linux-kernel - [PATCH AUTOSEL 4.18 046/136] ARM: dts: ls1021a: Add missing cooling device properties for CPUs

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Message-ID: <20180917030006.245495-46-alexander.levin@microsoft.com>
Date:   Mon, 17 Sep 2018 03:00:41 +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>,
        Shawn Guo <shawnguo@...nel.org>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 046/136] ARM: dts: ls1021a: Add missing cooling
 device properties for CPUs

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

[ Upstream commit 47768f372eae030db6fab5225f9504a820d2c07f ]

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: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 arch/arm/boot/dts/ls1021a.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi
index c55d479971cc..f18490548c78 100644
--- a/arch/arm/boot/dts/ls1021a.dtsi
+++ b/arch/arm/boot/dts/ls1021a.dtsi
@@ -84,6 +84,7 @@
 			device_type = "cpu";
 			reg = <0xf01>;
 			clocks = <&clockgen 1 0>;
+			#cooling-cells = <2>;
 		};
 	};
 
-- 
2.17.1