Re: [PATCH v2 3/4] arm64: dts: qcom: hamoa-pmics: define VADC for pmk8550

[Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>]

On 4/4/2026 6:25 PM, Aleksandrs Vinarskis wrote:
> Follow pattern of pmk8350 to add missing pmk8550 VADC to hamoa.
> Register address of 0x9000 matches example schema for spmi-adc5-gen3.
> 
> Signed-off-by: Aleksandrs Vinarskis <alex@vinarskis.com>
> ---
>  arch/arm64/boot/dts/qcom/hamoa-pmics.dtsi | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/hamoa-pmics.dtsi b/arch/arm64/boot/dts/qcom/hamoa-pmics.dtsi
> index 6a31a0adf8be472badea502a916cdbc9477e9f2b..cc69d299bc356d90aa1483f347f5eee43b853e45 100644
> --- a/arch/arm64/boot/dts/qcom/hamoa-pmics.dtsi
> +++ b/arch/arm64/boot/dts/qcom/hamoa-pmics.dtsi
> @@ -218,6 +218,32 @@ pon_resin: resin {
>  			};
>  		};
>  
> +		pmk8550_vadc: adc@9000 {
> +			compatible = "qcom,spmi-adc5-gen3";
> +			reg = <0x9000>, <0x9100>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			interrupts = <0x0 0x90 0x1 IRQ_TYPE_EDGE_RISING>,
> +				     <0x0 0x91 0x1 IRQ_TYPE_EDGE_RISING>;
> +			#io-channel-cells = <1>;
> +			#thermal-sensor-cells = <1>;
> +
> +			channel@3 {
> +				reg = <0x3>;
> +				label = "pmk8550_die_temp";
> +				qcom,pre-scaling = <1 1>;
> +			};
> +
> +			channel@44 {
> +				reg = <0x44>;
> +				label = "pmk8550_xo_therm";
> +				qcom,pre-scaling = <1 1>;
> +				qcom,ratiometric;
> +				qcom,hw-settle-time = <200>;
> +				qcom,adc-tm;

There's a small problem here - if you add the "qcom,adc-tm" property
under any channels, the auxiliary TM driver will be loaded to handle
this functionality and it will attempt to register such channels as
thermal devices. Since there is no thermal-zone node added for this
channel, you will get an error from here.

If you intend this channel to be used for ADC_TM functionality, a
thermal zone node for this channel has to be added. If this functionality
is not needed, it's better to remove the "qcom,adc-tm" property.

Thanks,
Jishnu

> +			};
> +		};
> +
>  		pmk8550_rtc: rtc@6100 {
>  			compatible = "qcom,pmk8350-rtc";
>  			reg = <0x6100>, <0x6200>;
>