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

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Message-ID:
 <OS8PR06MB7541F4F740FDB17F50EBCACBF2BA2@OS8PR06MB7541.apcprd06.prod.outlook.com>
Date: Fri, 9 Aug 2024 06:10:22 +0000
From: Ryan Chen <ryan_chen@...eedtech.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, Lee Jones <lee@...nel.org>, Rob
 Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor
 Dooley <conor+dt@...nel.org>, Joel Stanley <joel@....id.au>, Andrew Jeffery
	<andrew@...econstruct.com.au>, Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-aspeed@...ts.ozlabs.org"
	<linux-aspeed@...ts.ozlabs.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-clk@...r.kernel.org"
	<linux-clk@...r.kernel.org>
Subject: RE: [PATCH 1/4] dt-bindings: mfd: aspeed: support for AST2700

> 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@...eedtech.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
> >
> > ************* Email Confidentiality Notice ********************
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> >
> > DISCLAIMER:
> > This message (and any attachments) may contain legally privileged and/or
> other confidential information. If you have received it in error, please notify the
> sender by reply e-mail and immediately delete the e-mail and any
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>
> Maybe I am the intended recipient of your message, maybe not. I don't want
> to have any legal questions regarding upstream, public collaboration, thus
> probably I should just remove your messages.
>
> Please talk with your IT that such disclaimers in open-source are not desired
> (and maybe even harmful).
> If you do not understand why, please also see:
> https://www.youtube.com/live/fMeH7wqOwXA?si=GY7igfbda6vnjXlJ&t=835
>
> If you need to go around company SMTP server, then consider using b4
> web-relay: https://b4.docs.kernel.org/en/latest/contributor/send.html
>
> I will not respond to any other confidential emails. That's the last one you got.
>
> To be clear: all messages from your company will be made published. By
> responding to this email you agree that all communications from you and/or
> your company is made public.
>
> Best regards,
> Krzysztof

************* Email Confidentiality Notice ********************
免責聲明:
本信件(或其附件)可能包含機密資訊，並受法律保護。如 台端非指定之收件者，請以電子郵件通知本電子郵件之發送者, 並請立即刪除本電子郵件及其附件和銷毀所有複印件。謝謝您的合作!

DISCLAIMER:
This message (and any attachments) may contain legally privileged and/or other confidential information. If you have received it in error, please notify the sender by reply e-mail and immediately delete the e-mail and any attachments without copying or disclosing the contents. Thank you.