linux-kernel - Re: [PATCH 2/2] clk: Move init fields from clk to clk

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Message-ID: <20120320181441.GO3852@pengutronix.de>
Date:	Tue, 20 Mar 2012 19:14:41 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Saravana Kannan <skannan@...eaurora.org>
Cc:	Shawn Guo <shawn.guo@...aro.org>,
	Mike Turquette <mturquette@...aro.org>,
	Arnd Bergman <arnd.bergmann@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
	Rob Herring <rob.herring@...xeda.com>,
	Russell King <linux@....linux.org.uk>,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Walmsley <paul@...an.com>,
	Shawn Guo <shawn.guo@...escale.com>,
	Jamie Iles <jamie@...ieiles.com>,
	Richard Zhao <richard.zhao@...aro.org>,
	Magnus Damm <magnus.damm@...il.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Amit Kucheria <amit.kucheria@...aro.org>,
	Deepak Saxena <dsaxena@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCH 2/2] clk: Move init fields from clk to clk_hw

On Tue, Mar 20, 2012 at 03:17:10AM -0700, Saravana Kannan wrote:
> 
> On Tue, March 20, 2012 2:40 am, Sascha Hauer wrote:
> > On Tue, Mar 20, 2012 at 12:54:55AM -0700, Saravana Kannan wrote:
> >>
> > I am using these functions and don't need a static array, I just call
> > the functions with the desired parameters.
> 
> Sure, then let's leave it in. Curious, where do you get the desired
> parameters from? Is it static date in code or is it from DT? You somehow
> probe it?

It's not from DT. See this thread:

http://www.spinics.net/lists/arm-kernel/msg165839.html

> 
> > Overall the clock framework was written in a way that we have to expose
> > as little information about the internally used structs as necessary. It
> > seems your patches are pulling in the opposite direction now.
> 
> I'm not exposing anything that you don't already pass from the platform
> driver. Also, you realize that this is very similar to what you suggested
> with clk_initializer right? If there is a strong push, we can make a copy
> of these inside the struct clk, but for these few init fields I don't see
> a point (see earlier email).

The difference is that a struct clk_initializer is only used to
initialize a clock and not actively used by the clock framework. But as
you already mentioned using a copy inside the clock framework has the
same effect.

Sascha

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