[PATCH v4 0/4] arm64: dts: qcom: Add PMIC thermal support for Shikra platforms

[PATCH v4 0/4] arm64: dts: qcom: Add PMIC thermal support for Shikra platforms

[Jishnu Prakash]

This series adds the following:
- VADC and temp-alarm devices for PM4125 and temp-alarm device for PM8005
  which are used for thermal mitigation on Shikra CQ2390M SoM platform
- ADC thermistor channels and thermal configurations for same on Shikra CQ2390M SoM
- ADC thermistor channels and their thermal configurations on Shikra IQ2390S SoM

Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
---
Changes in v4:
- Collected Reviewed-by tags.
- Updated the pm8005-thermal trips to hot and critical.
- Link to v3: https://patch.msgid.link/20260710-shikra_adc_support-v3-0-ddc840fca0a0@oss.qualcomm.com

Changes in v3:
- Dropping the polling-delay = <0> property from all thermal-zones as suggested by Konrad.
- Link to v2: https://patch.msgid.link/20260709-shikra_adc_support-v2-0-8dda38f7bf3d@oss.qualcomm.com

Changes in v2:
- Move thermal zones to their respective PMIC files (PM4125, PM8005) as suggested by Dmitry Baryshkov
- Rename generic-adc-thermal bridge nodes to therm-bridge suffix (msm-therm-bridge, pa-therm-bridge,
  quiet-therm-bridge) as suggested by Dmitry Baryshkov
- Update commit messages accordingly
- Link to v1: https://patch.msgid.link/20260613-shikra_adc_support-v1-0-57d5e6c7f47d@oss.qualcomm.com

To: Bjorn Andersson <andersson@kernel.org>
To: Konrad Dybcio <konradybcio@kernel.org>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

---
Jishnu Prakash (4):
      arm64: dts: qcom: pm4125: Add VADC and temp alarm nodes
      arm64: dts: qcom: pm8005: Add temp alarm node
      arm64: dts: qcom: Add PMIC thermal support for Shikra CQ2390M SoM platform
      arm64: dts: qcom: Add PMIC thermal support for Shikra IQ2390S SoM platform

 arch/arm64/boot/dts/qcom/pm4125.dtsi         | 104 +++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/pm8005.dtsi         |  35 ++++++++
 arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi | 120 +++++++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi | 113 +++++++++++++++++++++++++
 4 files changed, 372 insertions(+)
---
base-commit: cc2b5f627e8ccbae1188ef2d8be3e451d7f933a5
change-id: 20260613-shikra_adc_support-0079650eb76c

Best regards,
--  
Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>

[PATCH v4 1/4] arm64: dts: qcom: pm4125: Add VADC and temp alarm nodes

[Jishnu Prakash]

Add VADC node with some channels under it, for voltage and
temperature readings. Add temperature alarm node, used for
PMIC thermal mitigation.

Co-developed-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
Signed-off-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/pm4125.dtsi | 104 +++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/pm4125.dtsi b/arch/arm64/boot/dts/qcom/pm4125.dtsi
index 3dc8d667d091..77de9db8c119 100644
--- a/arch/arm64/boot/dts/qcom/pm4125.dtsi
+++ b/arch/arm64/boot/dts/qcom/pm4125.dtsi
@@ -8,6 +8,35 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/spmi/spmi.h>
 
+/ {
+	thermal-zones {
+		pm4125-thermal {
+			polling-delay-passive = <100>;
+			thermal-sensors = <&pm4125_tz>;
+
+			trips {
+				pm4125_trip0: trip0 {
+					temperature = <105000>;
+					hysteresis = <0>;
+					type = "passive";
+				};
+
+				pm4125_trip1: trip1 {
+					temperature = <125000>;
+					hysteresis = <0>;
+					type = "hot";
+				};
+
+				pm4125_trip2: trip2 {
+					temperature = <155000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+		};
+	};
+};
+
 &spmi_bus {
 	pmic@0 {
 		compatible = "qcom,pm2250", "qcom,spmi-pmic";
@@ -65,6 +94,81 @@ pm4125_typec: typec@1500 {
 			status = "disabled";
 		};
 
+		pm4125_tz: temp-alarm@2400 {
+			compatible = "qcom,spmi-temp-alarm";
+			reg = <0x2400>;
+			interrupts = <0x0 0x24 0x0 IRQ_TYPE_EDGE_BOTH>;
+			io-channels = <&pm4125_adc ADC5_DIE_TEMP>;
+			io-channel-names = "thermal";
+			#thermal-sensor-cells = <0>;
+		};
+
+		pm4125_adc: adc@3100 {
+			compatible = "qcom,spmi-adc5";
+			reg = <0x3100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			#io-channel-cells = <1>;
+			interrupts = <0x0 0x31 0x0 IRQ_TYPE_EDGE_RISING>;
+
+			/* Channel nodes */
+			channel@0 {
+				reg = <ADC5_REF_GND>;
+				label = "ref_gnd";
+				qcom,pre-scaling = <1 1>;
+			};
+
+			channel@1 {
+				reg = <ADC5_1P25VREF>;
+				label = "vref_1p25";
+				qcom,pre-scaling = <1 1>;
+			};
+
+			channel@6 {
+				reg = <ADC5_DIE_TEMP>;
+				label = "die_temp";
+				qcom,pre-scaling = <1 1>;
+			};
+
+			channel@7 {
+				reg = <ADC5_USB_IN_I>;
+				label = "usb_in_i_uv";
+				qcom,pre-scaling = <1 1>;
+			};
+
+			channel@8 {
+				reg = <ADC5_USB_IN_V_16>;
+				label = "usb_in_v_div_16";
+				qcom,pre-scaling = <1 16>;
+			};
+
+			channel@9 {
+				reg = <ADC5_CHG_TEMP>;
+				label = "chg_temp";
+				qcom,pre-scaling = <1 1>;
+			};
+
+			channel@4b {
+				reg = <ADC5_BAT_ID_100K_PU>;
+				label = "bat_id";
+				qcom,ratiometric;
+				qcom,hw-settle-time = <200>;
+				qcom,pre-scaling = <1 1>;
+			};
+
+			channel@83 {
+				reg = <ADC5_VPH_PWR>;
+				label = "vph_pwr";
+				qcom,pre-scaling = <1 3>;
+			};
+
+			channel@84 {
+				reg = <ADC5_VBAT_SNS>;
+				label = "vbat_sns";
+				qcom,pre-scaling = <1 3>;
+			};
+		};
+
 		rtc@6000 {
 			compatible = "qcom,pm8941-rtc";
 			reg = <0x6000>, <0x6100>;

-- 
2.43.0

[PATCH v4 2/4] arm64: dts: qcom: pm8005: Add temp alarm node

[Jishnu Prakash]

Add temperature alarm node along with thermal zone used
for PMIC thermal mitigation.

Co-developed-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
Signed-off-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/pm8005.dtsi | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/pm8005.dtsi b/arch/arm64/boot/dts/qcom/pm8005.dtsi
index 0f0ab2da8305..ce31a8545020 100644
--- a/arch/arm64/boot/dts/qcom/pm8005.dtsi
+++ b/arch/arm64/boot/dts/qcom/pm8005.dtsi
@@ -4,6 +4,34 @@
 #include <dt-bindings/spmi/spmi.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 
+/ {
+	thermal-zones {
+		pm8005-thermal {
+			thermal-sensors = <&pm8005_tz>;
+
+			trips {
+				pm8005_trip0: trip0 {
+					temperature = <105000>;
+					hysteresis = <0>;
+					type = "passive";
+				};
+
+				pm8005_trip1: trip1 {
+					temperature = <125000>;
+					hysteresis = <0>;
+					type = "hot";
+				};
+
+				pm8005_trip2: trip2 {
+					temperature = <145000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+		};
+	};
+};
+
 &spmi_bus {
 	pm8005_lsid0: pmic@4 {
 		compatible = "qcom,pm8005", "qcom,spmi-pmic";
@@ -11,6 +39,13 @@ pm8005_lsid0: pmic@4 {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
+		pm8005_tz: temp-alarm@2400 {
+			compatible = "qcom,spmi-temp-alarm";
+			reg = <0x2400>;
+			interrupts = <0x4 0x24 0x0 IRQ_TYPE_EDGE_BOTH>;
+			#thermal-sensor-cells = <0>;
+		};
+
 		pm8005_gpios: gpio@c000 {
 			compatible = "qcom,pm8005-gpio", "qcom,spmi-gpio";
 			reg = <0xc000>;

-- 
2.43.0

[PATCH v4 3/4] arm64: dts: qcom: Add PMIC thermal support for Shikra CQ2390M SoM platform

[Jishnu Prakash]

Add ADC channels for pa, quiet and msm thermistors along with
their ADC thermal bridge nodes and thermal zones for PMIC
thermal mitigation.

Co-developed-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
Signed-off-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi | 120 +++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
index dc3861489f64..139d0ad0b1ab 100644
--- a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
+++ b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/iio/qcom,spmi-vadc.h>
 #include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
 
 #include "shikra.dtsi"
@@ -27,9 +28,128 @@ key-volume-up {
 			linux,can-disable;
 		};
 	};
+
+	msm_therm_bridge: msm-therm-bridge {
+		compatible = "generic-adc-thermal";
+		io-channels = <&pm4125_adc ADC5_AMUX_THM3_100K_PU>;
+		io-channel-names = "sensor-channel";
+		#thermal-sensor-cells = <0>;
+	};
+
+	pa_therm_bridge: pa-therm-bridge {
+		compatible = "generic-adc-thermal";
+		io-channels = <&pm4125_adc ADC5_AMUX_THM1_100K_PU>;
+		io-channel-names = "sensor-channel";
+		#thermal-sensor-cells = <0>;
+	};
+
+	quiet_therm_bridge: quiet-therm-bridge {
+		compatible = "generic-adc-thermal";
+		io-channels = <&pm4125_adc ADC5_AMUX_THM2_100K_PU>;
+		io-channel-names = "sensor-channel";
+		#thermal-sensor-cells = <0>;
+	};
+
+	thermal-zones {
+		sys-1-thermal {
+			polling-delay-passive = <2000>;
+			thermal-sensors = <&pa_therm_bridge>;
+
+			trips {
+				active-config0 {
+					temperature = <80000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+			};
+		};
+
+		sys-2-thermal {
+			polling-delay-passive = <2000>;
+			thermal-sensors = <&quiet_therm_bridge>;
+
+			trips {
+				active-config0 {
+					temperature = <80000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+			};
+		};
+
+		sys-3-thermal {
+			polling-delay-passive = <2000>;
+			thermal-sensors = <&msm_therm_bridge>;
+
+			trips {
+				active-config0 {
+					temperature = <80000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+			};
+		};
+	};
+};
+
+&pm4125_adc {
+	pinctrl-0 = <&pm4125_adc_gpio5_default>, <&pm4125_adc_gpio6_default>;
+	pinctrl-names = "default";
+
+	channel@4d {
+		reg = <ADC5_AMUX_THM1_100K_PU>;
+		label = "pa_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
+
+	channel@4e {
+		reg = <ADC5_AMUX_THM2_100K_PU>;
+		label = "quiet_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
+
+	channel@4f {
+		reg = <ADC5_AMUX_THM3_100K_PU>;
+		label = "msm_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
+
+	channel@54 {
+		reg = <ADC5_GPIO3_100K_PU>;
+		label = "chgr_skin";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
+
+	channel@55 {
+		reg = <ADC5_GPIO4_100K_PU>;
+		label = "gnss_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
 };
 
 &pm4125_gpios {
+	pm4125_adc_gpio5_default: pm4125-adc-gpio5-state {
+		pins = "gpio5";
+		function = PMIC_GPIO_FUNC_NORMAL;
+		bias-high-impedance;
+	};
+
+	pm4125_adc_gpio6_default: pm4125-adc-gpio6-state {
+		pins = "gpio6";
+		function = PMIC_GPIO_FUNC_NORMAL;
+		bias-high-impedance;
+	};
+
 	vol_up_n: vol-up-n-state {
 		pins = "gpio9";
 		function = PMIC_GPIO_FUNC_NORMAL;

-- 
2.43.0

[PATCH v4 4/4] arm64: dts: qcom: Add PMIC thermal support for Shikra IQ2390S SoM platform

[Jishnu Prakash]

Add ADC channels for system thermistors, used for thermal mitigation.
Add ADC_TM nodes for pa/quiet/msm thermistors and also thermal zones
for them.

Co-developed-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
Signed-off-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi | 113 +++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi b/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi
index 73945bf42112..9ab0b44b00be 100644
--- a/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi
+++ b/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi
@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/iio/qcom,spmi-vadc.h>
 #include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
 
 #include "shikra.dtsi"
@@ -26,9 +27,121 @@ key-volume-up {
 			linux,can-disable;
 		};
 	};
+
+	thermal-zones {
+		sys-1-thermal {
+			thermal-sensors = <&pm8150_adc_tm 0>;
+
+			trips {
+				active-config0 {
+					temperature = <125000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+			};
+		};
+
+		sys-2-thermal {
+			thermal-sensors = <&pm8150_adc_tm 1>;
+
+			trips {
+				active-config0 {
+					temperature = <125000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+			};
+		};
+
+		sys-3-thermal {
+			thermal-sensors = <&pm8150_adc_tm 2>;
+
+			trips {
+				active-config0 {
+					temperature = <125000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+			};
+		};
+	};
+};
+
+&pm8150_adc {
+	pinctrl-0 = <&pm8150_adc_gpio2_default>, <&pm8150_adc_gpio3_default>;
+	pinctrl-names = "default";
+
+	channel@4d {
+		reg = <ADC5_AMUX_THM1_100K_PU>;
+		label = "msm_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
+
+	channel@4e {
+		reg = <ADC5_AMUX_THM2_100K_PU>;
+		label = "quiet_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
+
+	channel@52 {
+		reg = <ADC5_GPIO1_100K_PU>;
+		label = "gnss_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
+
+	channel@55 {
+		reg = <ADC5_GPIO4_100K_PU>;
+		label = "pa_therm";
+		qcom,ratiometric;
+		qcom,hw-settle-time = <200>;
+		qcom,pre-scaling = <1 1>;
+	};
+};
+
+&pm8150_adc_tm {
+	status = "okay";
+
+	pa-therm@0 {
+		reg = <0>;
+		io-channels = <&pm8150_adc ADC5_GPIO4_100K_PU>;
+		qcom,ratiometric;
+		qcom,hw-settle-time-us = <200>;
+	};
+
+	quiet-therm@1 {
+		reg = <1>;
+		io-channels = <&pm8150_adc ADC5_AMUX_THM2_100K_PU>;
+		qcom,ratiometric;
+		qcom,hw-settle-time-us = <200>;
+	};
+
+	msm-therm@2 {
+		reg = <2>;
+		io-channels = <&pm8150_adc ADC5_AMUX_THM1_100K_PU>;
+		qcom,ratiometric;
+		qcom,hw-settle-time-us = <200>;
+	};
 };
 
 &pm8150_gpios {
+	pm8150_adc_gpio2_default: pm8150-adc-gpio2-state {
+		pins = "gpio2";
+		function = PMIC_GPIO_FUNC_NORMAL;
+		bias-high-impedance;
+	};
+
+	pm8150_adc_gpio3_default: pm8150-adc-gpio3-state {
+		pins = "gpio3";
+		function = PMIC_GPIO_FUNC_NORMAL;
+		bias-high-impedance;
+	};
+
 	vol_up_n: vol-up-n-state {
 		pins = "gpio6";
 		function = PMIC_GPIO_FUNC_NORMAL;

-- 
2.43.0

Re: [PATCH v4 2/4] arm64: dts: qcom: pm8005: Add temp alarm node

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] The critical thermal trip exceeds the hardware maximum limit for a PMIC temp-alarm without an ADC, causing sudden hardware shutdown and boot warnings.
--

--- Patch [2]: [PATCH v4 2/4] arm64: dts: qcom: pm8005: Add temp alarm node ---
commit 6fe65cc601cbda83fdc5adbaeaef49d876e5ddff
Author: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>

arm64: dts: qcom: pm8005: Add temp alarm node

Add temperature alarm node along with thermal zone used
for PMIC thermal mitigation.

> diff --git a/arch/arm64/boot/dts/qcom/pm8005.dtsi b/arch/arm64/boot/dts/qcom/pm8005.dtsi
> index 0f0ab2da83055..ce31a85450200 100644
> --- a/arch/arm64/boot/dts/qcom/pm8005.dtsi
> +++ b/arch/arm64/boot/dts/qcom/pm8005.dtsi
> @@ -4,6 +4,34 @@
>  #include <dt-bindings/spmi/spmi.h>
>  #include <dt-bindings/interrupt-controller/irq.h>
>  
> +/ {
> +	thermal-zones {
> +		pm8005-thermal {
> +			thermal-sensors = <&pm8005_tz>;
> +
> +			trips {

[ ... ]

> +				pm8005_trip2: trip2 {
> +					temperature = <145000>;
> +					hysteresis = <0>;
> +					type = "critical";
> +				};

[Severity: High]
Does this critical trip temperature exceed the hardware maximum limit?

The critical thermal trip is set to 145°C, but the temp alarm node below lacks
an io-channels property to specify an ADC.

Without an ADC, the qcom,spmi-temp-alarm driver will clamp the critical trip to
the hardware maximum (140°C) and leave the hardware auto-shutdown enabled. This
can cause an abrupt power cut at 140°C, bypassing the OS's graceful shutdown
procedure that was intended to happen at 145°C, and will also print a warning
on every boot.

> +			};
> +		};
> +	};
> +};
> +
>  &spmi_bus {
>  	pm8005_lsid0: pmic@4 {
>  		compatible = "qcom,pm8005", "qcom,spmi-pmic";
> @@ -11,6 +39,13 @@ pm8005_lsid0: pmic@4 {
>  		#address-cells = <1>;
>  		#size-cells = <0>;
>  
> +		pm8005_tz: temp-alarm@2400 {
> +			compatible = "qcom,spmi-temp-alarm";
> +			reg = <0x2400>;
> +			interrupts = <0x4 0x24 0x0 IRQ_TYPE_EDGE_BOTH>;
> +			#thermal-sensor-cells = <0>;
> +		};

[ ... ]

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260715-shikra_adc_support-v4-0-5e07b6d21429@oss.qualcomm.com?part=2

Re: [PATCH v4 3/4] arm64: dts: qcom: Add PMIC thermal support for Shikra CQ2390M SoM platform

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
- [High] Missing `polling-delay` in thermal zones using `generic-adc-thermal` renders thermal mitigation non-functional.
- [Medium] Mismatch between ADC channel definitions and pinctrl configurations causes bogus sensor readings.
--

--- Patch [3]: [PATCH v4 3/4] arm64: dts: qcom: Add PMIC thermal support for Shikra CQ2390M SoM platform ---
commit 0bee643f0fa64e35671928d7a4baae1362c3d049
Author: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>

arm64: dts: qcom: Add PMIC thermal support for Shikra CQ2390M SoM platform

This commit adds ADC channels for pa, quiet, and msm thermistors along with
their ADC thermal bridge nodes. It also configures thermal zones for PMIC
thermal mitigation on the Shikra CQ2390M SoM platform.

> diff --git a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
> index dc3861489f64d..139d0ad0b1ab2 100644
> --- a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
> +++ b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi

[ ... ]

> +	thermal-zones {
> +		sys-1-thermal {
> +			polling-delay-passive = <2000>;
> +			thermal-sensors = <&pa_therm_bridge>;

[Severity: High]
Does this thermal zone require a polling-delay property to function correctly?

The generic-adc-thermal driver relies entirely on software polling by the
thermal core since it doesn't support hardware temperature interrupts. Because
the trips defined below are only "hot" and not for passive cooling, passive
cooling is never engaged.

Without a polling-delay property, the core defaults to 0 and might never
schedule the delayed work to read the ADC, effectively disabling thermal
mitigation.

> +
> +			trips {
> +				active-config0 {
> +					temperature = <80000>;
> +					hysteresis = <2000>;
> +					type = "hot";
> +				};
> +			};
> +		};

[ ... ]

> +&pm4125_adc {
> +	pinctrl-0 = <&pm4125_adc_gpio5_default>, <&pm4125_adc_gpio6_default>;
> +	pinctrl-names = "default";
> +
> +	channel@4d {
> +		reg = <ADC5_AMUX_THM1_100K_PU>;
> +		label = "pa_therm";

[ ... ]

> +	channel@54 {
> +		reg = <ADC5_GPIO3_100K_PU>;
> +		label = "chgr_skin";
> +		qcom,ratiometric;
> +		qcom,hw-settle-time = <200>;
> +		qcom,pre-scaling = <1 1>;
> +	};
> +
> +	channel@55 {
> +		reg = <ADC5_GPIO4_100K_PU>;
> +		label = "gnss_therm";

[Severity: Medium]
Is there a mismatch between the pinctrl configuration and the ADC channels
being added here?

The pinctrl property for the ADC node configures gpio5 and gpio6 for ADC use,
but these new channels are mapped to ADC5_GPIO3 and ADC5_GPIO4.

Will these channels read from unconfigured pins and produce incorrect
temperature readings?

> +		qcom,ratiometric;
> +		qcom,hw-settle-time = <200>;
> +		qcom,pre-scaling = <1 1>;
> +	};
>  };

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260715-shikra_adc_support-v4-0-5e07b6d21429@oss.qualcomm.com?part=3

Re: [PATCH v4 4/4] arm64: dts: qcom: Add PMIC thermal support for Shikra IQ2390S SoM platform

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] Mismatched PMIC ADC channels and pinctrl configurations for thermistors.
--

--- Patch [4]: [PATCH v4 4/4] arm64: dts: qcom: Add PMIC thermal support for Shikra IQ2390S SoM platform ---
commit 5e80ce0d3c9c4dc567c3d3d335a508d11f309e50
Author: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>

arm64: dts: qcom: Add PMIC thermal support for Shikra IQ2390S SoM platform

This commit adds ADC channels for system thermistors used for thermal
mitigation. It includes ADC_TM nodes for PA, quiet, and MSM thermistors,
along with corresponding thermal zones.

> diff --git a/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi b/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi
> index 73945bf42112d..9ab0b44b00bed 100644
> --- a/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi
> +++ b/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi

[ ... ]

> +&pm8150_adc {
> +	pinctrl-0 = <&pm8150_adc_gpio2_default>, <&pm8150_adc_gpio3_default>;
> +	pinctrl-names = "default";
> +

[ ... ]

> +	channel@52 {
> +		reg = <ADC5_GPIO1_100K_PU>;
> +		label = "gnss_therm";
> +		qcom,ratiometric;
> +		qcom,hw-settle-time = <200>;
> +		qcom,pre-scaling = <1 1>;
> +	};
> +
> +	channel@55 {
> +		reg = <ADC5_GPIO4_100K_PU>;
> +		label = "pa_therm";
> +		qcom,ratiometric;
> +		qcom,hw-settle-time = <200>;
> +		qcom,pre-scaling = <1 1>;
> +	};
> +};

[Severity: High]
Is there a mismatch between the pinctrl configurations and the ADC channels
being used?

The pinctrl-0 property specifies configurations for gpio2 and gpio3, but the
ADC channels instruct the hardware to read from ADC5_GPIO1 and ADC5_GPIO4.

Could this result in the gnss_therm and pa_therm thermal zones reading
garbage data since they point to unconfigured PMIC GPIOs?

If the unconfigured pins float to a voltage that translates to a temperature
above the 125°C trip point, it might cause spurious system shutdowns or
unnecessary throttling.

[ ... ]

>  &pm8150_gpios {
> +	pm8150_adc_gpio2_default: pm8150-adc-gpio2-state {
> +		pins = "gpio2";
> +		function = PMIC_GPIO_FUNC_NORMAL;
> +		bias-high-impedance;
> +	};
> +
> +	pm8150_adc_gpio3_default: pm8150-adc-gpio3-state {
> +		pins = "gpio3";
> +		function = PMIC_GPIO_FUNC_NORMAL;
> +		bias-high-impedance;
> +	};
> +

[Severity: High]
Because these configurations explicitly target gpio2 and gpio3 instead of the
pins actually used by the ADC, does forcing them into high-impedance mode
risk breaking or interfering with whatever hardware is actually connected
to them?

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260715-shikra_adc_support-v4-0-5e07b6d21429@oss.qualcomm.com?part=4

Re: [PATCH v4 2/4] arm64: dts: qcom: pm8005: Add temp alarm node

[Konrad Dybcio]

On 7/15/26 9:42 AM, Jishnu Prakash wrote:
> Add temperature alarm node along with thermal zone used
> for PMIC thermal mitigation.
> 
> Co-developed-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
> Signed-off-by: Rakesh Kota <rakesh.kota@oss.qualcomm.com>
> Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad