RE: [PATCH 1/4] dt-bindings: mfd: aspeed: support for AST2700

[Ryan Chen <ryan_chen@aspeedtech.com>]

> Subject: Re: [PATCH 1/4] dt-bindings: mfd: aspeed: support for AST2700
>
> On 09/08/2024 07:55, Ryan Chen wrote:
> >> Subject: Re: [PATCH 1/4] dt-bindings: mfd: aspeed: support for
> >> AST2700
> >>
> >> On 08/08/2024 09:59, Ryan Chen wrote:
> >>> Add compatible support for AST2700 clk, reset, pinctrl, silicon-id
> >>> and example for AST2700 scu.
> >>>
> >>> Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
> >>> ---
> >>>  .../bindings/mfd/aspeed,ast2x00-scu.yaml      | 31
> >> +++++++++++++++++--
> >>>  1 file changed, 29 insertions(+), 2 deletions(-)
> >>>
> >>> diff --git
> >>> a/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml
> >>> b/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml
> >>> index 86ee69c0f45b..c0965f08ae8c 100644
> >>> --- a/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml
> >>> +++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml
> >>> @@ -21,6 +21,8 @@ properties:
> >>>            - aspeed,ast2400-scu
> >>>            - aspeed,ast2500-scu
> >>>            - aspeed,ast2600-scu
> >>> +          - aspeed,ast2700-scu0
> >>> +          - aspeed,ast2700-scu1
> >>
> >> What are the differences between these two?
> >
> > The next [PATCH 4/4] is scu driver that include ast2700-scu0 and
> > ast2700-scu1 CLK_OF_DECLARE_DRIVER(ast2700_soc0,
> > "aspeed,ast2700-scu0", ast2700_soc0_clk_init);
> > CLK_OF_DECLARE_DRIVER(ast2700_soc1, "aspeed,ast2700-scu1",
> > ast2700_soc1_clk_init);
>
> What are hardware differences? Entirely different devices?

AST2700 have two soc die connected each other.
Each soc die have it own scu, so the naming is ast2700-scu0 for soc0, another is ast2700-scu1 for soc1.

>
> > So I add these two.
> >
> >>
> >>>        - const: syscon
> >>>        - const: simple-mfd
> >>>
> >>> @@ -30,10 +32,12 @@ properties:
> >>>    ranges: true
> >>>
> >>>    '#address-cells':
> >>> -    const: 1
> >>> +    minimum: 1
> >>> +    maximum: 2
> >>>
> >>>    '#size-cells':
> >>> -    const: 1
> >>> +    minimum: 1
> >>> +    maximum: 2
> >>>
> >>>    '#clock-cells':
> >>>      const: 1
> >>> @@ -56,6 +60,8 @@ patternProperties:
> >>>              - aspeed,ast2400-pinctrl
> >>>              - aspeed,ast2500-pinctrl
> >>>              - aspeed,ast2600-pinctrl
> >>> +            - aspeed,ast2700-soc0-pinctrl
> >>> +            - aspeed,ast2700-soc1-pinctrl
> >>>
> >>>      required:
> >>>        - compatible
> >>> @@ -76,6 +82,7 @@ patternProperties:
> >>>                - aspeed,ast2400-silicon-id
> >>>                - aspeed,ast2500-silicon-id
> >>>                - aspeed,ast2600-silicon-id
> >>> +              - aspeed,ast2700-silicon-id
> >>>            - const: aspeed,silicon-id
> >>>
> >>>        reg:
> >>> @@ -115,4 +122,24 @@ examples:
> >>>              reg = <0x7c 0x4>, <0x150 0x8>;
> >>>          };
> >>>      };
> >>> +  - |
> >>> +    soc0 {
> >>> +        #address-cells = <2>;
> >>> +        #size-cells = <2>;
> >>
> >> That's the same example as previous, right? The drop, no need.
> >
> > AST2700 is 64bits address mode platform, that the reason.
> > So I add example for 64bits platform descript in dtsi I have to add
> > soc0 to be address-cells and size-cells to be <2> Then I can define
> > the register to be 64bits address and size.
>
> That's trivial. Drop.
Do you mean, I don’t need add example for ast2700-scu0?

Or delete #address-cells = <2>;  #size-cells = <2>;
If I remove it will make dt_binding_check fail.
>
> >>
> >> Best regards,
> >> Krzysztof
> >
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> Best regards,
> Krzysztof

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