Re: [PATCH v3 27/30] ARM: dts: sun8i: h3: use calibration for ths

Emmanuel Vadot
2018-09-04T16:46:29Z

Hi Philipp,

On Thu, 30 Aug 2018 17:45:15 +0200
Philipp Rossak <embed3d@gmail.com> wrote:

> The H3 SID is supported by the kernel so we can add a NVMEM Data cell,
> that contains the calibration data.
>
> On the H3 the eFuses are located at the offset 0x200. The thermal data
> itself has an offset of 0x34 from the eFuse base. So we end on an offset
> of 0x234.
>
> Signed-off-by: Philipp Rossak <embed3d@gmail.com>
> ---
> arch/arm/boot/dts/sun8i-h3.dtsi | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> index 1866aec69ec1..0fc447f0c02a 100644
> --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> @@ -106,8 +106,15 @@
>
> soc {
> sid: eeprom@1c14000 {
> + #address-cells = <1>;
> + #size-cells = <1>;
> compatible = "allwinner,sun8i-h3-sid";
> reg = <0x01c14000 0x400>;
> +
> + /* Data cells */
> + thermal_calibration: calib@234 {
> + reg = <0x234 0x8>;
> + };

You are declaring 8 bytes of calibration data but to my knowledge it's
only 2 bytes per sensor, so 2 bytes for H3.
Am I missing something ?

Thanks,
> };
> };
>
> @@ -227,4 +234,6 @@
> &ths {
> compatible = "allwinner,sun8i-h3-ths";
> #thermal-sensor-cells = <0>;
> + nvmem-cells = <&thermal_calibration>;
> + nvmem-cell-names = "calibration";
> };
> --
> 2.11.0
>
>
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--
Emmanuel Vadot <manu@bidouilliste.com> <manu@freebsd.org>