linux-kernel - Re: [PATCH v4 13/16] cpufreq: Add cpufreq driver for Tegra124

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Message-ID: <CAKohpo=rwM7Gju83heSzhw02J+FP1Jv2zdABZGsXFTF8KH=oEw@mail.gmail.com>
Date:	Thu, 21 Aug 2014 10:39:41 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Tuomas Tynkkynen <ttynkkynen@...dia.com>
Cc:	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Mike Turquette <mturquette@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Paul Walmsley <pwalmsley@...dia.com>,
	Vince Hsu <vinceh@...dia.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v4 13/16] cpufreq: Add cpufreq driver for Tegra124

On 21 August 2014 02:34, Tuomas Tynkkynen <ttynkkynen@...dia.com> wrote:
> Add a new cpufreq driver for Tegra124. Instead of using the PLLX as
> the CPU clocksource, switch immediately to the DFLL. It allows the use
> of higher clock rates, and will automatically scale the CPU voltage as
> well. Besides the CPU clocksource switch, we let the cpufreq-cpu0 driver
> for all the cpufreq operations.
>
> This driver also relies on the DFLL driver to fill the OPP table for the
> CPU0 device, so that the cpufreq-cpu0 driver knows what frequencies to
> use.
>
> Signed-off-by: Tuomas Tynkkynen <ttynkkynen@...dia.com>
> ---
> v4:
>  - check for get_cpu_device() return value
>  - add comment why an extra platform driver+device is required
>  - back to 'depends on GENERIC_CPUFREQ_CPU0'

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
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