linux-kernel - Re: [PATCH v1 4/6] dmaengine: fsl-edma: add i.mx7ulp edma2 version support

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Date:   Mon, 27 May 2019 07:31:01 +0000
From:   Robin Gong <yibin.gong@....com>
To:     "vkoul@...nel.org" <vkoul@...nel.org>
CC:     dl-linux-imx <linux-imx@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "festevam@...il.com" <festevam@...il.com>,
        "dan.j.williams@...el.com" <dan.j.williams@...el.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "robh@...nel.org" <robh@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>
Subject: Re: [PATCH v1 4/6] dmaengine: fsl-edma: add i.mx7ulp edma2 version
 support

On 2019-05-27 at 06:34 +0000, Vinod Koul wrote:
> On 10-05-19, 10:14, Robin Gong wrote:
> > 
> >  
> > +	if (of_device_is_compatible(np, "fsl,imx7ulp-edma")) {
> > +		fsl_edma->dmamux_nr = 1;
> > +		fsl_edma->version = v3;
> well this is not really scalable, we will keep adding versions and
> compatible and expanding this check. So it would make sense to create
> a
> driver data table which can be set for compatible and we use those
> values and avoid these runtime checks for compatible.
> 
> Btw the binding documentation should precede the code usage, so this
> patch should come after that
> 
Okay, will update in v2.