linux-kernel - Re: [PATCH 2/5] dt-bindings: dma: dw: Add max burst transaction length property bindings

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Date:   Sat, 11 Apr 2020 21:21:59 +0300
From:   Sergey Semin <Sergey.Semin@...kalelectronics.ru>
To:     Rob Herring <robh@...nel.org>
CC:     Vinod Koul <vkoul@...nel.org>, Mark Rutland <mark.rutland@....com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Paul Burton <paulburton@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/5] dt-bindings: dma: dw: Add max burst transaction
 length property bindings

On Thu, Mar 12, 2020 at 04:33:30PM -0500, Rob Herring wrote:
> On Fri, Mar 06, 2020 at 04:10:31PM +0300, Sergey.Semin@...kalelectronics.ru wrote:
> > From: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> > 
> > This array property is used to indicate the maximum burst transaction
> > length supported by each DMA channel.
> > 
> > Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> > Signed-off-by: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
> > Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> > Cc: Paul Burton <paulburton@...nel.org>
> > Cc: Ralf Baechle <ralf@...ux-mips.org>
> > ---
> >  .../devicetree/bindings/dma/snps,dma-spear1340.yaml  | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
> > index d7f9383ceb8f..308ec6482064 100644
> > --- a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
> > +++ b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
> > @@ -126,6 +126,18 @@ properties:
> >            enum: [0, 1]
> >            default: 0
> >  
> > +  snps,max-burst-len:
> > +    description: |
> > +      Maximum length of burst transactions supported by hardware.
> > +      It's an array property with one cell per channel in units of
> > +      CTLx register SRC_TR_WIDTH/DST_TR_WIDTH field.
> > +    allOf:
> > +      - $ref: /schemas/types.yaml#/definitions/uint32-array
> > +      - maxItems: 8
> > +        items:
> > +          enum: [4, 8, 16, 32, 64, 128, 256]
> > +          default: 0
> 
> The default needs to be an allowed value in the enum.

Right. I'll fix it.

-Sergey

> 
> Rob