linux-kernel - Re: [PATCH 3/4] [SCSI] ufs: Add AMBA glue driver to ufshcd

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Message-ID: <CAKVbJB-sxxU4opKWKZk8X3WS=nd_EvoxUPpvg4+AXhaQZkLk1A@mail.gmail.com>
Date:	Wed, 11 Jul 2012 09:50:43 +0530
From:	vinayak holikatti <vinholikatti@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	James.Bottomley@...senpartnership.com, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, patches@...aro.org,
	linux-samsung-soc@...r.kernel.org, santoshsy@...il.com,
	arnd@...aro.org, girish.shivananjappa@...aro.org,
	saugata.das@...aro.org, vishak.g@...sung.com, venkat@...aro.org,
	k.rajesh@...sung.com, yejin.moon@...sung.com, dsaxena@...aro.org,
	ilho215.lee@...sung.com, nala.la@...sung.com,
	stephen.doel@...aro.org, sreekumar.c@...sung.com
Subject: Re: [PATCH 3/4] [SCSI] ufs: Add AMBA glue driver to ufshcd

On Mon, Jul 2, 2012 at 8:50 PM, Arnd Bergmann <arnd@...db.de> wrote:
> On Monday 02 July 2012, Vinayak Holikatti wrote:
>> +static struct amba_id ufshcd_amba_ids[] = {
>> +       {
>> +               /* Fake id for Primecell.*/
>> +               .id     = 0x00041FF0,
>> +               .mask   = 0x000fffff,
>> +       },
>> +       { 0, 0 },
>> +};
>
> Hi Vinayak,
>
> Can you explain where this fake ID comes from? Is this ID actually
> used by any hardware that is around somewhere? If not, I think it
> would be better not to provide an AMBA driver at all, but instead
> use the platform driver from patch 2 for all non-PCI uses.
The fake ID is just a dummy ID. As you say, we will drop the amba driver
for now. When primecell controller comes up, we will have the driver integrated.
>
>         Arnd
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