Re: [PATCH RFC 4/6] dt-bindings: rtc: isl1208: Document built-in RTC device on PMIC RAA215300

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On 03/05/2023 10:46, Biju Das wrote:
> The Built-in RTC device found on PMIC RAA215300 is similar to the isl1208
> IP. However, RTC is enabled by PMIC RAA215300 and the polarity of the
> external oscillator is determined by the PMIC revision.
> 
> Document renesas,raa215300-isl1208 compatible and renesas,raa215300-pmic
> property to handle these differences.
> 
> Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> ---
>  .../devicetree/bindings/rtc/isil,isl1208.yaml       | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml b/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
> index 04d51887855f..888a832ed1db 100644
> --- a/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
> +++ b/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
> @@ -18,6 +18,7 @@ properties:
>            - isil,isl1209
>            - isil,isl1218
>            - isil,isl1219
> +          - renesas,raa215300-isl1208
>  
>    reg:
>      maxItems: 1
> @@ -40,6 +41,10 @@ properties:
>          <0> : Enable internal pull-up
>          <1> : Disable internal pull-up
>  
> +  renesas,raa215300-pmic:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: phandle to the pmic device with isl1208 built-in RTC.

No. You don't need cross-linking. We do not represent one device as two
and then fix this by cross-linking them. The existing binding does not
have it, so it should be a hint for you.

Best regards,
Krzysztof




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