linux-kernel - Re: [PATCH v3 3/5] clk: introduce the common clock framework

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Message-ID: <20111201183211.GC18120@opensource.wolfsonmicro.com>
Date:	Thu, 1 Dec 2011 18:32:11 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Paul Walmsley <paul@...an.com>
Cc:	"Turquette, Mike" <mturquette@...com>, linux@....linux.org.uk,
	linus.walleij@...ricsson.com, patches@...aro.org,
	shawn.guo@...escale.com, magnus.damm@...il.com,
	linux-kernel@...r.kernel.org, amit.kucheria@...aro.org,
	richard.zhao@...aro.org, grant.likely@...retlab.ca,
	dsaxena@...aro.org, eric.miao@...aro.org, sboyd@...cinc.com,
	skannan@...cinc.com, linaro-dev@...ts.linaro.org,
	jeremy.kerr@...onical.com, linux-omap@...r.kernel.org,
	tglx@...utronix.de, linux-arm-kernel@...ts.infradead.org,
	arnd.bergmann@...aro.org
Subject: Re: [PATCH v3 3/5] clk: introduce the common clock framework

On Thu, Dec 01, 2011 at 11:30:16AM -0700, Paul Walmsley wrote:

> So for example, if you had a driver that did:

> c = clk_get(dev, clk_name);
> clk_enable(c);
> clk_set_rate(c, clk_rate);

> and c was currently not enabled by any other driver on the system, and 
> nothing else had called clk_block_rate_change(c), then the rate change 
> would be allowed to proceed.  (modulo any notifier activity, etc.)  

> So clk_{allow,block}_rate_change() was simply intended to allow or 
> restrict other users of the same clock, not the current user.

Ah, sorry!  I'd totally misunderstood what you were proposing.
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