From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757929Ab1GKV2w (ORCPT ); Mon, 11 Jul 2011 17:28:52 -0400 Received: from adelie.canonical.com ([91.189.90.139]:36667 "EHLO adelie.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751489Ab1GKV2t (ORCPT ); Mon, 11 Jul 2011 17:28:49 -0400 From: Manoj Iyer To: linux-kernel@vger.kernel.org Cc: jbarnes@virtuousgeek.org, cjb@laptop.org, matsumur@nts.ricoh.co.jp, linux-pci@vger.kernel.org Subject: [Patch 0/1] mmc: Added quirks for Ricoh 1180:e823 lower base clock frequency Date: Mon, 11 Jul 2011 16:28:34 -0500 Message-Id: <1310419715-13254-1-git-send-email-manoj.iyer@canonical.com> X-Mailer: git-send-email 1.7.4.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ricoh 1180:e823 does not recognize certain types of SD/MMC cards. - Buffalo SD 512MB dmesg: I/O error, dev mmcblk0, sector xxx - Kingston SD 2GB dmesg: I/O error, dev mmcblk0, sector xxx - Patriot Micro SDHC dmesg: I/O error, dev mmcblk0, sector xxx. Lowering the SD base clock frequency from 200Mhz to 50Mhz fixes this issue. This solution was suggest by Koji Matsumuro, Ricoh Company,Ltd. The patch was tested on Toshiba Tecra R850 by Daniel Manrique. Details can be found in: http://launchpad.net/bugs/773524