arm64: qcom: sc7180: trogdor: Add ADC nodes and thermal zone for charger thermistor

Trogdor has a thermistor to monitor the temperature of the charger IC.
Add the ADC (monitor) nodes and a thermal zone for this thermistor.
Signed-off-by: Antony Wang <antony_wang@compal.corp-partner.google.com>
[mka: tweaked commit message]
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/20201030084840.1.If389f211a8532b83095ff8c66ec181424440f8d6@changeidSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi

@@ -13,6 +13,23 @@
 #include "pm6150.dtsi"
 #include "pm6150l.dtsi"
 
+/ {
+	thermal-zones {
+		charger-thermal {
+			polling-delay-passive = <0>;
+			polling-delay = <0>;
+
+			thermal-sensors = <&pm6150_adc_tm 1>;
+
+			trips {
+				temperature = <125000>;
+				hysteresis = <1000>;
+				type = "critical";
+			};
+		};
+	};
+};
+
 /*
  * Reserved memory changes
  *
@@ -741,6 +758,25 @@ &mdss {
 	status = "okay";
 };
 
+&pm6150_adc {
+	charger-thermistor@4f {
+		reg = <ADC5_AMUX_THM3_100K_PU>;
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+	};
+};
+
+&pm6150_adc_tm {
+	status = "okay";
+
+	charger-thermistor@1 {
+		reg = <1>;
+		io-channels = <&pm6150_adc ADC5_AMUX_THM3_100K_PU>;
+		qcom,ratiometric;
+		qcom,hw-settle-time-us = <200>;
+	};
+};
+
 &pm6150_pwrkey {
 	status = "disabled";
 };