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

From: Nícolas F. R. A. Prado
Date: Fri Apr 21 2023 - 16:53:18 EST

On Fri, Apr 21, 2023 at 03:37:52PM +0800, Chen-Yu Tsai wrote:
> On Thu, Apr 20, 2023 at 5:45 PM AngeloGioacchino Del Regno
> <angelogioacchino.delregno@xxxxxxxxxxxxx> 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@xxxxxxxxxxxxx>
> > ---
> > .../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 {

Not sure if that's what's causing the issue, but the thermal zone name should
end with -thermal as per the binding. Also note that it needs to be under 20
characters otherwise it will fail to be registered with -22 like below.
(Also, node names shouldn't contain underscore)

Thanks,
Nícolas

> > + 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
> >
> >