[PATCH v3 00/12] Add throttler driver for non-thermal throttling

From: Matthias Kaehlcke <mka@chromium.org>
To: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Brian Norris <briannorris@chromium.org>,
	Douglas Anderson <dianders@chromium.org>,
	Enric Balletbo i Serra <enric.balletbo@collabora.com>,
	"Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Lee Jones <lee.jones@linaro.org>,
	Matthias Kaehlcke <mka@chromium.org>
Subject: [PATCH v3 00/12] Add throttler driver for non-thermal throttling
Date: Thu, 14 Jun 2018 12:47:00 -0700	[thread overview]
Message-ID: <20180614194712.102134-1-mka@chromium.org> (raw)

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 / devfreg: 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.c                         |  16 +
 drivers/misc/Kconfig                          |   1 +
 drivers/misc/Makefile                         |   1 +
 drivers/misc/throttler/Kconfig                |  33 +
 drivers/misc/throttler/Makefile               |   2 +
 drivers/misc/throttler/core.c                 | 687 ++++++++++++++++++
 drivers/misc/throttler/cros_ec_throttler.c    | 109 +++
 include/linux/cpufreq.h                       |   1 +
 include/linux/devfreq.h                       | 113 ++-
 include/linux/throttler.h                     |  21 +
 19 files changed, 1136 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

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2.18.0.rc1.242.g61856ae69a-goog