linux-kernel - Re: [PATCH v3 5/7] clk: sunxi: add PRCM (Power/Reset/Clock Management) clks support

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Date:	Wed, 14 May 2014 09:30:59 +0200
From:	Boris BREZILLON <boris.brezillon@...e-electrons.com>
To:	Mike Turquette <mturquette@...aro.org>,
	Emilio López <emilio@...pez.com.ar>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>
CC:	Chen-Yu Tsai <wens@...e.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Shuge <shuge@...winnertech.com>, kevin@...winnertech.com,
	Hans de Goede <hdegoede@...hat.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	dev@...ux-sunxi.org
Subject: Re: [PATCH v3 5/7] clk: sunxi: add PRCM (Power/Reset/Clock Management)
 clks support

Hello Mike,

On 14/05/2014 02:51, Mike Turquette wrote:
> Quoting Boris BREZILLON (2014-05-09 04:11:49)
>> +struct clk_ops ar100_ops = {
>> +       .recalc_rate = ar100_recalc_rate,
>> +       .determine_rate = ar100_determine_rate,
>> +       .set_parent = ar100_set_parent,
>> +       .get_parent = ar100_get_parent,
>> +       .set_rate = ar100_set_rate,
>> +};
> I might be having a brain fart, but is there a valid case for having
> both a .recalc_rate and a .determine_rate? I believe that the former
> will never be used and the latter will always be used by the clock
> framework core.

I think you're mistaking recalc_rate for round_rate.
AFAIK, recalc_rate is mandatory for a clk that implement either
round_rate or determine_rate.


Best Regards,

Boris

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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