linux-kernel - Re: Question about fixed-clock

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Message-ID: <20130312184033.GK19942@opensource.wolfsonmicro.com>
Date:	Tue, 12 Mar 2013 18:40:33 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Daniel Mack <zonque@...il.com>
Cc:	Afzal Mohammed <afzal.mohd.ma@...il.com>,
	Fabio Estevam <festevam@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Mike Turquette <mturquette@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <robherring2@...il.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Subject: Re: Question about fixed-clock

On Fri, Mar 08, 2013 at 02:30:27PM +0100, Daniel Mack wrote:
> On 08.03.2013 03:15, Mark Brown wrote:

> > Wouldn't this just be set up by the DT in the same way that other
> > off-SoC hardware is?

> Well,  I thought so too. To repeat, in my DT, I have:

OK, I got CCed in part way through the thread.

> I would have expected that "fixed-clock" is matched by a driver lurking
> around for DT boards, just like what the "fixed-regulator" driver does
> for instance. But the clock device isn't initialized unless board code
> explicitly calls of_clk_init() with a table mentioning "fixed-clock", as
> in my patch.

> I don't know the clock framework well enough, but it seems that either
> all DT boards are supposed to do the same in their generic bits (which
> sounds like a lot of code duplication), or the fixed-clock driver should
> behave like any other driver wrt its probing from DT. I'm open to
> suggestions :)

Your expectation sounds like what I'd expect too...

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