linux-kernel - Re: [PATCH] AB3100 regulator support v1

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Message-ID: <20090830100857.GC4334@sirena.org.uk>
Date:	Sun, 30 Aug 2009 11:08:57 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Linus Walleij <linus.ml.walleij@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Liam Girdwood <lrg@...mlogic.co.uk>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.arm.linux.org.uk
Subject: Re: [PATCH] AB3100 regulator support v1

On Sun, Aug 30, 2009 at 02:37:51AM +0200, Linus Walleij wrote:
> 2009/8/30 Linus Walleij <linus.ml.walleij@...il.com>:

> > So this is because I am in the parents probe() function of course,
> > and it's all expected.

> I was curious how wm8350 on MX31 did this while using only subsys_initcalls()
> (wm8400 doesn't look like it's completed yet) and found:

What makes you say that wm8400 is not completed?  If you're looking for
a current example of regulator driver probing the most current regulator
drivers I've merged are the wm831x drivers in -next via the MFD tree.
Though...

> which creates a platform device and sets the parent to
> the struct wm8350->dev. But this is actually the i2c_client dev
> and then it is not so strange that it works nicely to have both
> the 8350 core device as parent and the platform devices as
> children in a subsys_initcall() since the i2c core does not
> use the regular device driver matching scheme, but rolls it's
> own (which does NOT try to take the parent's semaphore...)

...though since the WM8400 and WM831x are I2C/SPI devices too they won't
have this issue.
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