linux-kernel - Re: [RFC PATCH 2/5] clk: Introduce 'clk_round_rate

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Message-ID: <CAKohpomb+h6ZNDgJ8AwJ_J9DjMB7AP_v-cp8coG3CACo5Wt4vQ@mail.gmail.com>
Date:	Mon, 26 May 2014 11:59:09 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Sören Brinkmann <soren.brinkmann@...inx.com>
Cc:	Mike Turquette <mturquette@...aro.org>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Russell King <linux@....linux.org.uk>,
	Stephen Boyd <sboyd@...eaurora.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Michal Simek <michal.simek@...inx.com>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH 2/5] clk: Introduce 'clk_round_rate_nearest()'

On 23 May 2014 21:44, Sören Brinkmann <soren.brinkmann@...inx.com> wrote:
> Viresh: Could you imagine something similar for cpufreq? You suggested
> migrating to Hz resolution. I guess that would ideally mean to follow
> the CCF to a 64-bit type for frequencies and increasing the resolution.
> I have a messy patch migrating cpufreq and OPP to Hz and unsigned long
> that works on Zynq. But cpufreq has so many users that it would become
> quite an undertaking.
> And we'd need some new/amended OPP DT binding.

If we are going to migrate to Hz from KHz, I think we must consider the
64 bit stuff right now, otherwise it will bite us later.

@Rafael: What do you think?
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