linux-kernel - Re: Locking in the clk API

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Date:	Fri, 21 Jan 2011 09:31:04 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Saravana Kannan <skannan@...eaurora.org>
Cc:	Ben Dooks <ben-linux@...ff.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	linux-sh@...r.kernel.org,
	Ben Herrenschmidt <benh@...nel.crashing.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	linux-kernel@...r.kernel.org, Paul Mundt <lethal@...ux-sh.org>,
	Uwe Kleine-K??nig <u.kleine-koenig@...gutronix.de>,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: Locking in the clk API

On Thu, Jan 20, 2011 at 07:43:23PM -0800, Saravana Kannan wrote:
> On 01/20/2011 10:57 AM, Russell King - ARM Linux wrote:
>> On Thu, Jan 20, 2011 at 04:32:44PM +0000, Ben Dooks wrote:
>>> I would vote for all clk lookup and reference counting code be made
>>> sleep-able and define it as such.
>>
>> Always has been and probably always will be.
>>
>
> clk_enable/disable APIs have refcounting and they certainly aren't  
> sleep-able. I'm not sure if that's what Ben meant though.

Ben's talking about clk_get/clk_put.  See "clk lookup" in his sentence.
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