commit acbf76ee05067c3942852019993f7beb69a0f45f upstream.

dtc complains about the lack of #coolin-cells properties for the
CPU nodes that are referred to as "cooling-device":

arch/arm64/boot/dts/mediatek/mt8173-evb.dtb: Warning (cooling_device_property): Missing property '#cooling-cells' in node /cpus/cpu at 0 or bad phandle (referred from /thermal-zones/cpu_thermal/cooling-maps/map at 0:cooling-device[0])
arch/arm64/boot/dts/mediatek/mt8173-evb.dtb: Warning (cooling_device_property): Missing property '#cooling-cells' in node /cpus/cpu at 100 or bad phandle (referred from /thermal-zones/cpu_thermal/cooling-maps/map at 1:cooling-device[0])

Apparently this property must be '<2>' to match the binding.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Olof Johansson <redacted>
[arnd: backported to 4.15]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm64/boot/dts/mediatek/mt8173.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
index 26396ef53bde..ea407aff1251 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi

@@ -81,6 +81,7 @@
 			reg = <0x000>;
 			enable-method = "psci";
 			cpu-idle-states = <&CPU_SLEEP_0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu1: cpu at 1 {

@@ -97,6 +98,7 @@
 			reg = <0x100>;
 			enable-method = "psci";
 			cpu-idle-states = <&CPU_SLEEP_0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu3: cpu at 101 {

-- 
2.9.0