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Message-ID: <3238685.5fSG56mABF@steina-w>
Date: Fri, 12 Jul 2024 08:08:05 +0200
From: Alexander Stein <alexander.stein@...tq-group.com>
To: linux-arm-kernel@...ts.infradead.org
Cc: York Sun <york.sun@....com>, Borislav Petkov <bp@...en8.de>, Tony Luck <tony.luck@...el.com>, James Morse <james.morse@....com>, Mauro Carvalho Chehab <mchehab@...nel.org>, Robert Richter <rric@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>, Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, linux-arm-kernel@...ts.infradead.org, linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org, Borislav Petkov <bp@...e.de>, devicetree@...r.kernel.org, imx@...ts.linux.dev, Frank Li <Frank.li@....com>
Subject: Re: [PATCH 4/6] dt-bindings: memory: fsl: Add compatible string nxp, imx9-memory-controller

Hi Frank,

Am Freitag, 12. Juli 2024, 05:27:54 CEST schrieb Frank Li:
> On Wed, Jul 10, 2024 at 09:18:16AM +0200, Alexander Stein wrote:
> > Hi Frank,
> > 
> > Am Dienstag, 9. Juli 2024, 22:23:05 CEST schrieb Frank Li:
> > > iMX9 memory controller is similar with other layerscape chips. But some
> > > register layout has a little bit difference, so add new compatible string
> > > 'nxp,imx9-memory-controller' for it.
> > 
> > Is this controller the same for all i.MX9 SoC? E.g. i.MX91, i.MX93,
> > i.MX95 and any future variants?
> 
> So far it is the same. I can't prodicting future. Not plan to change it
> yet.

Okay, thanks for clarification. If DT maintainers are okay this way, I do not object.

Best regards,
Alexander

> Frank 
> 
> > 
> > Best regards,
> > Alexander
> > 
> > > imx9 need two 'reg', one for DDR controller and the other is ECC inject
> > > engine register space. Keep the same restriction for other compatible
> > > string.
> > > 
> > > Signed-off-by: Frank Li <Frank.Li@....com>
> > > ---
> > >  .../bindings/memory-controllers/fsl/fsl,ddr.yaml   | 31 +++++++++++++++++++++-
> > >  1 file changed, 30 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,ddr.yaml b/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,ddr.yaml
> > > index 84f778a99546b..e0786153eec73 100644
> > > --- a/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,ddr.yaml
> > > +++ b/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,ddr.yaml
> > > @@ -40,6 +40,7 @@ properties:
> > >            - fsl,p1021-memory-controller
> > >            - fsl,p2020-memory-controller
> > >            - fsl,qoriq-memory-controller
> > > +          - nxp,imx9-memory-controller
> > >  
> > >    interrupts:
> > >      maxItems: 1
> > > @@ -51,13 +52,41 @@ properties:
> > >      type: boolean
> > >  
> > >    reg:
> > > -    maxItems: 1
> > > +    items:
> > > +      - description: Controller register space
> > > +      - description: Inject register space
> > > +    minItems: 1
> > > +
> > > +  reg-names:
> > > +    items:
> > > +      - const: ctrl
> > > +      - const: inject
> > > +    minItems: 1
> > >  
> > >  required:
> > >    - compatible
> > >    - interrupts
> > >    - reg
> > >  
> > > +allOf:
> > > +  - if:
> > > +      properties:
> > > +        compatible:
> > > +          contains:
> > > +            enum:
> > > +              - nxp,imx9-memory-controller
> > > +    then:
> > > +      properties:
> > > +        reg:
> > > +          minItems: 2
> > > +        reg-names:
> > > +          minItems: 2
> > > +    else:
> > > +      properties:
> > > +        reg:
> > > +          maxItems: 1
> > > +        reg-names: false
> > > +
> > >  additionalProperties: false
> > >  
> > >  examples:
> > > 
> > > 
> > 
> > 
> 
> 
> 


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