linux-kernel - [PATCH v4 00/12] Add throttler driver for non-thermal throttling

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Message-Id: <20180621015237.100100-1-mka@chromium.org>
Date:   Wed, 20 Jun 2018 18:52:25 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     MyungJoo Ham <myungjoo.ham@...sung.com>
Cc:     Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Lee Jones <lee.jones@...aro.org>,
        Benson Leung <bleung@...omium.org>,
        Olof Johansson <olof@...om.net>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v4 00/12] Add throttler driver for non-thermal throttling

This series adds the throttler driver, for non-thermal throttling of
CPUs and devfreq devices. A use case for non-thermal throttling could
be the detection of a high battery discharge voltage, close to the
over-current protection (OCP) limit of the battery.

To support throttling of devfreq devices the series introduces the
concept of a devfreq policy and the DEVFREQ_ADJUST notifier (similar
to CPUFREQ_ADJUST). Further it includes some related devfreq bugfixes
and improvements that change some of the code that is also touched
by the policy changes.

Matthias Kaehlcke (12):
  PM / devfreq: Init user limits from OPP limits, not viceversa
  PM / devfreq: Fix handling of min/max_freq == 0
  PM / devfreq: Don't adjust to user limits in governors
  PM / devfreq: Add struct devfreq_policy
  PM / devfreq: Add support for policy notifiers
  PM / devfreq: Make update_devfreq() public
  PM / devfreq: export devfreq_class
  cpufreq: Add stub for cpufreq_update_policy()
  dt-bindings: PM / OPP: add opp-throttlers property
  misc: throttler: Add core support for non-thermal throttling
  misc: throttler: Add Chrome OS EC throttler
  mfd: cros_ec: Add throttler sub-device

 Documentation/devicetree/bindings/opp/opp.txt |   3 +
 MAINTAINERS                                   |   7 +
 drivers/devfreq/devfreq.c                     | 222 ++++--
 drivers/devfreq/governor.h                    |   6 +-
 drivers/devfreq/governor_passive.c            |   4 +-
 drivers/devfreq/governor_performance.c        |   5 +-
 drivers/devfreq/governor_powersave.c          |   2 +-
 drivers/devfreq/governor_simpleondemand.c     |  12 +-
 drivers/devfreq/governor_userspace.c          |  16 +-
 drivers/mfd/cros_ec_dev.c                     |  19 +
 drivers/misc/Kconfig                          |   1 +
 drivers/misc/Makefile                         |   1 +
 drivers/misc/throttler/Kconfig                |  33 +
 drivers/misc/throttler/Makefile               |   2 +
 drivers/misc/throttler/core.c                 | 705 ++++++++++++++++++
 drivers/misc/throttler/cros_ec_throttler.c    | 111 +++
 include/linux/cpufreq.h                       |   1 +
 include/linux/devfreq.h                       | 113 ++-
 include/linux/throttler.h                     |  21 +
 19 files changed, 1159 insertions(+), 125 deletions(-)
 create mode 100644 drivers/misc/throttler/Kconfig
 create mode 100644 drivers/misc/throttler/Makefile
 create mode 100644 drivers/misc/throttler/core.c
 create mode 100644 drivers/misc/throttler/cros_ec_throttler.c
 create mode 100644 include/linux/throttler.h

-- 
2.18.0.rc2.346.g013aa6912e-goog