On Sun, 4 Nov 2018 00:10:23 +0100
Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> wrote:
> The 32-bit Meson8 SoC can use the SAR ADC to read the chip temperature.
> This requires setting the correct TSC (temperature sensor coefficient),
> which is programmed into the eFuse during the manufacturing process.
> Meson8b and Meson8m2 are not supported yet because they have a 5-bit TSC
> and only the first four bits are stored inside the SAR ADC registers.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
This 'seems' uncontroversial, but if I've missed something and the DT
maintainers want to comment that is of course great!
Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with it.
Thanks,
Jonathan
> ---
> .../devicetree/bindings/iio/adc/amlogic,meson-saradc.txt | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt
> index 54b823f3a453..325090e43ce6 100644
> --- a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt
> +++ b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt
> @@ -22,6 +22,12 @@ Required properties:
> - vref-supply: the regulator supply for the ADC reference voltage
> - #io-channel-cells: must be 1, see ../iio-bindings.txt
>
> +Optional properties:
> +- nvmem-cells: phandle to the temperature_calib eFuse cells
> +- nvmem-cell-names: if present (to enable the temperature sensor
> + calibration) this must contain "temperature_calib"
> +
> +
> Example:
> saradc: adc@8680 {
> compatible = "amlogic,meson-gxl-saradc", "amlogic,meson-saradc";
