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 05:47:32 -0700 [thread overview]
Message-ID: <20120529124732.GD12766@atomide.com> (raw)
In-Reply-To: <20120529074047.GE16340@arwen.pp.htv.fi>
* 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.
Regards,
Tony
next prev parent reply other threads:[~2012-05-29 12:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-28 13:21 Regression for non-eMMC cards with commit fa550189? Tony Lindgren
2012-05-29 6:52 ` Ulf Hansson
2012-05-29 7:40 ` Felipe Balbi
2012-05-29 12:47 ` Tony Lindgren [this message]
2012-05-29 12:50 ` Felipe Balbi
2012-05-29 13:03 ` Tony Lindgren
2012-05-30 7:13 ` [PATCH] mmc: omap: Fix broken reg_shift initialization Tony Lindgren
2012-06-06 13:48 ` Chris Ball
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