[PATCH 1/5] arm64: dts: mediatek: cherry: Add platform thermal configuration

[Chen-Yu Tsai]

On Thu, Apr 20, 2023 at 5:45 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno at collabora.com> wrote:
>
> This platform has three auxiliary NTC thermistors, connected to the
> SoC's ADC pins. Enable the auxadc in order to be able to read the
> ADC values, add a generic-adc-thermal LUT for each and finally assign
> them to the SoC's thermal zones.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
> ---
>  .../boot/dts/mediatek/mt8195-cherry.dtsi      | 105 ++++++++++++++++++
>  1 file changed, 105 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> index 8ac80a136c37..0820e9ba3829 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
> @@ -114,6 +114,77 @@ ppvar_sys: regulator-ppvar-sys {
>                 regulator-boot-on;
>         };
>
> +       /* Murata NCP03WF104F05RL */
> +       tboard_thermistor1: thermal-sensor-t1 {
> +               compatible = "generic-adc-thermal";
> +               #thermal-sensor-cells = <0>;
> +               io-channels = <&auxadc 0>;
> +               io-channel-names = "sensor-channel";
> +               temperature-lookup-table = <    (-10000) 1553
> +                                               (-5000) 1485
> +                                               0 1406
> +                                               5000 1317
> +                                               10000 1219
> +                                               15000 1115
> +                                               20000 1007
> +                                               25000 900
> +                                               30000 796
> +                                               35000 697
> +                                               40000 605
> +                                               45000 523
> +                                               50000 449
> +                                               55000 384
> +                                               60000 327
> +                                               65000 279
> +                                               70000 237
> +                                               75000 202
> +                                               80000 172
> +                                               85000 147
> +                                               90000 125
> +                                               95000 107
> +                                               100000 92
> +                                               105000 79
> +                                               110000 68
> +                                               115000 59
> +                                               120000 51
> +                                               125000 44>;
> +       };
> +
> +       tboard_thermistor2: thermal-sensor-t2 {
> +               compatible = "generic-adc-thermal";
> +               #thermal-sensor-cells = <0>;
> +               io-channels = <&auxadc 1>;
> +               io-channel-names = "sensor-channel";
> +               temperature-lookup-table = <    (-10000) 1553
> +                                               (-5000) 1485
> +                                               0 1406
> +                                               5000 1317
> +                                               10000 1219
> +                                               15000 1115
> +                                               20000 1007
> +                                               25000 900
> +                                               30000 796
> +                                               35000 697
> +                                               40000 605
> +                                               45000 523
> +                                               50000 449
> +                                               55000 384
> +                                               60000 327
> +                                               65000 279
> +                                               70000 237
> +                                               75000 202
> +                                               80000 172
> +                                               85000 147
> +                                               90000 125
> +                                               95000 107
> +                                               100000 92
> +                                               105000 79
> +                                               110000 68
> +                                               115000 59
> +                                               120000 51
> +                                               125000 44>;
> +       };
> +
>         usb_vbus: regulator-5v0-usb-vbus {
>                 compatible = "regulator-fixed";
>                 regulator-name = "usb-vbus";
> @@ -260,6 +331,10 @@ &gpu {
>         mali-supply = <&mt6315_7_vbuck1>;
>  };
>
> +&auxadc {
> +       status = "okay";
> +};
> +
>  &i2c0 {
>         status = "okay";
>
> @@ -1098,6 +1173,36 @@ mt6315_7_vbuck1: vbuck1 {
>         };
>  };
>
> +&thermal_zones {
> +       soc_area_ntc {
> +               polling-delay = <1000>;
> +               polling-delay-passive = <250>;
> +               thermal-sensors = <&tboard_thermistor1>;
> +
> +               trips {
> +                       trip-crit {
> +                               temperature = <95000>;
> +                               hysteresis = <2000>;
> +                               type = "critical";
> +                       };
> +               };
> +       };
> +
> +       pmic_area_ntc {
> +               polling-delay = <1000>;
> +               polling-delay-passive = <0>;
> +               thermal-sensors = <&tboard_thermistor2>;
> +
> +               trips {
> +                       trip-crit {
> +                               temperature = <95000>;
> +                               hysteresis = <2000>;
> +                               type = "critical";
> +                       };
> +               };
> +       };

I'm still getting:

thermal_sys: Failed to find 'trips' node
thermal_sys: Failed to find trip points for thermal-sensor-t1 id=0
generic-adc-thermal thermal-sensor-t1: Thermal zone sensor register failed: -22
generic-adc-thermal: probe of thermal-sensor-t1 failed with error -22
thermal_sys: Failed to find 'trips' node
thermal_sys: Failed to find trip points for thermal-sensor-t2 id=0
generic-adc-thermal thermal-sensor-t2: Thermal zone sensor register failed: -22
generic-adc-thermal: probe of thermal-sensor-t2 failed with error -22
thermal_sys: Failed to find 'trips' node
thermal_sys: Failed to find trip points for thermal-sensor-t3 id=0
generic-adc-thermal thermal-sensor-t3: Thermal zone sensor register failed: -22
generic-adc-thermal: probe of thermal-sensor-t3 failed with error -22



> +};
> +
>  &u3phy0 {
>         status = "okay";
>  };
> --
> 2.40.0
>
>