2020-12-21 18:17:37

by Martin Blumenstingl

Subject: [PATCH 2/5] ARM: dts: meson: add the ADC thermal sensor to meson.dtsi

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 <[email protected]>
---
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>;
--
2.29.2

2021-01-11 14:07:38

by Neil Armstrong

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 <[email protected]>
> ---
> 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 <[email protected]>