Re: [PATCH 4/4] arm64: dts: exynos850-e850-96: add soc thermistor node

[Peter Griffin]

On Thu, 1 Oct 2026 at 04:09, Alexey Klimov <alexey.klimov@xxxxxxxxxx> wrote:
>
> The WinLink E850-96 board has a Murata NCP03WF104 NTC thermistor placed
> near the SoC package die and connected to channel 0 of the CMGP ADC.
>
> Enable the ADC node, define a dummy 1.8V regulator supply for ADC, and
> add the board-level thermistor node linked to channel 0 of exynos_adc.
> Regulator is represented as a dummy one because we lack PMIC support and
> should be replaced with a real one when PMIC support will be implemented.
>
> Signed-off-by: Alexey Klimov <alexey.klimov@xxxxxxxxxx>
> ---

Reviewed-by: Peter Griffin <peter.griffin@xxxxxxxxxx>

>  arch/arm64/boot/dts/exynos/exynos850-e850-96.dts | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> index afef32ad4ee2..1abae8b9fa49 100644
> --- a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> +++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> @@ -126,6 +126,14 @@ reg_dummy: regulator-0 {
>                 regulator-name = "dummy_reg";
>         };
>
> +       /* TODO: Remove this once PMIC is implemented  */
> +       vdd_1v8_dummy: regulator-1v8 {
> +               compatible = "regulator-fixed";
> +               regulator-name = "vdd_1v8_dummy";
> +               regulator-min-microvolt = <1800000>;
> +               regulator-max-microvolt = <1800000>;
> +       };
> +
>         reg_usb_host_vbus: regulator-1 {
>                 compatible = "regulator-fixed";
>                 regulator-name = "usb_host_vbus";
> @@ -166,6 +174,20 @@ rtcclk: clock-rtcclk {
>                 #clock-cells = <0>;
>                 clock-frequency = <32768>;
>         };
> +
> +       thermistor-soc {
> +               compatible = "murata,ncp03wf104";
> +               pullup-uv = <1800000>;
> +               pullup-ohm = <100000>;
> +               pulldown-ohm = <0>;
> +               io-channels = <&exynos_adc 0>;
> +               #thermal-sensor-cells = <0>;
> +       };
> +};
> +
> +&exynos_adc {
> +       status = "okay";
> +       vdd-supply = <&vdd_1v8_dummy>;
>  };
>
>  &cmu_hsi {
>
> --
> 2.51.0
>