Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756553AbZFVOMA (ORCPT ); Mon, 22 Jun 2009 10:12:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752152AbZFVOLx (ORCPT ); Mon, 22 Jun 2009 10:11:53 -0400 Received: from 82-117-125-11.tcdsl.calypso.net ([82.117.125.11]:36933 "EHLO smtp.ossman.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751732AbZFVOLw (ORCPT ); Mon, 22 Jun 2009 10:11:52 -0400 Date: Mon, 22 Jun 2009 16:11:47 +0200 From: Pierre Ossman To: "J.A. =?UTF-8?B?TWFnYWxsw7Nu?=" Cc: LKML Subject: Re: Speed of SDHCI subsystem Message-ID: <20090622161147.0769731a@mjolnir.ossman.eu> In-Reply-To: <20090617234550.116d7b7e@werewolf.home> References: <20090519003750.461abe7d@werewolf.home> <20090603083341.7a2c84c8@mjolnir.ossman.eu> <20090617234550.116d7b7e@werewolf.home> X-Mailer: Claws Mail 3.7.1 (GTK+ 2.16.2; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; protocol="application/pgp-signature"; boundary="=_freyr.ossman.eu-23028-1245679913-0001-2" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2308 Lines: 67 This is a MIME-formatted message. If you see this text it means that your E-mail software does not support MIME-formatted messages. --=_freyr.ossman.eu-23028-1245679913-0001-2 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Wed, 17 Jun 2009 23:45:50 +0200 "J.A. Magall=C3=B3n" wrote: >=20 > Thanks, now its clear it is related to hardware limits. > I suppose this controler is a cheap one... > Things in the Aspire One are these: >=20 *snip* > 04:00.0 System peripheral: JMicron Technologies, Inc. SD/MMC Host Control= ler > 04:00.2 SD Host controller: JMicron Technologies, Inc. Standard SD Host C= ontroller > 04:00.3 System peripheral: JMicron Technologies, Inc. MS Host Controller > 04:00.4 System peripheral: JMicron Technologies, Inc. xD Host Controller That chip is capable of very high speeds but unfortunately the systems aren't always properly wired for it so the high-speed mode was disabled by default in the chips. You can force it on by applying this patch: http://git.kernel.org/?p=3Dlinux/kernel/git/torvalds/linux-2.6.git;a=3Dcomm= itdiff;h=3Da4b76193774b463b922cab2f92450efb20d29ef0;hp=3Dd6d8de33415ca7598f= e66d933b6556fa8f89afe2 Rgds --=20 -- Pierre Ossman Linux kernel, MMC maintainer http://www.kernel.org rdesktop, core developer http://www.rdesktop.org TigerVNC, core developer http://www.tigervnc.org WARNING: This correspondence is being monitored by the Swedish government. Make sure your server uses encryption for SMTP traffic and consider using PGP for end-to-end encryption. --=_freyr.ossman.eu-23028-1245679913-0001-2 Content-Type: application/pgp-signature; name="signature.asc" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.11 (GNU/Linux) iEYEARECAAYFAko/kScACgkQ7b8eESbyJLhnpQCgx3+O+u9X2l7zTcSjylN3AWBV sloAmwVkczAQKIq3xZ49Be/95pihUzXC =0pLF -----END PGP SIGNATURE----- --=_freyr.ossman.eu-23028-1245679913-0001-2-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/