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: Wed, 14 Oct 2009 10:48:49 +0200 Message-ID: <20091014104849.3c441249@mjolnir.ossman.eu> References: <1254160269.10634.15.camel@localhost> <20090928192548.11da5c3c@fido2.homeip.net> <20090929202833.179fb521@mjolnir.ossman.eu> <20090929233732.62f470e0@mjolnir.ossman.eu> <20090929231013.5d67b36a@fido2.homeip.net> <20091008203826.5e027347@mjolnir.ossman.eu> <20091010114215.5f9d8c94@fido2.homeip.net> <4AD32B01.5000600@csr.com> <20091012193952.1482e322@fido2.homeip.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; protocol="application/pgp-signature"; boundary="=_freyr.ossman.eu-31059-1255510135-0001-2" Return-path: Received: from 82-117-125-11.tcdsl.calypso.net ([82.117.125.11]:59045 "EHLO smtp.ossman.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751843AbZJNItb (ORCPT ); Wed, 14 Oct 2009 04:49:31 -0400 In-Reply-To: Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Ohad Ben-Cohen Cc: Philip Langdale , David Vrabel , akpm@linux-foundation.org, 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-31059-1255510135-0001-2 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 14 Oct 2009 09:56:28 +0200 Ohad Ben-Cohen wrote: > On Tue, Oct 13, 2009 at 4:39 AM, Philip Langdale wrot= e: > > Interesting. But that means that Ohad's patch doesn't make much sense; > > his uses the MMC low voltage OCR bit in an SDIO context. So either, the > > patch is wrong, or he's dealing with out-of-spec hardware. >=20 > Yes, the hardware is out-of-spec. It uses the undefined low voltage > OCR bit to achieve 1.8V SDIO voltage. By removing the MMC_VDD_165_195 > restriction, commit 27cce39f555def6f5ebe7f03d69ccc44ab25f0b2 makes it > possible for the hardware to work with unpatched kernels. >=20 > Philip, David, Pierre - would you like to remove the MMC_VDD_165_195 > restriction differently ? maybe to revive the MMC_CAP_VDD_165_195 host > capability patch in some way (see > http://www.mail-archive.com/linux-mmc@vger.kernel.org/msg00386.html) ? >=20 Since this is out-of-spec and therefore possibly dangerous behaviour, I'd like it to be opt-in for the user. And since it's so early in the init process, we can't automate it based on card id. 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-31059-1255510135-0001-2 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) iEYEARECAAYFAkrVkHMACgkQ7b8eESbyJLgNRwCgsG0ThNzAcaOy6XbWfKlv2evE KxMAoNbf+pGCjs0xBwvhwjK9NTstKtqm =WU3Y -----END PGP SIGNATURE----- --=_freyr.ossman.eu-31059-1255510135-0001-2--