linux-kernel - Re: [PATCH v7 1/3] Documentation: common clk API

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Message-ID: <20120322004258.GG16389@n2100.arm.linux.org.uk>
Date:	Thu, 22 Mar 2012 00:42:58 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Saravana Kannan <skannan@...eaurora.org>
Cc:	Tony Lindgren <tony@...mide.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Paul Walmsley <paul@...an.com>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel@...ts.infradead.org,
	Amit Kucheria <amit.kucheria@...aro.org>,
	linaro-dev@...ts.linaro.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	Mike Turquette <mturquette@...com>,
	Mike Turquette <mturquette@...aro.org>,
	Magnus Damm <magnus.damm@...il.com>,
	Deepak Saxena <dsaxena@...aro.org>, patches@...aro.org,
	Rob Herring <rob.herring@...xeda.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Richard Zhao <richard.zhao@...aro.org>,
	Shawn Guo <shawn.guo@...escale.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 1/3] Documentation: common clk API

On Wed, Mar 21, 2012 at 12:41:41PM -0700, Saravana Kannan wrote:
> The meaning of clk_enable/disable has been changed and they won't work  
> without calling clk_prepare/unprepare. So, these are definitely new  
> APIs. If it weren't new APIs, then none of the general drivers would  
> need to change.

Yes and no.  I disagree that the meaning of clk_enable/disable() has
changed.  It hasn't.  What has changed is the preconditions for calling
those functions, and necessarily so in the interest of being able to
unify the different implementations.
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