arm64: dts: mt8183-kukui: Add tboard thermal zones

Add tboard thermal zones.
The tboard thermal sensors are a kind of NTC sensors which are located
on PCB board to correlate the temperature of the case (Tskin).

pull-up voltage: 1800 mv
pull-up resistor: 75K

Vsense = pull-up voltage * Rntc / ( pull-up resistor + Rntc )
AuxIn = Vsense * 4096 / 1500

Signed-off-by: Michael Kao <michael.kao@mediatek.com>
Signed-off-by: Ben Tseng <ben.tseng@mediatek.com>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Link: https://lore.kernel.org/r/20210604093755.13288-1-ben.tseng@mediatek.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index 1512605..ebcab91 100644 (file)
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -851,6 +851,20 @@
        status = "okay";
 };
 
+&thermal_zones {
+       tboard1 {
+               polling-delay = <1000>; /* milliseconds */
+               polling-delay-passive = <0>; /* milliseconds */
+               thermal-sensors = <&tboard_thermistor1>;
+       };
+
+       tboard2 {
+               polling-delay = <1000>; /* milliseconds */
+               polling-delay-passive = <0>; /* milliseconds */
+               thermal-sensors = <&tboard_thermistor2>;
+       };
+};
+
 &u3phy {
        status = "okay";
 };

diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
index e074c0d..833955d 100644 (file)
--- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
@@ -673,7 +673,7 @@
                        nvmem-cell-names = "calibration-data";
                };
 
-               thermal-zones {
+               thermal_zones: thermal-zones {
                        cpu_thermal: cpu_thermal {
                                polling-delay-passive = <100>;
                                polling-delay = <500>;