linux-kernel - [PATCH v2 9/9] arm64: dts: msm8996: Add proper capacity scaling for the cpus

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Message-Id: <5224535a7ef5b257e3baa698991bf6deeefccc36.1558430617.git.amit.kucheria@linaro.org>
Date:   Tue, 21 May 2019 15:05:19 +0530
From:   Amit Kucheria <amit.kucheria@...aro.org>
To:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        bjorn.andersson@...aro.org, agross@...nel.org,
        niklas.cassel@...aro.org, marc.w.gonzalez@...e.fr,
        sibis@...eaurora.org, daniel.lezcano@...aro.org,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Li Yang <leoyang.li@....com>, Shawn Guo <shawnguo@...nel.org>
Cc:     devicetree@...r.kernel.org
Subject: [PATCH v2 9/9] arm64: dts: msm8996: Add proper capacity scaling for the cpus

msm8996 features 4 cpus - 2 in each cluster. However, all cpus implement
the same microarchitecture and the two clusters only differ in the
maximum frequency attainable by the CPUs.

Add capacity-dmips-mhz property to allow the topology code to determine
the actual capacity by taking into account the highest frequency for
each CPU.

Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
Suggested-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 arch/arm64/boot/dts/qcom/msm8996.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi
index 4f2fb7885f39..e0e8f30ce11a 100644
--- a/arch/arm64/boot/dts/qcom/msm8996.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi
@@ -96,6 +96,7 @@
 			reg = <0x0 0x0>;
 			enable-method = "psci";
 			cpu-idle-states = <&CPU_SLEEP_0>;
+			capacity-dmips-mhz = <1024>;
 			next-level-cache = <&L2_0>;
 			L2_0: l2-cache {
 			      compatible = "cache";
@@ -109,6 +110,7 @@
 			reg = <0x0 0x1>;
 			enable-method = "psci";
 			cpu-idle-states = <&CPU_SLEEP_0>;
+			capacity-dmips-mhz = <1024>;
 			next-level-cache = <&L2_0>;
 		};
 
@@ -118,6 +120,7 @@
 			reg = <0x0 0x100>;
 			enable-method = "psci";
 			cpu-idle-states = <&CPU_SLEEP_0>;
+			capacity-dmips-mhz = <1024>;
 			next-level-cache = <&L2_1>;
 			L2_1: l2-cache {
 			      compatible = "cache";
@@ -131,6 +134,7 @@
 			reg = <0x0 0x101>;
 			enable-method = "psci";
 			cpu-idle-states = <&CPU_SLEEP_0>;
+			capacity-dmips-mhz = <1024>;
 			next-level-cache = <&L2_1>;
 		};
 
-- 
2.17.1