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From: Tony Lindgren <tony@atomide.com>
To: Felipe Balbi <balbi@ti.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>, Chris Ball <cjb@laptop.org>,
	linux-mmc@vger.kernel.org, linux-omap@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: Regression for non-eMMC cards with commit fa550189?
Date: Tue, 29 May 2012 06:03:13 -0700	[thread overview]
Message-ID: <20120529130312.GE12766@atomide.com> (raw)
In-Reply-To: <20120529125024.GM9577@arwen.pp.htv.fi>

* Felipe Balbi <balbi@ti.com> [120529 05:56]:
> Hi,
> 
> On Tue, May 29, 2012 at 05:47:32AM -0700, Tony Lindgren wrote:
> > * Felipe Balbi <balbi@ti.com> [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

WARNING: multiple messages have this Message-ID (diff)
From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: Regression for non-eMMC cards with commit fa550189?
Date: Tue, 29 May 2012 06:03:13 -0700	[thread overview]
Message-ID: <20120529130312.GE12766@atomide.com> (raw)
In-Reply-To: <20120529125024.GM9577@arwen.pp.htv.fi>

* Felipe Balbi <balbi@ti.com> [120529 05:56]:
> Hi,
> 
> On Tue, May 29, 2012 at 05:47:32AM -0700, Tony Lindgren wrote:
> > * Felipe Balbi <balbi@ti.com> [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

  reply	other threads:[~2012-05-29 13:03 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-28 13:21 Regression for non-eMMC cards with commit fa550189? Tony Lindgren
2012-05-28 13:21 ` Tony Lindgren
2012-05-29  6:52 ` Ulf Hansson
2012-05-29  6:52   ` Ulf Hansson
2012-05-29  7:40   ` Felipe Balbi
2012-05-29  7:40     ` Felipe Balbi
2012-05-29 12:47     ` Tony Lindgren
2012-05-29 12:47       ` Tony Lindgren
2012-05-29 12:50       ` Felipe Balbi
2012-05-29 12:50         ` Felipe Balbi
2012-05-29 13:03         ` Tony Lindgren [this message]
2012-05-29 13:03           ` Tony Lindgren
2012-05-30  7:13           ` [PATCH] mmc: omap: Fix broken reg_shift initialization Tony Lindgren
2012-05-30  7:13             ` Tony Lindgren
2012-06-06 13:48             ` Chris Ball
2012-06-06 13:48               ` Chris Ball

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