From: Josh Boyer <jwboyer@redhat.com>
To: Manoj Iyer <manoj.iyer@canonical.com>
Cc: Chris Ball <cjb@laptop.org>,
Koji Matsumuro <matsumur@nts.ricoh.co.jp>,
Jesse Barnes <jbarnes@virtuousgeek.org>,
stable@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mmc: Always check for lower base frequency quirk for Ricoh 1180:e823
Date: Wed, 5 Oct 2011 12:43:06 -0400 [thread overview]
Message-ID: <20111005164306.GC2479@zod.bos.redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1110051059550.3478@sleepy>
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 )
josh
next prev parent reply other threads:[~2011-10-05 16:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-05 15:44 [PATCH] mmc: Always check for lower base frequency quirk for Ricoh 1180:e823 Josh Boyer
2011-10-05 16:27 ` Manoj Iyer
2011-10-05 16:43 ` Josh Boyer [this message]
2011-10-05 18:19 ` Manoj Iyer
2011-10-14 16:07 ` Jesse Barnes
2011-10-14 16:24 ` Josh Boyer
2011-11-01 18:47 ` Greg KH
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