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Date: Thu, 20 Apr 2023 11:44:29 +0200
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, kernel@...labora.com,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
Subject: [PATCH 1/5] 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 | 105 ++++++++++++++++++
1 file changed, 105 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index 8ac80a136c37..0820e9ba3829 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -114,6 +114,77 @@ ppvar_sys: regulator-ppvar-sys {
regulator-boot-on;
};
+ /* Murata NCP03WF104F05RL */
+ 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 = < (-10000) 1553
+ (-5000) 1485
+ 0 1406
+ 5000 1317
+ 10000 1219
+ 15000 1115
+ 20000 1007
+ 25000 900
+ 30000 796
+ 35000 697
+ 40000 605
+ 45000 523
+ 50000 449
+ 55000 384
+ 60000 327
+ 65000 279
+ 70000 237
+ 75000 202
+ 80000 172
+ 85000 147
+ 90000 125
+ 95000 107
+ 100000 92
+ 105000 79
+ 110000 68
+ 115000 59
+ 120000 51
+ 125000 44>;
+ };
+
+ tboard_thermistor2: thermal-sensor-t2 {
+ compatible = "generic-adc-thermal";
+ #thermal-sensor-cells = <0>;
+ io-channels = <&auxadc 1>;
+ io-channel-names = "sensor-channel";
+ temperature-lookup-table = < (-10000) 1553
+ (-5000) 1485
+ 0 1406
+ 5000 1317
+ 10000 1219
+ 15000 1115
+ 20000 1007
+ 25000 900
+ 30000 796
+ 35000 697
+ 40000 605
+ 45000 523
+ 50000 449
+ 55000 384
+ 60000 327
+ 65000 279
+ 70000 237
+ 75000 202
+ 80000 172
+ 85000 147
+ 90000 125
+ 95000 107
+ 100000 92
+ 105000 79
+ 110000 68
+ 115000 59
+ 120000 51
+ 125000 44>;
+ };
+
usb_vbus: regulator-5v0-usb-vbus {
compatible = "regulator-fixed";
regulator-name = "usb-vbus";
@@ -260,6 +331,10 @@ &gpu {
mali-supply = <&mt6315_7_vbuck1>;
};
+&auxadc {
+ status = "okay";
+};
+
&i2c0 {
status = "okay";
@@ -1098,6 +1173,36 @@ mt6315_7_vbuck1: vbuck1 {
};
};
+&thermal_zones {
+ soc_area_ntc {
+ polling-delay = <1000>;
+ polling-delay-passive = <250>;
+ thermal-sensors = <&tboard_thermistor1>;
+
+ trips {
+ trip-crit {
+ temperature = <95000>;
+ hysteresis = <2000>;
+ type = "critical";
+ };
+ };
+ };
+
+ pmic_area_ntc {
+ polling-delay = <1000>;
+ polling-delay-passive = <0>;
+ thermal-sensors = <&tboard_thermistor2>;
+
+ trips {
+ trip-crit {
+ temperature = <95000>;
+ hysteresis = <2000>;
+ type = "critical";
+ };
+ };
+ };
+};
+
&u3phy0 {
status = "okay";
};
--
2.40.0
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