linux-kernel - Re: [PATCH 2/5] ARM: dts: meson: add the ADC thermal sensor to meson.dtsi

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Message-ID: <e5bfa1ec-678d-0c60-bf0b-073c059ba843@baylibre.com>
Date:   Mon, 11 Jan 2021 15:03:22 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-amlogic@...ts.infradead.org, khilman@...libre.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] ARM: dts: meson: add the ADC thermal sensor to
 meson.dtsi

On 21/12/2020 19:13, Martin Blumenstingl wrote:
> The SoC temperature can be retrieved from ADC channel 8 on all 32-bit
> SoCs (Meson6, Meson8, Meson8b and Meson8m2). Add a "generic-adc-thermal"
> instance to meson.dtsi so the thermal sensor is available for all SoCs.
> If the temperature sensor calibration data is missing for a board then
> the "generic-adc-thermal" will not probe and not register a thermal
> sensor.
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> ---
>  arch/arm/boot/dts/meson.dtsi | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/meson.dtsi b/arch/arm/boot/dts/meson.dtsi
> index 5f074f7aa1a2..e0ca5f08d07d 100644
> --- a/arch/arm/boot/dts/meson.dtsi
> +++ b/arch/arm/boot/dts/meson.dtsi
> @@ -298,6 +298,13 @@ efuse: nvmem@0 {
>  		};
>  	};
>  
> +	thermal_sensor: thermal-sensor {
> +		compatible = "generic-adc-thermal";
> +		#thermal-sensor-cells = <0>;
> +		io-channels = <&saradc 8>;
> +		io-channel-names = "sensor-channel";
> +	};
> +
>  	xtal: xtal-clk {
>  		compatible = "fixed-clock";
>  		clock-frequency = <24000000>;
> 

Reviewed-by: Neil Armstrong <narmstrong@...libre.com>