Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752287Ab0ABXiM (ORCPT ); Sat, 2 Jan 2010 18:38:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751657Ab0ABXiK (ORCPT ); Sat, 2 Jan 2010 18:38:10 -0500 Received: from 82-117-125-11.tcdsl.calypso.net ([82.117.125.11]:35565 "EHLO smtp.ossman.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751162Ab0ABXiJ (ORCPT ); Sat, 2 Jan 2010 18:38:09 -0500 Date: Sun, 3 Jan 2010 00:38:04 +0100 From: Pierre Ossman To: Ben Nizette Cc: Hein_Tibosch , Sascha Hauer , Adrian Hunter , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Matt Fleming Subject: Re: [PATCH v3] mmc: Make ID freq configurable Message-ID: <20100103003804.66021fe9@mjolnir.ossman.eu> In-Reply-To: References: <1246492196.2980.17.camel@linux-51e8.site> <20090702135849.21370282@hskinnemoen-d830> <1246537056.2980.60.camel@linux-51e8.site> <4B3E570C.2060602@yahoo.es> <63809451-ED1D-487A-AE63-F72B23D136D8@niasdigital.com> <4B3F019F.6010306@yahoo.es> <49985427-DCB9-40E1-815B-43C812B41DE3@niasdigital.com> <20100102130809.121b7e10@mjolnir.ossman.eu> X-Mailer: Claws Mail 3.7.3 (GTK+ 2.18.5; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; protocol="application/pgp-signature"; boundary="=_freyr.ossman.eu-31714-1262475490-0001-2" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2301 Lines: 65 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-31714-1262475490-0001-2 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Sun, 3 Jan 2010 09:23:30 +1100 Ben Nizette wrote: > >=20 > > Broken cards seem to be all over the spectrum, so I wouldn't be > > suprised if you find ones that break if you go too low as well. >=20 > Yea good point, though given there might not even be a One Freq to Rule T= hem All, how about: >=20 > ---8<--- >=20 > From: Ben Nizette > Subject: [PATCH v3] mmc: Make ID freq configurable >=20 > While the SD spec specifies a range of frequencies for the ID phase from = 100-400kHz, not all cards play by the rules. This patch adds a Kconfig opt= ion to allow the user to tweak this to their card/host config, though the d= efault of 250kHz should be fine for all spec-abiding cards and most others = besides. >=20 > Signed-off-by: Ben Nizette >=20 This is not a good solution. We all use the same pool of cards so we should all be using the same init sequence. If there isn't a single frequency where all cards will work, then we'll have to make something more advanced where the kernel will try the init several times with different clocking. Rgds --=20 -- Pierre Ossman WARNING: This correspondence is being monitored by FRA, a Swedish intelligence agency. Make sure your server uses encryption for SMTP traffic and consider using PGP for end-to-end encryption. --=_freyr.ossman.eu-31714-1262475490-0001-2 Content-Type: application/pgp-signature; name="signature.asc" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (GNU/Linux) iEYEARECAAYFAks/2N4ACgkQ7b8eESbyJLgKQACfa+JDwY97aaPlgxQ4bYVU+WaW 5mEAoOECi8nNIlbrq9aiHzQRj9prTFKu =xxzx -----END PGP SIGNATURE----- --=_freyr.ossman.eu-31714-1262475490-0001-2-- -- 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/