linux-kernel - Re: 32kHz clock removal causes problems omap

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Message-ID: <20121218095450.GB27751@arwen.pp.htv.fi>
Date:	Tue, 18 Dec 2012 11:54:50 +0200
From:	Felipe Balbi <balbi@...com>
To:	Luciano Coelho <coelho@...com>
CC:	<svenkatr@...com>, <linux-omap@...r.kernel.org>,
	<linux-mmc@...r.kernel.org>, <cjb@...top.org>, <lrg@...com>,
	<broonie@...nsource.wolfsonmicro.com>,
	<linux-kernel@...r.kernel.org>, <balbi@...com>,
	Peter Ujfalusi <peter.ujfalusi@...com>,
	Tony Lindgren <tony@...mide.com>
Subject: Re: 32kHz clock removal causes problems omap_hsmmc

Hi,

On Thu, Nov 15, 2012 at 10:31:33AM +0200, Luciano Coelho wrote:
> Since the 32KHz clock was removed from the twl-regulator (0e8e5c34
> regulator: twl: Remove references to 32kHz clock from DT bindings),
> we've been having problems with our wl12xx chip that is connected
> through the omap_hsmmc.
> 
> Our card simply doesn't get added to the system and we get lots of
> -ETIMEOUTs during mmc_attach.  If I revert 0e8e5c34 (plus a couple of
> associated patches), everything works fine.
> 
> I've been using a Blaze device with a WiLink 1283 chip connected in the
> COM (internal) port.  The funny thing is that I don't have the same
> problem with a WiLink 1853 chip (which is connected externally to
> another Blaze).
> 
> Does anyone know what the problem could and how to fix it?
> 
> This is a regression that has been there since 3.6-rc1.

damn, this is still part of our v3.7-rc kernel. Original commit was done
with no testing whatsoever and caused a big regression to (at least)
TI's WiFi driver which depend on SDIO to function.

Too bad things break and even when reported nobody gives a rat's ***
about them :-s

-- 
balbi

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