On Wed, 14 Oct 2009 09:56:28 +0200 Ohad Ben-Cohen <o...@wizery.com> wrote:
> On Tue, Oct 13, 2009 at 4:39 AM, Philip Langdale <phil...@overt.org> wrote: > > 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. > > 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. > > 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) ? > 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 -- -- 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.
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