linux-kernel - RE: [PATCH 04/11] PM / devfreq: Remove redundant frequency adjustment from governors

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Date:   Mon, 28 May 2018 13:57:44 +0900
From:   MyungJoo Ham <myungjoo.ham@...sung.com>
To:     undisclosed-recipients:;
CC:     Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: RE: [PATCH 04/11] PM / devfreq: Remove redundant frequency
 adjustment from governors

> The userspace and simpleondemand governor determine a target frequency and
> then adjust it according to the df->min/max_freq limits that might have
> been set by user space. This adjustment is redundant, it is done in
> update_devfreq() for any governor, right after returning from
> governor->get_target_freq().
> 
> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> ---
>  drivers/devfreq/governor_simpleondemand.c |  5 -----
>  drivers/devfreq/governor_userspace.c      | 16 ++++------------
>  2 files changed, 4 insertions(+), 17 deletions(-)
> 

Yes, indeed. Governors are no longer required to be aware of min/max freq.

Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>