[PATCH RFC] arm64: dts: qcom: nord: add ADC-TM thermistor channels for Nord PMICs
From: Shawn Guo
Date: Wed Oct 28 2026 - 11:07:19 EST
From: Dhruvin Rajpura <dhruvin.rajpura@xxxxxxxxxxxxxxxx>
PMAU0102 (Kai_MV) and PMM8650AU's Kobra_MM ADC5 Gen3 controllers only
expose REF_GND/1P25VREF/DIE_TEMP calibration channels; none of their
AMUX thermistor pins are wired up, so none of the board thermistor
rails feed the thermal framework.
Only 3 AMUX pins are actually wired to thermistors on Nord, all on
Kai and none on Kobra: Kai instance E's AMUX1 (SDRAM3 THERM) and Kai
instance I's AMUX1/AMUX2 (SDRAM1 THERM, UFS THERM). Kai's other AMUX
pins are either DO_NOT_USE or wired to voltage-rail monitors, not
thermistors, so add only these 3 channels.
Add #thermal-sensor-cells = <1> to the two Kai adc@ nodes that gain
a channel, the new AMUX1[/AMUX2]_THM channel(s) with qcom,adc-tm,
and a per-channel thermal-zone for each, following the existing
Gen3/Gen4 board pattern of a direct thermal-sensors phandle into the
ADC channel.
Signed-off-by: Dhruvin Rajpura <dhruvin.rajpura@xxxxxxxxxxxxxxxx>
Signed-off-by: Shawn Guo <shengchao.guo@xxxxxxxxxxxxxxxx>
---
Dependencies:
- [PATCH v5 0/7] arm64: dts: qcom: nord: Add remoteproc and PMIC support
https://lore.kernel.org/all/20261014063953.549379-1-shengchao.guo@xxxxxxxxxxxxxxxx/
arch/arm64/boot/dts/qcom/pmau0102-nord.dtsi | 80 +++++++++++++++++++++
1 file changed, 80 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/pmau0102-nord.dtsi b/arch/arm64/boot/dts/qcom/pmau0102-nord.dtsi
index 47ea145f4abb..6230fed2374c 100644
--- a/arch/arm64/boot/dts/qcom/pmau0102-nord.dtsi
+++ b/arch/arm64/boot/dts/qcom/pmau0102-nord.dtsi
@@ -31,6 +31,7 @@ pmau0102_e_adc: adc@7200 {
#size-cells = <0>;
interrupts-extended = <&spmi_bus 0x4 0x72 0x1 IRQ_TYPE_EDGE_RISING>;
#io-channel-cells = <1>;
+ #thermal-sensor-cells = <1>;
channel@400 {
reg = <ADC5_GEN3_REF_GND(4)>;
@@ -49,6 +50,14 @@ channel@403 {
label = "pmau0102_e_die_temp";
qcom,pre-scaling = <1 1>;
};
+
+ 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_e_gpios: gpio@8800 {
@@ -243,6 +252,7 @@ pmau0102_i_adc: adc@7200 {
#size-cells = <0>;
interrupts-extended = <&spmi_bus 0x8 0x72 0x1 IRQ_TYPE_EDGE_RISING>;
#io-channel-cells = <1>;
+ #thermal-sensor-cells = <1>;
channel@800 {
reg = <ADC5_GEN3_REF_GND(8)>;
@@ -261,6 +271,22 @@ channel@803 {
label = "pmau0102_i_die_temp";
qcom,pre-scaling = <1 1>;
};
+
+ 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;
+ };
};
pmau0102_i_gpios: gpio@8800 {
@@ -449,6 +475,24 @@ trip0 {
};
};
+ pmau0102_e_sdram3_thermal: pm-e-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";
+ };
+ };
+ };
+
pmau0102_f_thermal: pmau0102-f-thermal {
polling-delay-passive = <100>;
thermal-sensors = <&pmau0102_f_mbg_temp>;
@@ -501,6 +545,42 @@ trip0 {
};
};
+ pmau0102_i_sdram1_thermal: pm-i-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";
+ };
+ };
+ };
+
+ pmau0102_i_ufs_thermal: pm-i-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";
+ };
+ };
+ };
+
pmau0102_j_thermal: pmau0102-j-thermal {
polling-delay-passive = <100>;
thermal-sensors = <&pmau0102_j_mbg_temp>;
--
2.43.0