linux-kernel - Re: [PATCH] tmio_mmc: Allow 2 byte requests in 4-bit mode

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Date:	Tue, 27 Jul 2010 17:05:33 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	Ian Molton <ian@...menth.co.uk>
Cc:	Yusuke Goda <yusuke.goda.sx@...esas.com>, damm@...nsource.se,
	sameo@...ux.intel.com, Paul Mundt <lethal@...ux-sh.org>,
	g.liakhovetski@....de, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] tmio_mmc: Allow 2 byte requests in 4-bit mode

> On 23 July 2010 12:05, Magnus Damm <magnus.damm@...il.com> wrote:
>> 2010/7/20 Yusuke Goda <yusuke.goda.sx@...esas.com>:
>>> Adjust the tmio_mmc block size check to accept 2-byte requests in 4-bit mode.
>>> Tested with the SDHI hardware block included in sh7724.
>>>
>>> Signed-off-by: Yusuke Goda <yusuke.goda.sx@...esas.com>
>>
>> With this patch applied I can use SDIO cards in polling mode with the
>> tmio-mmc driver. Tested with the SDHI hardware block on sh7372 using
>> the b43 driver and BCM4318 hardware and the unfortunately out-of-tree
>> AR6002 "android" driver.
>>
>> Acked-by: Magnus Damm <damm@...nsource.se>
>>

Hi Ian,

Thanks for your feedback!

On Tue, Jul 27, 2010 at 4:57 PM, Ian Molton <ian@...menth.co.uk> wrote:
> This change needs to be modified to test what hardware is present.
> this wont work on my hardware TTBOMK.

Ok, just curious, on which platform did you test it?

On SDHI hardware the 2-byte access works just fine in 4-bit mode.

Thanks,

/ magnus
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