linux-kernel - RE: [RFC] PM / devfreq: Add support for alerts

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Message-ID: <20180531061720epcms1p31f5451bcf3150a7dddd33e1e415bb730@epcms1p3>
Date:   Thu, 31 May 2018 15:17:20 +0900
From:   MyungJoo Ham <myungjoo.ham@...sung.com>
To:     Akhil P Oommen <akhilpo@...eaurora.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mka@...omium.org" <mka@...omium.org>
CC:     "jcrouse@...eaurora.org" <jcrouse@...eaurora.org>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: RE: [RFC] PM / devfreq: Add support for alerts

> Currently, DEVFREQ reevaluates the device state periodically and/or
> based on the OPP list changes. Private API has to be exposed to allow
> the device driver to alert/notify the governor to reevaluate when a new
> set of data is available. This makes the governor more coupled to a
> particular device driver. We can improve here by exposing a DEVFREQ API
> to allow the device drivers to send generic alerts to the governor.
> 
> Signed-off-by: Akhil P Oommen <akhilpo@...eaurora.org>
> ---
>  drivers/devfreq/devfreq.c  | 21 +++++++++++++++++++++
>  drivers/devfreq/governor.h |  1 +
>  include/linux/devfreq.h    |  5 +++++
>  3 files changed, 27 insertions(+)
> 

Hello Akhil,

It appears that this will have the same effect with
"[PATCH 08/11] PM / devfreq: Make update_devfreq() public" from Matthias Kaehlcke, doesn't it?


Cheers,
MyungJoo