netdev - Re: [PATCH 2/2 v3] net/smsc911x: Add regulator support

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Message-ID: <20111027214241.GA11534@opensource.wolfsonmicro.com>
Date:	Thu, 27 Oct 2011 23:42:41 +0200
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Mike Frysinger <vapier@...too.org>
Cc:	Linus Walleij <linus.walleij@...ricsson.com>,
	netdev@...r.kernel.org,
	Steve Glendinning <steve.glendinning@...c.com>,
	Mathieu Poirer <mathieu.poirier@...aro.org>,
	Robert Marklund <robert.marklund@...ricsson.com>,
	Paul Mundt <lethal@...ux-sh.org>, linux-sh@...r.kernel.org,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
	uclinux-dist-devel@...ckfin.uclinux.org,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 2/2 v3] net/smsc911x: Add regulator support

On Thu, Oct 27, 2011 at 10:59:14PM +0200, Mike Frysinger wrote:

> i saw that !CONFIG_REGULATOR works great.  my concern is that these
> boards don't define any regulators for smsc resources, so if
> CONFIG_REGULATOR is enabled to test out unrelated daughter cards, i
> don't want the network driver suddenly failing.  Linus' comments
> suggest that this is what would happen unless each board file has its
> smsc platform resources extended.  maybe i misunderstood what he was saying ?

That's the case that's handled by CONFIG_REGULATOR_DUMMY - if the lookup
fails the core will provide a virtual regulator to the consumer.  If
you're running a setup like that you probably want to enable dummy
regulators anyway.
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