linux-kernel - Re: [PATCH v2 00/14] Add support for QCOM Core Power Reduction

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 26 Jul 2019 13:38:23 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Niklas Cassel <niklas.cassel@...aro.org>
Cc:     linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        jorge.ramirez-ortiz@...aro.org, sboyd@...nel.org,
        vireshk@...nel.org, bjorn.andersson@...aro.org,
        ulf.hansson@...aro.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 00/14] Add support for QCOM Core Power Reduction

On 25-07-19, 12:41, Niklas Cassel wrote:
> This series adds support for Core Power Reduction (CPR), a form of
> Adaptive Voltage Scaling (AVS), found on certain Qualcomm SoCs.
> 
> This series is based on top of the qcs404 cpufreq patch series that
> hasn't landed yet:
> https://patchwork.kernel.org/project/linux-arm-msm/list/?series=137809
> 
> CPR is a technology that reduces core power on a CPU or on other device.
> It reads voltage settings from efuses (that have been written in
> production), it uses these voltage settings as initial values, for each
> OPP.
> 
> After moving to a certain OPP, CPR monitors dynamic factors such as
> temperature, etc. and adjusts the voltage for that frequency accordingly
> to save power and meet silicon characteristic requirements.
> 
> This driver has been developed together with Jorge Ramirez-Ortiz, and
> is based on an RFC by Stephen Boyd[1], which in turn is based on work
> by others on codeaurora.org[2].
> 
> [1] https://lkml.org/lkml/2015/9/18/833
> [2] https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/regulator/cpr-regulator.c?h=msm-3.10
> 
> Changes since V1:
> Added a new patch implementing dev_pm_opp_find_level_exact() in order to
> make the CPR OPP table in device tree cleaner.
> For more detailed changes, check the "Changes since V1" as comments in
> the individual patches, where applicable.

Applied patches [1-9/14] to cpufreq and OPP trees and done some
reordering as well to keep all binding patches together.

Rob's Ack is missing on two of the binding patches and I will add them
later once he provides it.

Everything should be available here for you to base rest of the stuff.

git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git cpufreq/arm/linux-next

-- 
viresh