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Date: Thu, 23 Feb 2023 15:54:23 +0100
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: matthias.bgg@...il.com
Cc: robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
Subject: [PATCH v1 1/4] arm64: dts: mediatek: cherry: Add platform thermal configuration
This platform has three auxiliary NTC thermistors, connected to the
SoC's ADC pins. Enable the auxadc in order to be able to read the
ADC values, add a generic-adc-thermal LUT for each and finally assign
them to the SoC's thermal zones.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
.../boot/dts/mediatek/mt8195-cherry.dtsi | 124 ++++++++++++++++++
1 file changed, 124 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index 24669093fbed..ae2052a7160d 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -104,6 +104,108 @@ ppvar_sys: regulator-ppvar-sys {
regulator-boot-on;
};
+ tboard_thermistor1: thermal-sensor-t1 {
+ compatible = "generic-adc-thermal";
+ #thermal-sensor-cells = <0>;
+ io-channels = <&auxadc 0>;
+ io-channel-names = "sensor-channel";
+ temperature-lookup-table = < (-5000) 4241
+ 0 4063
+ 5000 3856
+ 10000 3621
+ 15000 3364
+ 20000 3091
+ 25000 2810
+ 30000 2526
+ 35000 2247
+ 40000 1982
+ 45000 1734
+ 50000 1507
+ 55000 1305
+ 60000 1122
+ 65000 964
+ 70000 827
+ 75000 710
+ 80000 606
+ 85000 519
+ 90000 445
+ 95000 382
+ 100000 330
+ 105000 284
+ 110000 245
+ 115000 213
+ 120000 183
+ 125000 161>;
+ };
+
+ tboard_thermistor2: thermal-sensor-t2 {
+ compatible = "generic-adc-thermal";
+ #thermal-sensor-cells = <0>;
+ io-channels = <&auxadc 0>;
+ io-channel-names = "sensor-channel";
+ temperature-lookup-table = < (-5000) 4241
+ 0 4063
+ 5000 3856
+ 10000 3621
+ 15000 3364
+ 20000 3091
+ 25000 2810
+ 30000 2526
+ 35000 2247
+ 40000 1982
+ 45000 1734
+ 50000 1507
+ 55000 1305
+ 60000 1122
+ 65000 964
+ 70000 827
+ 75000 710
+ 80000 606
+ 85000 519
+ 90000 445
+ 95000 382
+ 100000 330
+ 105000 284
+ 110000 245
+ 115000 213
+ 120000 183
+ 125000 161>;
+ };
+
+ tboard_thermistor3: thermal-sensor-t3 {
+ compatible = "generic-adc-thermal";
+ #thermal-sensor-cells = <0>;
+ io-channels = <&auxadc 0>;
+ io-channel-names = "sensor-channel";
+ temperature-lookup-table = < (-5000) 4241
+ 0 4063
+ 5000 3856
+ 10000 3621
+ 15000 3364
+ 20000 3091
+ 25000 2810
+ 30000 2526
+ 35000 2247
+ 40000 1982
+ 45000 1734
+ 50000 1507
+ 55000 1305
+ 60000 1122
+ 65000 964
+ 70000 827
+ 75000 710
+ 80000 606
+ 85000 519
+ 90000 445
+ 95000 382
+ 100000 330
+ 105000 284
+ 110000 245
+ 115000 213
+ 120000 183
+ 125000 161>;
+ };
+
usb_vbus: regulator-5v0-usb-vbus {
compatible = "regulator-fixed";
regulator-name = "usb-vbus";
@@ -243,6 +345,10 @@ &gpu {
mali-supply = <&mt6315_7_vbuck1>;
};
+&auxadc {
+ status = "okay";
+};
+
&i2c0 {
status = "okay";
@@ -1074,6 +1180,24 @@ mt6315_7_vbuck1: vbuck1 {
};
};
+&thermal_zones {
+ ap_ntc1 {
+ polling-delay = <1000>;
+ polling-delay-passive = <0>;
+ thermal-sensors = <&tboard_thermistor1>;
+ };
+ ap_ntc2 {
+ polling-delay = <1000>;
+ polling-delay-passive = <0>;
+ thermal-sensors = <&tboard_thermistor2>;
+ };
+ ap_ntc3 {
+ polling-delay = <1000>;
+ polling-delay-passive = <0>;
+ thermal-sensors = <&tboard_thermistor3>;
+ };
+};
+
&u3phy0 {
status = "okay";
};
--
2.39.2
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