[PATCH RFC v2 2/2] arm64: dts: qcom: nord-rrd: Add PMIC ADC thermistor channels

[Shawn Guo]

On Nord RRD, three PMAU0102 (Kai_MV) AMUX pins are wired to
thermistors: Kai instance E's AMUX1 (SDRAM3 THERM) and Kai instance I's
AMUX1/AMUX2 (SDRAM1 THERM, UFS THERM). The remaining Kai AMUX pins
monitor voltage rails.

Describe the thermistor channels with qcom,adc-tm and add a thermal
zone for each.

Signed-off-by: Shawn Guo <shengchao.guo@xxxxxxxxxxxxxxxx>
---
 arch/arm64/boot/dts/qcom/nord-rrd.dts | 84 +++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/nord-rrd.dts b/arch/arm64/boot/dts/qcom/nord-rrd.dts
index 47978df0af92..ddea691f1c6f 100644
--- a/arch/arm64/boot/dts/qcom/nord-rrd.dts
+++ b/arch/arm64/boot/dts/qcom/nord-rrd.dts
@@ -53,6 +53,62 @@ bi_tcxo_ao_div2: bi-tcxo-ao-div2-clk {
 			clock-div = <2>;
 		};
 	};
+
+	thermal-zones {
+		sdram3_thermal: sdram3-thermal {
+			thermal-sensors = <&pmau0102_e_adc ADC5_GEN3_AMUX1_THM_100K_PU(4)>;
+
+			trips {
+				trip0 {
+					temperature = <70000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+
+				trip1 {
+					temperature = <90000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+			};
+		};
+
+		sdram1_thermal: sdram1-thermal {
+			thermal-sensors = <&pmau0102_i_adc ADC5_GEN3_AMUX1_THM_100K_PU(8)>;
+
+			trips {
+				trip0 {
+					temperature = <70000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+
+				trip1 {
+					temperature = <90000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+			};
+		};
+
+		ufs_thermal: ufs-thermal {
+			thermal-sensors = <&pmau0102_i_adc ADC5_GEN3_AMUX2_THM_100K_PU(8)>;
+
+			trips {
+				trip0 {
+					temperature = <70000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+
+				trip1 {
+					temperature = <90000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+			};
+		};
+	};
 };
 
 &apps_rsc {
@@ -377,6 +433,34 @@ rtc@32 {
 	};
 };
 
+&pmau0102_e_adc {
+	channel@444 {
+		reg = <ADC5_GEN3_AMUX1_THM_100K_PU(4)>;
+		label = "pmau0102_e_sdram3_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,adc-tm;
+	};
+};
+
+&pmau0102_i_adc {
+	channel@844 {
+		reg = <ADC5_GEN3_AMUX1_THM_100K_PU(8)>;
+		label = "pmau0102_i_sdram1_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,adc-tm;
+	};
+
+	channel@845 {
+		reg = <ADC5_GEN3_AMUX2_THM_100K_PU(8)>;
+		label = "pmau0102_i_ufs_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,adc-tm;
+	};
+};
+
 &qupv3_0 {
 	firmware-name = "qcom/nord/qupv3fw.elf";
 
-- 
2.43.0