linux-kernel - [PATCH 1/1] arm64: dts: mt8183-kukui: Enable thermal Tboard

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Date:   Fri, 9 Apr 2021 15:11:58 +0800
From:   Michael Kao <michael.kao@...iatek.com>
To:     <michael.kao@...iatek.com>, <fan.chen@...iatek.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        <linux-pm@...r.kernel.org>, <srv_heupstream@...iatek.com>
CC:     Eduardo Valentin <edubezval@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <hsinyi@...omium.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH 1/1] arm64: dts: mt8183-kukui: Enable thermal Tboard

Add Tboard thermal sensor settings.

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

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

TEST=boot kukui
     check /sys/class/thermal/thermal_zone*/type
     check /sys/class/thermal/thermal_zone*/temp

Signed-off-by: Michael Kao <michael.kao@...iatek.com>
Signed-off-by: Nicolas Boichat <drinkcat@...omium.org>
---
 arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 14 ++++++++++++++
 arch/arm64/boot/dts/mediatek/mt8183.dtsi       |  2 +-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index bf2ad1294dd3..202acb542b12 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -801,6 +801,20 @@
 	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 1ad0a1d55d53..f0719dbef249 100644
--- 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>;
-- 
2.18.0