From: bilhuang <bilhuang@nvidia.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Stephen Warren <swarren@wwwdotorg.org>,
"thierry.reding@gmail.com" <thierry.reding@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"cpufreq@vger.kernel.org" <cpufreq@vger.kernel.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>
Subject: Re: [PATCH v3 2/2] cpufreq: tegra: Re-model Tegra cpufreq driver
Date: Wed, 18 Dec 2013 19:33:09 +0800 [thread overview]
Message-ID: <52B187F5.7020105@nvidia.com> (raw)
In-Reply-To: <CAKohpom0n8P8goQnsgBnWJwyqCVv_FRX3xKvO1yFW0VUMpMW8w@mail.gmail.com>
On 12/18/2013 07:11 PM, Viresh Kumar wrote:
> On 17 December 2013 16:22, bilhuang <bilhuang@nvidia.com> wrote:
>> Tegra20 DVFS is a little bit complicated due to the fact that we can't scale
>> VDD_CPU directly, there are constraints or relationship to other power rails
>> so I don't think it is a good idea to use generic cpufreq-cpu0 driver if
>> we're going to support voltage scaling.
>
> But why can't we handle that in a CPU specific regulator code?
>
cpufreq-cpu0 driver will call regulator_set_voltage_tol() directly
according to the pre-defined OPP freq/volt pairs, the regulator drivers
could be shared by other SoC so is not suitable to handle this, or do I
misunderstand?
next prev parent reply other threads:[~2013-12-18 11:33 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-05 7:44 [PATCH v3 0/2] Remodel Tegra cpufreq drivers to support Tegra series SoC Bill Huang
2013-12-05 7:44 ` [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code Bill Huang
2013-12-05 22:54 ` Stephen Warren
2013-12-09 8:41 ` bilhuang
2013-12-17 6:31 ` Viresh Kumar
2013-12-17 10:48 ` bilhuang
2013-12-05 7:44 ` [PATCH v3 2/2] cpufreq: tegra: Re-model Tegra cpufreq driver Bill Huang
2013-12-05 23:04 ` Stephen Warren
2013-12-09 8:44 ` bilhuang
2013-12-09 17:32 ` Stephen Warren
2013-12-11 11:18 ` bilhuang
2013-12-11 18:39 ` Stephen Warren
2013-12-17 6:54 ` Viresh Kumar
2013-12-17 10:52 ` bilhuang
2013-12-18 11:11 ` Viresh Kumar
2013-12-18 11:33 ` bilhuang [this message]
2013-12-18 14:39 ` Viresh Kumar
2013-12-19 5:26 ` bilhuang
2013-12-19 5:29 ` Viresh Kumar
2013-12-19 5:57 ` bilhuang
2013-12-17 6:26 ` [PATCH v3 0/2] Remodel Tegra cpufreq drivers to support Tegra series SoC Viresh Kumar
2013-12-17 10:47 ` bilhuang
2013-12-17 10:51 ` Viresh Kumar
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