From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthias Kaehlcke Subject: [PATCH 00/11] Add throttler driver for non-thermal throttling Date: Fri, 25 May 2018 13:30:32 -0700 Message-ID: <20180525203043.249193-1-mka@chromium.org> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: MyungJoo Ham Cc: Kyungmin Park , Chanwoo Choi , Arnd Bergmann , Greg Kroah-Hartman , Rob Herring , Mark Rutland , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Brian Norris , Douglas Anderson , Matthias Kaehlcke List-Id: devicetree@vger.kernel.org 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 (11): PM / devfreq: Init user limits from OPP limits, not viceversa PM / devfreq: Fix handling of min/max_freq == 0 PM / devfreq: Remove check for df->max_freq == 0 from governors PM / devfreq: Remove redundant frequency adjustment from governors PM / devfreq: governors: Return device frequency limits instead of user limits PM / devfreq: Add struct devfreq_policy PM / devfreg: Add support policy notifiers PM / devfreq: Make update_devfreq() public misc: throttler: Add core support for non-thermal throttling dt-bindings: misc: add bindings for throttler misc/throttler: Add Chrome OS EC throttler .../devicetree/bindings/misc/throttler.txt | 41 ++ drivers/devfreq/devfreq.c | 203 ++++++---- drivers/devfreq/governor.h | 3 - drivers/devfreq/governor_passive.c | 4 +- drivers/devfreq/governor_performance.c | 5 +- drivers/devfreq/governor_powersave.c | 2 +- drivers/devfreq/governor_simpleondemand.c | 13 +- drivers/devfreq/governor_userspace.c | 16 +- drivers/misc/Kconfig | 1 + drivers/misc/Makefile | 1 + drivers/misc/throttler/Kconfig | 28 ++ drivers/misc/throttler/Makefile | 2 + drivers/misc/throttler/core.c | 373 ++++++++++++++++++ drivers/misc/throttler/cros_ec_throttler.c | 122 ++++++ include/linux/devfreq.h | 112 +++++- include/linux/throttler.h | 10 + 16 files changed, 813 insertions(+), 123 deletions(-) create mode 100644 Documentation/devicetree/bindings/misc/throttler.txt 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 -- 2.17.0.921.gf22659ad46-goog