From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pierre Ossman Subject: Re: [PATCH] sdio: add MMC_CAP_VDD_165_195 host capability Date: Tue, 29 Sep 2009 23:37:32 +0200 Message-ID: <20090929233732.62f470e0@mjolnir.ossman.eu> References: <1254160269.10634.15.camel@localhost> <4AC0FBF0.6090007@csr.com> <20090928192548.11da5c3c@fido2.homeip.net> <20090929202833.179fb521@mjolnir.ossman.eu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; protocol="application/pgp-signature"; boundary="=_freyr.ossman.eu-1015-1254260257-0001-2" Return-path: Received: from 82-117-125-11.tcdsl.calypso.net ([82.117.125.11]:39091 "EHLO smtp.ossman.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752094AbZI2Vhd (ORCPT ); Tue, 29 Sep 2009 17:37:33 -0400 In-Reply-To: Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Philip Langdale Cc: David Vrabel , Ohad Ben-Cohen , akpm@linux-foundation.org, p , ian@mnementh.co.uk, matt@console-pimps.org, roberto.foglietta@gmail.com, linux-mmc@vger.kernel.org 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-1015-1254260257-0001-2 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 29 Sep 2009 16:20:38 -0400 Philip Langdale wrote: >=20 > My understanding from the previous discussion was that SD 3.0 (and > presumably > a matching SDHCI 3.0) fully define the low voltage range. As such, a > controller > that is documented to conform to this spec, or is otherwise documented to > implement the functionality, can be safely allowed to run SD cards that > also > claim to support the bit. >=20 I must have missed that part of discussion. If the voltage fully overlaps with the MMC definition, then I don't see the controllers having to be designed explicitly for SD 3.0. If not, then we probably need a new voltage bit for the hosts. In that case separating supporting from non-supporting should sort itself out easily. > Yes, there is a danger of pre 3.0 cards claiming to suport the low voltage > range, > but I think there's a credible chance that no such cards actually exist, > and if > they do, I think they're obscure enough to ignore - if they were a proble= m, > the > SD association would have had to abandon using the same bit as MMC uses. >=20 Agreed. Btw, you really need to whip some sense into the line handling of your email client. :) Rgds --=20 -- Pierre Ossman 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-1015-1254260257-0001-2 Content-Type: application/pgp-signature; name="signature.asc" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) iEYEARECAAYFAkrCfh8ACgkQ7b8eESbyJLj4HQCbBVweXsdOowtpuivfLHvuQyqM 08UAoI0E1+nFOObCGrlSD8Yj3xZXhHcv =+dlH -----END PGP SIGNATURE----- --=_freyr.ossman.eu-1015-1254260257-0001-2--