linux-kernel - Re: [PATCH 1/5] dt-bindings: mtd: gpmi-nand: Add 'fsl,imx8qxp-gpmi-nand' compatible string

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Date: Fri, 17 May 2024 17:09:20 -0400
From: Frank Li <Frank.li@....com>
To: Miquel Raynal <miquel.raynal@...tlin.com>
Cc: Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Han Xu <han.xu@....com>,
	Vinod Koul <vkoul@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Marek Vasut <marex@...x.de>,
	linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/5] dt-bindings: mtd: gpmi-nand: Add
 'fsl,imx8qxp-gpmi-nand' compatible string

On Fri, May 17, 2024 at 09:50:55PM +0200, Miquel Raynal wrote:
> Hi Frank,
> 
> Frank.li@....com wrote on Fri, 17 May 2024 15:15:42 -0400:
> 
> > On Fri, May 17, 2024 at 08:36:21PM +0200, Miquel Raynal wrote:
> > > Hi Frank,
> > > 
> > > Frank.Li@....com wrote on Fri, 17 May 2024 14:09:48 -0400:
> > >   
> > > > Add 'fsl,imx8qxp-gpmi-nand' compatible string and clock-names restriction.
> > > > 
> > > > Signed-off-by: Frank Li <Frank.Li@....com>
> > > > ---
> > > >  .../devicetree/bindings/mtd/gpmi-nand.yaml         | 22 ++++++++++++++++++++++
> > > >  1 file changed, 22 insertions(+)
> > > > 
> > > > diff --git a/Documentation/devicetree/bindings/mtd/gpmi-nand.yaml b/Documentation/devicetree/bindings/mtd/gpmi-nand.yaml
> > > > index 021c0da0b072f..f9eb1868ca1f4 100644
> > > > --- a/Documentation/devicetree/bindings/mtd/gpmi-nand.yaml
> > > > +++ b/Documentation/devicetree/bindings/mtd/gpmi-nand.yaml
> > > > @@ -24,6 +24,7 @@ properties:
> > > >            - fsl,imx6q-gpmi-nand
> > > >            - fsl,imx6sx-gpmi-nand
> > > >            - fsl,imx7d-gpmi-nand
> > > > +          - fsl,imx8qxp-gpmi-nand
> > > >        - items:
> > > >            - enum:
> > > >                - fsl,imx8mm-gpmi-nand
> > > > @@ -151,6 +152,27 @@ allOf:
> > > >              - const: gpmi_io
> > > >              - const: gpmi_bch_apb
> > > >  
> > > > +  - if:
> > > > +      properties:
> > > > +        compatible:
> > > > +          contains:
> > > > +            enum:
> > > > +              - fsl,imx8qxp-gpmi-nand
> > > > +    then:
> > > > +      properties:
> > > > +        clocks:
> > > > +          items:
> > > > +            - description: SoC gpmi io clock
> > > > +            - description: SoC gpmi apb clock  
> > > 
> > > I believe these two clocks are mandatory?  
> > 
> > minItems default is equal to items numbers, here is 4. So all 4 clock are
> > mandatory.
> > 
> > Anything wrong here?
> 
> I'd say that the two "bch" clocks are only used if you decide to
> configure the on-host hardware ECC engine and thus are not needed with
> software corrections, but I'm fine keeping the fourth described in all
> cases if that's simpler.
> 
> Also,here the diff just shows that "if we provide a clocks property
> with this compatible, then we need to provide 4 members", I believe the
> "required" property is already filled somewhere with the
> clocks/clock-names properties?

yes, before allOf

required:
..                                                                 
  - clocks                                                                 
  - clock-names                                                            
..

> 
> Thanks,
> Miquèl