linux-kernel - RE: [PATCH v3 1/4] dt-bindings: mfd: aspeed: support for AST2700

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Message-ID:
 <OS8PR06MB7541FDB6A74119A160B1A57CF2632@OS8PR06MB7541.apcprd06.prod.outlook.com>
Date: Thu, 19 Sep 2024 07:13:28 +0000
From: Ryan Chen <ryan_chen@...eedtech.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, "mturquette@...libre.com"
	<mturquette@...libre.com>, "sboyd@...nel.org" <sboyd@...nel.org>,
	"robh@...nel.org" <robh@...nel.org>, "krzk+dt@...nel.org"
	<krzk+dt@...nel.org>, "conor+dt@...nel.org" <conor+dt@...nel.org>,
	"joel@....id.au" <joel@....id.au>, "andrew@...econstruct.com.au"
	<andrew@...econstruct.com.au>, "p.zabel@...gutronix.de"
	<p.zabel@...gutronix.de>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-clk@...r.kernel.org"
	<linux-clk@...r.kernel.org>, "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>
Subject: RE: [PATCH v3 1/4] dt-bindings: mfd: aspeed: support for AST2700

> Subject: Re: [PATCH v3 1/4] dt-bindings: mfd: aspeed: support for AST2700
> 
> On 19/09/2024 08:05, Ryan Chen wrote:
> >>> diff --git
> >>> a/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml
> >>> b/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml
> >>> index 86ee69c0f45b..127a357051cd 100644
> >>> --- a/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml
> >>> +++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2x00-scu.yaml
> >>> @@ -9,6 +9,8 @@ title: Aspeed System Control Unit
> >>>  description:
> >>>    The Aspeed System Control Unit manages the global behaviour of
> >>> the
> >> SoC,
> >>>    configuring elements such as clocks, pinmux, and reset.
> >>> +  In AST2700 SOC which has two soc connection, each soc have its
> >>> + own scu  register control, ast2700-scu0 for soc0, ast2700-scu1 for
> soc1.
> >>>
> >>>  maintainers:
> >>>    - Joel Stanley <joel@....id.au>
> >>> @@ -21,6 +23,8 @@ properties:
> >>>            - aspeed,ast2400-scu
> >>>            - aspeed,ast2500-scu
> >>>            - aspeed,ast2600-scu
> >>> +          - aspeed,ast2700-scu0
> >>> +          - aspeed,ast2700-scu1
> >>>        - const: syscon
> >>>        - const: simple-mfd
> >>>
> >>> @@ -30,10 +34,12 @@ properties:
> >>>    ranges: true
> >>>
> >>>    '#address-cells':
> >>> -    const: 1
> >>> +    minimum: 1
> >>> +    maximum: 2
> >>>
> >>>    '#size-cells':
> >>> -    const: 1
> >>> +    minimum: 1
> >>> +    maximum: 2
> >>
> >> Why do the children have 64 bit addressing?
> >
> > AST2700 is 64bit address, so it also.
> 
> But why do they need it?
> 
Sorry, I may not understand your point.
Since address-cell = <2>, Do you mean size-cell still 1?
If yes. I do the dts check it need size-cells=<2>, when I do address-cells = <2>
> 
> Best regards,
> Krzysztof