linux-kernel - Re: [v5, PATCH 0/5] Add cpufreq and cci devfreq for mt8183, and SVS support

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Date:   Tue, 17 Dec 2019 16:31:40 +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>
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, fan.chen@...iatek.com
Subject: Re: [v5, PATCH 0/5] Add cpufreq and cci devfreq for mt8183, and SVS
 support

Hi,

On 11/26/19 8:50 PM, Andrew-sh.Cheng wrote:
> From: "Andrew-sh.Cheng" <andrew-sh.cheng@...iatek.com>
> 
> 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.

What is correct full word of SVS?
- S(?) VS (Voltage Scaling) ?

> depend on:
> 	https://patchwork.kernel.org/patch/11193513/ 
> 
> Change since v4:
> 	- Remove redundant code
> 
> 
> Andrew-sh.Cheng (5):
>   cpufreq: mediatek: add clock enable for intermediate clock
>   dt-bindings: devfreq: add compatible for mt8183 cci devfreq
>   devfreq: add mediatek cci devfreq
>   cpufreq: mediatek: add opp notification for SVS support
>   devfreq: mediatek: cci devfreq register opp notification for SVS
>     support
> 
>  .../bindings/devfreq/mt8183-cci-devfreq.txt        |  20 ++
>  drivers/cpufreq/mediatek-cpufreq.c                 |  92 +++++-
>  drivers/devfreq/Kconfig                            |  10 +
>  drivers/devfreq/Makefile                           |   1 +
>  drivers/devfreq/mt8183-cci-devfreq.c               | 308 +++++++++++++++++++++
>  5 files changed, 429 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/devfreq/mt8183-cci-devfreq.txt
>  create mode 100644 drivers/devfreq/mt8183-cci-devfreq.c
> 


-- 
Best Regards,
Chanwoo Choi
Samsung Electronics