linux-kernel - [PATCH AUTOSEL 4.18 03/92] arm64: dts: uniphier: Add missing cooling device properties for CPUs

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Message-ID: <20180915012944.179481-3-alexander.levin@microsoft.com>
Date:   Sat, 15 Sep 2018 01:29:50 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Viresh Kumar <viresh.kumar@...aro.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 03/92] arm64: dts: uniphier: Add missing cooling
 device properties for CPUs

From: Viresh Kumar <viresh.kumar@...aro.org>

[ Upstream commit af0e09d0c6762e486b0eb5cc4737396964c34fad ]

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>
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 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 0298bd0d0e1a..caf112629caa 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>;
 		};
 	};
 
-- 
2.17.1