linux-kernel - Re: Re: [PATCH 6/6] PM / devfreq: Set the min_freq and max

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Message-ID: <CAGTfZH2N-yspxAKCR_sOPz0nSNixADzSFwEe0rhkwHOPFKYyPQ@mail.gmail.com>
Date:	Mon, 23 Nov 2015 17:53:33 +0900
From:	Chanwoo Choi <cwchoi00@...il.com>
To:	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>
Cc:	박경민 <kyungmin.park@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: Re: [PATCH 6/6] PM / devfreq: Set the min_freq and max_freq of
 devfreq device

On Mon, Nov 23, 2015 at 4:21 PM, MyungJoo Ham <myungjoo.ham@...sung.com> wrote:
> []
>> >
>> > The value 0 is used for min/max_freq to declare
>> > that min/max_freq is deactivated. Therefore, it is not
>> > required to do so; they are not intended to show the hardware
>> > configuration as well.
>>
>> This case consider the devfreq device using OPP because devfreq_set_freq_table()
>> get the number of OPP entry in OPP list before setting the min_freq/max_freq.
>> If the devfreq device don't use the OPP entry, devfreq_set_freq_table()
>> will return without any operation.
>>
>> IMHO, when devfreq device uses the OPP table including the frequency,
>> min_freq/max_freq should show the correct value as CPUFREQ framework.
>>
>
> The side effect of this patch shows up when opp_disable() and opp_enable()
> are used.

Ah. You're right.
I was not considering the the case of using opp_disable() and opp_enable().
I'll consider it again including the usage case of opp_diable/opp_enable.

Regards,
Chanwoo Choi
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