linux-kernel - Re: [PATCH 00/12] Add cpufreq and cci devfreq for mt8183, and SVS support

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Message-ID: <d08c0dc0-5573-6ba0-1d9f-18857c7f6fb6@samsung.com>
Date:   Wed, 20 May 2020 13:10:46 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     "Andrew-sh.Cheng" <andrew-sh.cheng@...iatek.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        srv_heupstream@...iatek.com
Subject: Re: [PATCH 00/12] Add cpufreq and cci devfreq for mt8183, and SVS
 support

Hi Andrew,

Could you explain the base commit of these patches?
When I tried to apply them to v5.7-rc1 for testing,
the merge conflict occurs.

Thanks,
Chanwoo Choi

On 5/20/20 12:42 PM, Andrew-sh.Cheng wrote:
> MT8183 supports CPU DVFS and CCI DVFS, and LITTLE cpus and CCI are in the same voltage domain.
> So, this series is to add drivers to handle the voltage coupling between CPU and CCI DVFS.
> 
> For SVS support, need OPP_EVENT_ADJUST_VOLTAGE and corresponding reaction.
> 
> Change since v5:
> 	- Changing dt-binding format to yaml.
> 	- Extending current devfreq passive_governor instead of create a new one.
> 	- Resend depending patches of Sravana Kannan base on kernel-5.7
> 
> 
> Andrew-sh.Cheng (6):
>   cpufreq: mediatek: add clock and regulator enable for intermediate
>     clock
>   dt-bindings: devfreq: add compatible for mt8183 cci devfreq
>   devfreq: add mediatek cci devfreq
>   opp: Modify opp API, dev_pm_opp_get_freq(), find freq in opp, even it
>     is disabled
>   cpufreq: mediatek: add opp notification for SVS support
>   devfreq: mediatek: cci devfreq register opp notification for SVS
>     support
> 
> Saravana Kannan (6):
>   OPP: Allow required-opps even if the device doesn't have power-domains
>   OPP: Add function to look up required OPP's for a given OPP
>   OPP: Improve required-opps linking
>   PM / devfreq: Cache OPP table reference in devfreq
>   PM / devfreq: Add required OPPs support to passive governor
>   PM / devfreq: Add cpu based scaling support to passive_governor
> 
>  .../devicetree/bindings/devfreq/mt8183-cci.yaml    |  51 ++++
>  drivers/cpufreq/mediatek-cpufreq.c                 | 122 ++++++++-
>  drivers/devfreq/Kconfig                            |  12 +
>  drivers/devfreq/Makefile                           |   1 +
>  drivers/devfreq/devfreq.c                          |   6 +
>  drivers/devfreq/governor_passive.c                 | 298 +++++++++++++++++++--
>  drivers/devfreq/mt8183-cci-devfreq.c               | 233 ++++++++++++++++
>  drivers/opp/core.c                                 |  85 +++++-
>  drivers/opp/of.c                                   | 108 ++++----
>  drivers/opp/opp.h                                  |   5 +
>  include/linux/devfreq.h                            |  42 ++-
>  include/linux/pm_opp.h                             |  11 +
>  12 files changed, 874 insertions(+), 100 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/devfreq/mt8183-cci.yaml
>  create mode 100644 drivers/devfreq/mt8183-cci-devfreq.c
>