linux-kernel - Re: [PATCH v6 3/3] clk: basic clock hardware types

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Date:	Tue, 13 Mar 2012 11:38:29 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Matt Sealey <matt@...esi-usa.com>
Cc:	Mike Turquette <mturquette@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Andrew Lunn <andrew@...n.ch>, linaro-dev@...ts.linaro.org,
	Saravana Kannan <skannan@...eaurora.org>,
	Jamie Iles <jamie@...ieiles.com>,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	Magnus Damm <magnus.damm@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergman <arnd.bergmann@...aro.org>, patches@...aro.org,
	Rob Herring <rob.herring@...xeda.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Walmsley <paul@...an.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 3/3] clk: basic clock hardware types

On Mon, Mar 12, 2012 at 10:50:09PM -0500, Matt Sealey wrote:
> Hi Mike,
> 
> Can I suggest/we discuss that we support fractional (i.e. represented
> by fixed point value with integer and fractional part) dividers in the
> common divider clock case, simplistically just adding a divider
> fractional width and shifting all the calculations by it (and fixing
> the "maxdiv" calculation as in a fractional case width of the divider
> area in the register is not an indicator of the actual maximum
> divider)? (I guess for the standard integer divider case, it would be
> continually shifting by 0 which might make the code a bit bigger, I
> don't think that would truly be a concern though?)

I have patches for this, see

git://git.pengutronix.de/git/imx/linux-2.6.git imx/work/imx-clkv6

Sascha

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