From: Viresh Kumar <viresh.kumar@linaro.org>
To: "Andrew-sh.Cheng" <andrew-sh.cheng@mediatek.com>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Nishanth Menon <nm@ti.com>, Stephen Boyd <sboyd@kernel.org>,
linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
srv_heupstream@mediatek.com, fan.chen@mediatek.com,
Stephen Boyd <sboyd@codeaurora.org>,
Roger Lu <roger.lu@mediatek.com>
Subject: Re: [PATCH 6/8] PM / OPP: Support adjusting OPP voltages at runtime
Date: Mon, 20 May 2019 10:17:04 +0530 [thread overview]
Message-ID: <20190520044704.unftq6q5vy73z5bo@vireshk-i7> (raw)
In-Reply-To: <1557997725-12178-7-git-send-email-andrew-sh.cheng@mediatek.com>
On 16-05-19, 17:08, Andrew-sh.Cheng wrote:
> From: Stephen Boyd <sboyd@codeaurora.org>
>
> On some SoCs the Adaptive Voltage Scaling (AVS) technique is
> employed to optimize the operating voltage of a device. At a
> given frequency, the hardware monitors dynamic factors and either
> makes a suggestion for how much to adjust a voltage for the
> current frequency, or it automatically adjusts the voltage
> without software intervention. Add an API to the OPP library for
> the former case, so that AVS type devices can update the voltages
> for an OPP when the hardware determines the voltage should
> change. The assumption is that drivers like CPUfreq or devfreq
> will register for the OPP notifiers and adjust the voltage
> according to suggestions that AVS makes.
>
> This patch is devired from [1] submitted by Stephen.
> [1] https://lore.kernel.org/patchwork/patch/599279/
>
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
> drivers/opp/core.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/pm_opp.h | 11 +++++++
> 2 files changed, 89 insertions(+)
This is an rcu implementation which got removed long back from OPP core. Please
align this with the latest changes.
--
viresh
next prev parent reply other threads:[~2019-05-20 4:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1557997725-12178-1-git-send-email-andrew-sh.cheng@mediatek.com>
2019-05-16 9:23 ` [PATCH 0/8] Add cpufreq and cci devfreq for mt8183, and SVS support Viresh Kumar
[not found] ` <1557997725-12178-5-git-send-email-andrew-sh.cheng@mediatek.com>
2019-05-20 4:43 ` [PATCH 4/8] dt-bindings: devfreq: add compatible for mt8183 cci devfreq Viresh Kumar
[not found] ` <1557997725-12178-7-git-send-email-andrew-sh.cheng@mediatek.com>
2019-05-20 4:47 ` Viresh Kumar [this message]
2019-07-29 3:39 ` [PATCH 6/8] PM / OPP: Support adjusting OPP voltages at runtime Roger Lu
2019-07-29 9:20 ` Viresh Kumar
[not found] ` <1557997725-12178-9-git-send-email-andrew-sh.cheng@mediatek.com>
2019-05-24 8:04 ` [PATCH 8/8] devfreq: mediatek: cci devfreq register opp notification for SVS support Hsin-Yi Wang
[not found] ` <1557997725-12178-8-git-send-email-andrew-sh.cheng@mediatek.com>
2019-05-27 7:02 ` [PATCH 7/8] cpufreq: mediatek: add " Hsin-Yi Wang
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