[PATCH v8 02/11] dt-bindings: rtc: sun6i: Add H616 compatible string

Maxime Ripard maxime at cerno.tech
Mon Jul 26 07:41:37 PDT 2021


Hi,

On Fri, Jul 23, 2021 at 04:38:29PM +0100, Andre Przywara wrote:
> Add the obvious compatible name to the existing RTC binding.
> The actual RTC part of the device uses a different day/month/year
> storage scheme, so it's not compatible with the previous devices.
> Also the clock part is quite different, as there is no external 32K LOSC
> oscillator input.
> 
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
>
> ---
>  .../bindings/rtc/allwinner,sun6i-a31-rtc.yaml      | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml b/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
> index beeb90e55727..d8a6500e5840 100644
> --- a/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
> +++ b/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
> @@ -26,6 +26,7 @@ properties:
>            - const: allwinner,sun50i-a64-rtc
>            - const: allwinner,sun8i-h3-rtc
>        - const: allwinner,sun50i-h6-rtc
> +      - const: allwinner,sun50i-h616-rtc
>  
>    reg:
>      maxItems: 1
> @@ -104,6 +105,19 @@ allOf:
>            minItems: 3
>            maxItems: 3
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: allwinner,sun50i-h616-rtc
> +
> +    then:
> +      properties:
> +        clock-output-names:
> +          minItems: 3
> +          maxItems: 3

You don't need both of them when they are equal

> +        clocks: false
> +

It's not entirely clear to me what those clocks are about though. If we
look at the clock output in the user manual, it looks like there's only
two clocks that are actually being output: the 32k "fanout" clock and
the losc. What are the 3 you're talking about?

Also, it looks like the 32k fanout clock needs at least the hosc or
pll-periph in input, so we probably don't want to ask for no parent
clock?

Maxime
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