linux-kernel - Re: [PATCH] arm: omap4: pandaboard: turn on PHY reference clock at init

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Message-ID: <20110110191201.GG4957@atomide.com>
Date:	Mon, 10 Jan 2011 11:12:01 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Paul Walmsley <paul@...an.com>
Cc:	Anand Gadiyar <gadiyar@...com>, linux-omap@...r.kernel.org,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Greg KH <gregkh@...e.de>, Felipe Balbi <balbi@...com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Benoit Cousson <b-cousson@...com>
Subject: Re: [PATCH] arm: omap4: pandaboard: turn on PHY reference clock at
 init

* Paul Walmsley <paul@...an.com> [110110 10:51]:
> On Mon, 10 Jan 2011, Anand Gadiyar wrote:
> 
> > The SMSC 3320 USB PHY on the OMAP4 Pandaboard needs a 19.2 MHz
> > reference clock. This clock is provided from the OMAP4's fref_clk3
> > pad.
> > 
> > Recent changes to clock44xx_data.c made the clock framework aware
> > of the existence of these fref_clk[i] lines. If the option
> > CONFIG_OMAP_RESET_CLOCKS is enabled in the kernel, then the
> > clock framework will turn these clocks off during bootup.
> > 
> > Explicitly request and keep this clock enabled at init for the
> > Pandaboard, so that the PHY receives this clock at all times.
> > 
> > Reported-by: Ming Lei <tom.leiming@...il.com>
> > Signed-off-by: Anand Gadiyar <gadiyar@...com>
> > Cc: Benoit Cousson <b-cousson@...com>
> > Cc: Paul Walmsley <paul@...an.com>
> > Cc: Tony Lindgren <tony@...mide.com>
> 
> Reviewed-by: Paul Walmsley <paul@...an.com>

Will queue as a fix.

Tony
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