...aro.org, bjorn.andersson@...aro.org,
        sboyd@...nel.org, david.brown@...aro.org, jassisinghbrar@...il.com,
        mark.rutland@....com, mturquette@...libre.com, robh+dt@...nel.org,
        will.deacon@....com, arnd@...db.de, horms+renesas@...ge.net.au,
        heiko@...ech.de, sibis@...eaurora.org,
        enric.balletbo@...labora.com, jagan@...rulasolutions.com,
        olof@...om.net
Cc:     vkoul@...nel.org, niklas.cassel@...aro.org,
        georgi.djakov@...aro.org, amit.kucheria@...aro.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, khasim.mohammed@...aro.org
Subject: [PATCH v4 12/13] arm64: dts: qcom: qcs404: Add DVFS support

Support dynamic voltage and frequency scaling on qcs404.

CPUFreq will soon be superseeded by Core Power Reduction (CPR, a form
of Adaptive Voltage Scaling found on some Qualcomm SoCs like the
qcs404). 

Due to the CPR upstreaming already being in progress - and some
commits already merged -  the following commit will need to be
reverted to enable CPUFreq support 

   Author: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
   Date:   Thu Jul 25 12:41:36 2019 +0200
       cpufreq: Add qcs404 to cpufreq-dt-platdev blacklist

Co-developed-by: Niklas Cassel <niklas.cassel@...aro.org>
Signed-off-by: Niklas Cassel <niklas.cassel@...aro.org>
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 arch/arm64/boot/dts/qcom/qcs404.dtsi | 31 ++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs404.dtsi b/arch/arm64/boot/dts/qcom/qcs404.dtsi
index 5b7d6258e9bf..8cce4a224de2 100644
--- a/arch/arm64/boot/dts/qcom/qcs404.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs404.dtsi
@@ -36,6 +36,10 @@
 			cpu-idle-states = <&CPU_SLEEP_0>;
 			next-level-cache = <&L2_0>;
 			#cooling-cells = <2>;
+			clocks = <&apcs_glb>;
+			operating-points-v2 = <&cpu_opp_table>;
+			cpu-supply = <&pms405_s3>;
+
 		};
 
 		CPU1: cpu@101 {
@@ -46,6 +50,9 @@
 			cpu-idle-states = <&CPU_SLEEP_0>;
 			next-level-cache = <&L2_0>;
 			#cooling-cells = <2>;
+			clocks = <&apcs_glb>;
+			operating-points-v2 = <&cpu_opp_table>;
+			cpu-supply = <&pms405_s3>;
 		};
 
 		CPU2: cpu@102 {
@@ -56,6 +63,9 @@
 			cpu-idle-states = <&CPU_SLEEP_0>;
 			next-level-cache = <&L2_0>;
 			#cooling-cells = <2>;
+			clocks = <&apcs_glb>;
+			operating-points-v2 = <&cpu_opp_table>;
+			cpu-supply = <&pms405_s3>;
 		};
 
 		CPU3: cpu@103 {
@@ -66,6 +76,9 @@
 			cpu-idle-states = <&CPU_SLEEP_0>;
 			next-level-cache = <&L2_0>;
 			#cooling-cells = <2>;
+			clocks = <&apcs_glb>;
+			operating-points-v2 = <&cpu_opp_table>;
+			cpu-supply = <&pms405_s3>;
 		};
 
 		L2_0: l2-cache {
@@ -88,6 +101,24 @@
 		};
 	};
 
+	cpu_opp_table: cpu-opp-table {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-1094400000 {
+			opp-hz = /bits/ 64 <1094400000>;
+			opp-microvolt = <1224000 1224000 1224000>;
+		};
+		opp-1248000000 {
+			opp-hz = /bits/ 64 <1248000000>;
+			opp-microvolt = <1288000 1288000 1288000>;
+		};
+		opp-1401600000 {
+			opp-hz = /bits/ 64 <1401600000>;
+			opp-microvolt = <1384000 1384000 1384000>;
+		};
+	};
+
 	firmware {
 		scm: scm {
 			compatible = "qcom,scm-qcs404", "qcom,scm";
-- 
2.22.0