From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: Regression for non-eMMC cards with commit fa550189? Date: Tue, 29 May 2012 06:03:13 -0700 Message-ID: <20120529130312.GE12766@atomide.com> References: <20120528132147.GC12766@atomide.com> <20120529074047.GE16340@arwen.pp.htv.fi> <20120529124732.GD12766@atomide.com> <20120529125024.GM9577@arwen.pp.htv.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mho-02-ewr.mailhop.org ([204.13.248.72]:13530 "EHLO mho-02-ewr.mailhop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751758Ab2E2NDS (ORCPT ); Tue, 29 May 2012 09:03:18 -0400 Content-Disposition: inline In-Reply-To: <20120529125024.GM9577@arwen.pp.htv.fi> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Felipe Balbi Cc: Ulf Hansson , Chris Ball , linux-mmc@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org * Felipe Balbi [120529 05:56]: > Hi, > > On Tue, May 29, 2012 at 05:47:32AM -0700, Tony Lindgren wrote: > > * Felipe Balbi [120529 00:46]: > > > > > > Can you enable debugging on menelaus so we see what the driver is doing ? > > > > > > I believe that to change the VMMC's supply voltage you need to turn off > > > the regulator, meaning LDO_CTRL7[1:0] = 0b00. > > > > Looks like it's some kind of race between the slots that now gets triggered > > in the omap driver. > > > > Commenting out the second slot in the board file fixes things. I tried adding > > a mutex to protect the sequence between POWER_UP and POWER_ON, but no luck yet. > > > > Also adding printk statements here and there makes it work again. > > does this help ? Thanks does not seem to help. Tony