linux-kernel - Re: [PATCH v3 0/4] DT clock bindings

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Date:	Thu, 21 Jun 2012 10:54:43 -0700
From:	Mike Turquette <mturquette@...com>
To:	Rob Herring <robherring2@...il.com>
Cc:	Chris Ball <cjb@...top.org>, Mitch Bradley <wmb@...top.org>,
	mturquette@...aro.org, Arnd Bergmann <arnd@...db.de>,
	devicetree-discuss@...ts.ozlabs.org, sboyd@...eaurora.org,
	linux-kernel@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	skannan@...eaurora.org, Olof Johansson <olof@...om.net>,
	shawn.guo@...aro.org, s.hauer@...gutronix.de,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 0/4] DT clock bindings

On 20120621-10:00, Rob Herring wrote:
> On 06/21/2012 02:27 AM, Chris Ball wrote:
> > 
> > 2) Use alloc_bootmem() instead of kzalloc() in of_clk_add_provider(),
> >    because we need to set up clocks during .init_early on ARM (which
> >    happens pre-slab) so that they are available for platform init.
> 
> This depends on 1 as the common clock code would have the same issue.
> Generally, the first place clocks are needed is the timer init. At that
> point, you can call kzalloc. This is where all the clock init used to be
> done until init_early was added and some platforms have moved their
> clock init. I don't think there was really ever much reason to move it
> other than to make the timer init function only deal with timer setup.
> 

Hi Rob,

Just FYI I've been looking at using alloc_bootmem in the common clk code
as a way to get rid of the static initialization stuff (which only
existed due to very early initialization of timers).

The suggested change above to of_clk_add_provider would jive well with
my change to the common clk code.

Regards,
Mike
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