linux-kernel - Re: [PATCH 4/4] net/smsc911x: Provide common clock functionality

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Message-ID: <20121220192441.GC14363@n2100.arm.linux.org.uk>
Date:	Thu, 20 Dec 2012 19:24:42 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Steve Glendinning <steve.glendinning@...well.net>,
	Robert Marklund <robert.marklund@...ricsson.com>,
	linus.walleij@...ricsson.com, arnd@...db.de,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 4/4] net/smsc911x: Provide common clock functionality

On Thu, Dec 20, 2012 at 08:12:08PM +0100, Linus Walleij wrote:
> On Wed, Dec 19, 2012 at 6:19 PM, Lee Jones <lee.jones@...aro.org> wrote:
> 
> > Some platforms provide clocks which require enabling before the
> > SMSC911x chip will power on. This patch uses the new common clk
> > framework to do just that. If no clock is provided, it will just
> > be ignored and the driver will continue to assume that no clock
> > is required for the chip to run successfully.
> >
> > Cc: Steve Glendinning <steve.glendinning@...well.net>
> > Cc: netdev@...r.kernel.org
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> 
> Seems to me like it'll do the trick.
> Acked-by: Linus Walleij <linus.walleij@...aro.org>

This looks fairly dangerous.  What about those platforms which use this
driver, but don't provide a clock for it?

It looks like this will result in those platforms losing their ethernet
support.  There's at least a bunch of the ARM evaluation boards which
make use of this driver...
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