linux-kernel - Re: [PATCH] PM / OPP: discard duplicate OPP additions

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Date:	Tue, 13 May 2014 11:30:13 +0100
From:	Sudeep Holla <sudeep.holla@....com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	"[Chander Kashyap" <chander.kashyap@...aro.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Pavel Machek <pavel@....cz>,
	"Brown, Len" <len.brown@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Chander Kashyap <k.chander@...sung.com>,
	Inderpal Singh <inderpal.s@...sung.com>,
	Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH] PM / OPP: discard duplicate OPP additions

On Tue, May 13, 2014 at 9:22 AM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> On 13 May 2014 13:11, [Chander Kashyap <chander.kashyap@...aro.org> wrote:
>
> What happened to your name ? "["
>
>> From: Chander Kashyap <k.chander@...sung.com>
>>
>> It may be possible to unregister and re-register the cpufreq driver.
>> One such example is arm big-little IKS cpufreq driver. While
>> re-registering the driver, same OPPs may get added again.
>>
>> This patch detects the duplicacy and discards them.
>>
>> Signed-off-by: Chander Kashyap <k.chander@...sung.com>
>> Signed-off-by: Inderpal Singh <inderpal.s@...sung.com>
>> ---
>>  drivers/base/power/opp.c |   28 +++++++++++++++++++---------
>>  1 file changed, 19 insertions(+), 9 deletions(-)
>
> I wouldn't say that this approach is particularly bad or wrong, but what
> about this instead?
>

Yes I prefer this and this exactly what I had[1] in my OPP DT series which
we could not conclude on the bindings. You also need patch[2] for DT version.

Regards,
Sudeep

[1] http://www.spinics.net/lists/cpufreq/msg07914.html
[2] http://www.spinics.net/lists/cpufreq/msg07916.html
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