linux-kernel - Re: [PATCH v2 2/6] dt-bindings: dma: dw: Add max burst transaction length property

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Message-ID: <20200508111242.GH185537@smile.fi.intel.com>
Date:   Fri, 8 May 2020 14:12:42 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Vinod Koul <vkoul@...nel.org>, Viresh Kumar <vireshk@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Paul Burton <paulburton@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Arnd Bergmann <arnd@...db.de>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-mips@...r.kernel.org, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/6] dt-bindings: dma: dw: Add max burst transaction
 length property

On Fri, May 08, 2020 at 01:53:00PM +0300, Serge Semin wrote:
> This array property is used to indicate the maximum burst transaction
> length supported by each DMA channel.

> +  snps,max-burst-len:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    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 (data-width) field.
> +    items:
> +      maxItems: 8
> +      items:

> +        enum: [4, 8, 16, 32, 64, 128, 256]

Isn't 1 allowed?

> +        default: 256

-- 
With Best Regards,
Andy Shevchenko