Re: [PATCH] mmc: Always check for lower base frequency quirk forRicoh 1180:e823

From: Josh Boyer
Date: Wed Oct 05 2011 - 12:43:16 EST

On Wed, Oct 05, 2011 at 11:27:01AM -0500, Manoj Iyer wrote:
> On Wed, 5 Oct 2011, Josh Boyer wrote:
> >Commit 15bed0f2f added a quirk for the e823 Ricoh card reader to lower the
> >base frequency. However, the quirk first checks to see if the proprietary
> >MMC controller is disabled, and returns if so. On some devices, such as the
> >Lenovo X220, the MMC controller is already disabled by firmware it seems,
> It is possible that the newer firmware from Lenovo disables the MMC
> controller. When the patch was done, these laptops had just been
> announced, so they had a very early version of the firmware (ver
> 1.02 iirc).

Seems so. The X220 laptop I debugged this on shows:

[jwboyer@zod linux-2.6]$ cat /sys/devices/virtual/dmi/id/bios_version
8DET42WW (1.12 )

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