linux-kernel - Re: [PATCH 1/2] [IDE] Platform IDE driver (was: MMIO IDE driver)

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Message-ID: <46A7AC17.9060309@ru.mvista.com>
Date:	Thu, 26 Jul 2007 00:01:27 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
Cc:	Vitaly Bordug <vitb@...nel.crashing.org>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org
Subject: Re: [PATCH 1/2] [IDE] Platform IDE driver (was: MMIO IDE driver)

Guennadi Liakhovetski wrote:

>>>>This is now very similar to pata_platform.c, they both use
>>>>same platform data structure and same resources.

>>>>To achieve that, byte_lanes_swapping platform data variable
>>>>and platform specified iops removed from that driver. It's fine,
>>>>since those were never used anyway.

>>>>pata_platform and ide_platform are carrying same driver names,
>>>>to easily switch between these drivers, without need to touch
>>>>platform code.

>>>Why? There's a drivers/ide/arm/ide_arm.c IDe driver that some platforms (not
>>>in the mainline) hack to access, e.g., CF cards in true-IDE mode. About a
>>>month ago I submitted a patch to arm-linux-kernel switching that 

>>   Wrong list to submit sych stuff, post to linux-ide.

> Not entirely. The patch (or other patches in the series) would also touch 
> ARM platforms in the mainline, currently using that driver. As I didn't 

    Was worth cross-posting to linux-ide anyway to get the IDE experts' 
feedback. ;-)

> have a chance to test them due to lack of hardware, I posted on arm, 
> asking if anyone would test those platforms for me.

   ... and they laughed at you? ;-)

>>>driver to using platform-device. I got a reply, that it's not worth it now
>>>that IDE is slowly becoming obsolete, and the pata_platform serves the
>>>perpose perfectly well. I found this argument reasonable, I had the same

>>   Ignore such replies in the future. ;-)

> It was largely in accordance with my own opinion, so, I chose to accept 
> it:-)

    It's not clear why you decided to waste time on it then. :-)

>>>doubt, just wanted to double-check. So, why do we now need a new legacy
>>>(a/drivers/ide/legacy/ide_platform.c) driver when a "modern" driver exists?

>>   Good question (I know the answer but won't tell ;-).

> You've been very cooperative, thanks.

    In fact, I also highly doubt that we need it.  What we'd need is an OF driver.

> Thanks
> Guennadi

WBR, Sergei
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