linux-kernel - Re: [PATCH 4/4] mmc: omap_hsmmc: Simplify init for twl6030 MMC card detect

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Date:	Thu, 8 Mar 2012 21:23:10 +0530
From:	"T Krishnamoorthy, Balaji" <balajitk@...com>
To:	Chris Ball <cjb@...top.org>
Cc:	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Tony Lindgren <tony@...mide.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Rajendra Nayak <rnayak@...com>
Subject: Re: [PATCH 4/4] mmc: omap_hsmmc: Simplify init for twl6030 MMC card detect

On Wed, Mar 7, 2012 at 9:12 PM, Chris Ball <cjb@...top.org> wrote:
> Hi Balaji,
>
> On Wed, Mar 07 2012, T Krishnamoorthy, Balaji wrote:
>> OMAP4 and OMAP3 HSMMC IP registers differ by 0x100 offset.
>> Addng the offset to platform_device resource structure
>> increments the start address for every insmod operation.
>> MMC command fails on re-insertion as module due incorrect register base.
>> Fix this by updating the ioremap base address only.
>>
>> Signed-off-by: Balaji T K <balajitk@...com>
>
> Is this a regression, or has it never worked in mainline?

Not a regression introduced in current merge window.
It happens on re-insertion of module.
will post a patch with $SUBJECT

>
>> Note:  eMMC detection is still failing on resertion due to card vcc
>> power off on rmmod
>
> And this?

This issue was hidden and uncovered after this fix.
This problem is Vcc being powered off without sleep command.

>
> Thanks,
>
> - Chris.
> --
> Chris Ball   <cjb@...top.org>   <http://printf.net/>
> One Laptop Per Child
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