linux-kernel - [PATCH 6/6] arm64: dts: socionext: Add missing cooling device properties for CPUs

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Message-Id: <744f4c0a9a6f0d3acfc36e49ef62f17f53831b3b.1527225682.git.viresh.kumar@linaro.org>
Date:   Fri, 25 May 2018 11:10:06 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     arm@...nel.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        ionela.voinescu@....com,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        chris.redpath@....com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] arm64: dts: socionext: Add missing cooling device properties for CPUs

The cooling device properties, like "#cooling-cells" and
"dynamic-power-coefficient", should either be present for all the CPUs
of a cluster or none. If these are present only for a subset of CPUs of
a cluster then things will start falling apart as soon as the CPUs are
brought online in a different order. For example, this will happen
because the operating system looks for such properties in the CPU node
it is trying to bring up, so that it can register a cooling device.

Add such missing properties.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi b/arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi
index 3a5ed789c056..10ffb5019013 100644
--- a/arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi
+++ b/arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi
@@ -58,6 +58,7 @@
 			clocks = <&sys_clk 32>;
 			enable-method = "psci";
 			operating-points-v2 = <&cluster0_opp>;
+			#cooling-cells = <2>;
 		};
 
 		cpu2: cpu@100 {
@@ -77,6 +78,7 @@
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
 			operating-points-v2 = <&cluster1_opp>;
+			#cooling-cells = <2>;
 		};
 	};
 
-- 
2.15.0.194.g9af6a3dea062