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authorLinus Torvalds <torvalds@linux-foundation.org>2020-01-27 22:23:54 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-27 22:23:54 +0300
commit6d277aca488fdf0a1e67cd14b5a58869f66197c9 (patch)
tree2ed50bf4bb32092a9a95e7952533cbde98baeb24 /Documentation/ABI
parentaae1464f46a2403565f75717438118691d31ccf1 (diff)
parentc102671af085aacf17219e9bdcfccddc6620a866 (diff)
downloadlinux-6d277aca488fdf0a1e67cd14b5a58869f66197c9.tar.xz
Merge tag 'pm-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki: "These add ACPI support to the intel_idle driver along with an admin guide document for it, add support for CPR (Core Power Reduction) to the AVS (Adaptive Voltage Scaling) subsystem, add new hardware support in a few places, add some new sysfs attributes, debugfs files and tracepoints, fix bugs and clean up a bunch of things all over. Specifics: - Update the ACPI processor driver in order to export acpi_processor_evaluate_cst() to the code outside of it, add ACPI support to the intel_idle driver based on that and clean up that driver somewhat (Rafael Wysocki). - Add an admin guide document for the intel_idle driver (Rafael Wysocki). - Clean up cpuidle core and drivers, enable compilation testing for some of them (Benjamin Gaignard, Krzysztof Kozlowski, Rafael Wysocki, Yangtao Li). - Fix reference counting of OPP (operating performance points) table structures (Viresh Kumar). - Add support for CPR (Core Power Reduction) to the AVS (Adaptive Voltage Scaling) subsystem (Niklas Cassel, Colin Ian King, YueHaibing). - Add support for TigerLake Mobile and JasperLake to the Intel RAPL power capping driver (Zhang Rui). - Update cpufreq drivers: - Add i.MX8MP support to imx-cpufreq-dt (Anson Huang). - Fix usage of a macro in loongson2_cpufreq (Alexandre Oliva). - Fix cpufreq policy reference counting issues in s3c and brcmstb-avs (chenqiwu). - Fix ACPI table reference counting issue and HiSilicon quirk handling in the CPPC driver (Hanjun Guo). - Clean up spelling mistake in intel_pstate (Harry Pan). - Convert the kirkwood and tegra186 drivers to using devm_platform_ioremap_resource() (Yangtao Li). - Update devfreq core: - Add 'name' sysfs attribute for devfreq devices (Chanwoo Choi). - Clean up the handing of transition statistics and allow them to be reset by writing 0 to the 'trans_stat' devfreq device attribute in sysfs (Kamil Konieczny). - Add 'devfreq_summary' to debugfs (Chanwoo Choi). - Clean up kerneldoc comments and Kconfig indentation (Krzysztof Kozlowski, Randy Dunlap). - Update devfreq drivers: - Add dynamic scaling for the imx8m DDR controller and clean up imx8m-ddrc (Leonard Crestez, YueHaibing). - Fix DT node reference counting and nitialization error code path in rk3399_dmc and add COMPILE_TEST and HAVE_ARM_SMCCC dependency for it (Chanwoo Choi, Yangtao Li). - Fix DT node reference counting in rockchip-dfi and make it use devm_platform_ioremap_resource() (Yangtao Li). - Fix excessive stack usage in exynos-ppmu (Arnd Bergmann). - Fix initialization error code paths in exynos-bus (Yangtao Li). - Clean up exynos-bus and exynos somewhat (Artur Świgoń, Krzysztof Kozlowski). - Add tracepoints for tracking usage_count updates unrelated to status changes in PM-runtime (Michał Mirosław). - Add sysfs attribute to control the "sync on suspend" behavior during system-wide suspend (Jonas Meurer). - Switch system-wide suspend tests over to 64-bit time (Alexandre Belloni). - Make wakeup sources statistics in debugfs cover deleted ones which used to be the case some time ago (zhuguangqing). - Clean up computations carried out during hibernation, update messages related to hibernation and fix a spelling mistake in one of them (Wen Yang, Luigi Semenzato, Colin Ian King). - Add mailmap entry for maintainer e-mail address that has not been functional for several years (Rafael Wysocki)" * tag 'pm-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (83 commits) cpufreq: loongson2_cpufreq: adjust cpufreq uses of LOONGSON_CHIPCFG intel_idle: Clean up irtl_2_usec() intel_idle: Move 3 functions closer to their callers intel_idle: Annotate initialization code and data structures intel_idle: Move and clean up intel_idle_cpuidle_devices_uninit() intel_idle: Rearrange intel_idle_cpuidle_driver_init() intel_idle: Clean up NULL pointer check in intel_idle_init() intel_idle: Fold intel_idle_probe() into intel_idle_init() intel_idle: Eliminate __setup_broadcast_timer() cpuidle: fix cpuidle_find_deepest_state() kerneldoc warnings cpuidle: sysfs: fix warnings when compiling with W=1 cpuidle: coupled: fix warnings when compiling with W=1 cpufreq: brcmstb-avs: fix imbalance of cpufreq policy refcount PM: suspend: Add sysfs attribute to control the "sync on suspend" behavior PM / devfreq: Add debugfs support with devfreq_summary file Documentation: admin-guide: PM: Add intel_idle document cpuidle: arm: Enable compile testing for some of drivers PM-runtime: add tracepoints for usage_count changes cpufreq: intel_pstate: fix spelling mistake: "Whethet" -> "Whether" PM: hibernate: fix spelling mistake "shapshot" -> "snapshot" ...
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-class-devfreq18
-rw-r--r--Documentation/ABI/testing/sysfs-devices-system-cpu6
-rw-r--r--Documentation/ABI/testing/sysfs-power13
3 files changed, 33 insertions, 4 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-devfreq b/Documentation/ABI/testing/sysfs-class-devfreq
index 01196e19afca..9758eb85ade3 100644
--- a/Documentation/ABI/testing/sysfs-class-devfreq
+++ b/Documentation/ABI/testing/sysfs-class-devfreq
@@ -7,6 +7,13 @@ Description:
The name of devfreq object denoted as ... is same as the
name of device using devfreq.
+What: /sys/class/devfreq/.../name
+Date: November 2019
+Contact: Chanwoo Choi <cw00.choi@samsung.com>
+Description:
+ The /sys/class/devfreq/.../name shows the name of device
+ of the corresponding devfreq object.
+
What: /sys/class/devfreq/.../governor
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
@@ -48,12 +55,15 @@ What: /sys/class/devfreq/.../trans_stat
Date: October 2012
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
- This ABI shows the statistics of devfreq behavior on a
- specific device. It shows the time spent in each state and
- the number of transitions between states.
+ This ABI shows or clears the statistics of devfreq behavior
+ on a specific device. It shows the time spent in each state
+ and the number of transitions between states.
In order to activate this ABI, the devfreq target device
driver should provide the list of available frequencies
- with its profile.
+ with its profile. If need to reset the statistics of devfreq
+ behavior on a specific device, enter 0(zero) to 'trans_stat'
+ as following:
+ echo 0 > /sys/class/devfreq/.../trans_stat
What: /sys/class/devfreq/.../userspace/set_freq
Date: September 2011
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index fc20cde63d1e..2e0e3b45d02a 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -196,6 +196,12 @@ Description:
does not reflect it. Likewise, if one enables a deep state but a
lighter state still is disabled, then this has no effect.
+What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/default_status
+Date: December 2019
+KernelVersion: v5.6
+Contact: Linux power management list <linux-pm@vger.kernel.org>
+Description:
+ (RO) The default status of this state, "enabled" or "disabled".
What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/residency
Date: March 2014
diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power
index 6f87b9dd384b..5e6ead29124c 100644
--- a/Documentation/ABI/testing/sysfs-power
+++ b/Documentation/ABI/testing/sysfs-power
@@ -407,3 +407,16 @@ Contact: Kalesh Singh <kaleshsingh96@gmail.com>
Description:
The /sys/power/suspend_stats/last_failed_step file contains
the last failed step in the suspend/resume path.
+
+What: /sys/power/sync_on_suspend
+Date: October 2019
+Contact: Jonas Meurer <jonas@freesources.org>
+Description:
+ This file controls whether or not the kernel will sync()
+ filesystems during system suspend (after freezing user space
+ and before suspending devices).
+
+ Writing a "1" to this file enables the sync() and writing a "0"
+ disables it. Reads from the file return the current value.
+ The default is "1" if the build-time "SUSPEND_SKIP_SYNC" config
+ flag is unset, or "0" otherwise.