linux-kernel - [PATCH v2 4/5] arm64: dts: qcom: qcs404: Add DVFS support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191125142511.681149-5-niklas.cassel@linaro.org>
Date:   Mon, 25 Nov 2019 15:25:09 +0100
From:   Niklas Cassel <niklas.cassel@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, amit.kucheria@...aro.org,
        Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>,
        Niklas Cassel <niklas.cassel@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/5] arm64: dts: qcom: qcs404: Add DVFS support

From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>

Support dynamic voltage and frequency scaling on qcs404.

CPUFreq will soon be superseded by Core Power Reduction (CPR, a form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>
---
Changes since v1:
-Removed incorrect newline in the middle of the cpu0 DT node.
(This extra newline must have been added by mistake, since no other
cpuX node in the same cluster had this extra newline added.)

 arch/arm64/boot/dts/qcom/qcs404.dtsi | 30 ++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs404.dtsi b/arch/arm64/boot/dts/qcom/qcs404.dtsi
index ee5ecf413664..03aa80f2814a 100644
--- a/arch/arm64/boot/dts/qcom/qcs404.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs404.dtsi
@@ -42,6 +42,9 @@
 			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>;
 		};
 
 		CPU1: cpu@101 {
@@ -52,6 +55,9 @@
 			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 {
@@ -62,6 +68,9 @@
 			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 {
@@ -72,6 +81,9 @@
 			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 {
@@ -94,6 +106,24 @@
 		};
 	};
 
+	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";
-- 
2.23.0