From: carlo@caione.org (Carlo Caione)
Date: Tue, 11 Mar 2014 20:24:11 +0100
Subject: [linux-sunxi] Re: [PATCH 6/7] regulator: AXP20x: Add support for
 regulators subsystem
In-Reply-To: <20140303015616.GN2411@sirena.org.uk>
References: <1393692352-10839-1-git-send-email-carlo@caione.org>
 <1393692352-10839-7-git-send-email-carlo@caione.org>
 <20140303015616.GN2411@sirena.org.uk>
Message-ID: <20140311192411.GA4193@localhost.fastwebnet.it>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Mon, Mar 03, 2014 at 10:56:16AM +0900, Mark Brown wrote:

<snip>
 
> > +	np = of_node_get(pdev->dev.parent->of_node);
> > +	if (!np)
> > +		return 0;
> > +
> > +	regulators = of_find_node_by_name(np, "regulators");
> > +	if (!regulators) {
> > +		dev_err(&pdev->dev, "regulators node not found\n");
> > +		return -EINVAL;
> > +	}
> 
> The driver should be able to start up with no configuration provided at
> all except for the device being registered - the user won't be able to
> change anything but they will be able to read the current state of the
> hardware which can be useful for diagnostics.

If the device is DT enabled and no configuration is provided for
regulators, these are disabled according to:

http://lxr.linux.no/linux+v3.13.5/drivers/regulator/core.c#L3797

Am I missing something or do you have any pointer?

Thanks,

-- 
Carlo Caione