linux-kernel - Re: [PATCH v5 0/3] powernv,cpufreq: Dynamic Frequency Scaling support

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Message-ID: <CAKohpo=jvswNPmUPEbS79bSp9ZWC1e3DjaEUX=O4CWMXfufHrw@mail.gmail.com>
Date:	Mon, 31 Mar 2014 09:55:40 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	"Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linuxppc-dev@...abs.org" <linuxppc-dev@...abs.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Anton Blanchard <anton@...ba.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 0/3] powernv,cpufreq: Dynamic Frequency Scaling support

On 29 March 2014 01:41, Gautham R. Shenoy <ego@...ux.vnet.ibm.com> wrote:
> From: "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
>
> Hi,
>
> This is v5 of the patchset to enable dynamic frequency scaling on IBM
> PowerNV platforms. This patchset does address all the review comments
> obtained for v4 (which can be found at [1]).
>
> Changes from v4:
>
>     * Created a separate patch to select the CPUFreq related Config
>       options for PowerNV
>
>     * Dropped the per-core locking hunks in
>       drivers/cpufreq/powernv-cpufreq.c since the CPUFreq core takes
>       care of the for us after the following commit which is present in
>       linux-next:
>
>         commit 12478cf0c55e5969f740bb38a24b1a0104ae18d8
>         Author: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
>         Date:   Mon Mar 24 13:35:44 2014 +0530
>
>         cpufreq: Make sure frequency transitions are serialized
>
>     * [PATCH v5 3/3] gets rid of the powernv_pstate_ids[] array that
>       was being used to record the pstate ids. After the following
>       patch it is safe to use cpufreq_frequency_table.driver_data
>       since it is opaque to the cpufreq core:
>
>         From: Viresh Kumar <viresh.kumar@...aro.org>
>         Date: 2014-03-28 13:53:47
>         url: http://marc.info/?l=linux-pm&m=139601416804702&w=2
>
>         cpufreq: create another field .flags in cpufreq_frequency_table
>
> The patchset is based on the commit
> 201544be8c37dffbf069bb5fc9edb5674f8c1754 of the linux-next tree.
>
> While all the patches in the patchset apply cleanly on linux-next,
> [PATCH v5 3/3] requires the Viresh's patch that was mentioned
> above. Otherwise, the frequency corresponding to pstate id -3 will be
> omited while reporting the "scaling_available_frequencies" in sysfs.
>
> [1]: http://marc.info/?l=linux-pm&m=139585297620612&w=2
>
> Gautham R. Shenoy (2):
>   powernv, cpufreq: Select CPUFreq related Kconfig options for powernv

Make this patch 3/3 (Probably Rafael can do this while applying)

>   powernv,cpufreq: Use cpufreq_frequency_table.driver_data to store
>     pstate ids
>
> Vaidyanathan Srinivasan (1):
>   powernv, cpufreq: cpufreq driver for powernv platform

Otherwise,

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