linux-kernel - [PATCH 1/3] ARM: dts: imx6q: Add missing cooling device properties for CPUs

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Message-Id: <1571884465-19720-1-git-send-email-Anson.Huang@nxp.com>
Date:   Thu, 24 Oct 2019 10:34:23 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH 1/3] ARM: dts: imx6q: Add missing cooling device properties for CPUs

The cooling device properties "#cooling-cells" 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: Anson Huang <Anson.Huang@....com>
---
 arch/arm/boot/dts/imx6q.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
index d038f41..9d3be1c 100644
--- a/arch/arm/boot/dts/imx6q.dtsi
+++ b/arch/arm/boot/dts/imx6q.dtsi
@@ -73,6 +73,7 @@
 				396000	1175000
 			>;
 			clock-latency = <61036>; /* two CLK32 periods */
+			#cooling-cells = <2>;
 			clocks = <&clks IMX6QDL_CLK_ARM>,
 				 <&clks IMX6QDL_CLK_PLL2_PFD2_396M>,
 				 <&clks IMX6QDL_CLK_STEP>,
@@ -107,6 +108,7 @@
 				396000	1175000
 			>;
 			clock-latency = <61036>; /* two CLK32 periods */
+			#cooling-cells = <2>;
 			clocks = <&clks IMX6QDL_CLK_ARM>,
 				 <&clks IMX6QDL_CLK_PLL2_PFD2_396M>,
 				 <&clks IMX6QDL_CLK_STEP>,
@@ -141,6 +143,7 @@
 				396000	1175000
 			>;
 			clock-latency = <61036>; /* two CLK32 periods */
+			#cooling-cells = <2>;
 			clocks = <&clks IMX6QDL_CLK_ARM>,
 				 <&clks IMX6QDL_CLK_PLL2_PFD2_396M>,
 				 <&clks IMX6QDL_CLK_STEP>,
-- 
2.7.4