linux-kernel - [PATCH 0/6] devfreq: handle suspend/resume

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Date:   Wed, 21 Nov 2018 19:01:35 +0100
From:   Lukasz Luba <l.luba@...tner.samsung.com>
To:     linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org
Cc:     tjakobi@...h.uni-bielefeld.de, myungjoo.ham@...sung.com,
        kyungmin.park@...sung.com, cw00.choi@...sung.com,
        rjw@...ysocki.net, len.brown@...el.com, pavel@....cz,
        gregkh@...uxfoundation.org, keescook@...omium.org,
        anton@...msg.org, ccross@...roid.com, tony.luck@...el.com,
        robh+dt@...nel.org, mark.rutland@....com, kgene@...nel.org,
        krzk@...nel.org, m.szyprowski@...sung.com,
        b.zolnierkie@...sung.com, Lukasz Luba <l.luba@...tner.samsung.com>
Subject: [PATCH 0/6] devfreq: handle suspend/resume

Hi all,

This patch set aims to address the issue with devfreq devices' frequency
during suspend/resume. It extends suspend/resume by calls to Devfreq
framework. In the devfreq framework there is a small refactoring to avoid
code duplication in changging frequency (patch 2) and there are extensions
for suspending devices.

It has been tested on Odroid u3 with Exynos 4412.

The patch set draws on Tobias Jakobi's work posted ~2 years ago, who tried
to solve issue with devfreq device's frequency during suspend/resume.
During the discussion on LKML some corner cases and comments appeared
related to the design. This patch set address them keeping in mind
suggestions from Chanwoo Choi.
Tobias's paches:
https://www.spinics.net/lists/linux-samsung-soc/msg56602.html 

Regards,
Lukasz Luba

Lukasz Luba (6):
  devfreq: add basic fileds supporting suspend functionality
  devfreq: refactor set_target frequency function
  devfreq: add support for suspend/resume of a devfreq device
  devfreq: add devfreq_suspend/resume() functions
  drivers: power: suspend: call devfreq suspend/resume
  arm: dts: exynos4: set opp-suspend for DMC and leftbus

 arch/arm/boot/dts/exynos4210.dtsi |   2 +
 arch/arm/boot/dts/exynos4412.dtsi |   2 +
 drivers/base/power/main.c         |   3 +
 drivers/devfreq/devfreq.c         | 159 ++++++++++++++++++++++++++++++--------
 include/linux/devfreq.h           |  11 +++
 5 files changed, 146 insertions(+), 31 deletions(-)

-- 
2.7.4