Merge runtime PM updates and power capping updates for 6.17-rc1:
- Document return values of suspend-related API functions in the
runtime PM framework (Sakari Ailus)
- Mark last busy stamp in multiple autosuspend-related functions in the
runtime PM framework and update its documentation (Sakari Ailus)
- Take active children into account in pm_runtime_get_if_in_use() for
consistency (Rafael Wysocki)
- Fix NULL pointer dereference in get_pd_power_uw() in the dtpm_cpu
power capping driver (Sivan Zohar-Kotzer)
- Add support for the Bartlett Lake platform to the Intel RAPL power
capping driver (Qiao Wei)
- Add PL4 support for Panther Lake to the intel_rapl_msr power capping
driver (Zhang Rui)
* pm-runtime:
PM: runtime: Take active children into account in pm_runtime_get_if_in_use()
Documentation: PM: *_autosuspend() functions update last busy time
PM: runtime: Mark last busy stamp in pm_request_autosuspend()
PM: runtime: Mark last busy stamp in pm_runtime_autosuspend()
PM: runtime: Mark last busy stamp in pm_runtime_put_sync_autosuspend()
PM: runtime: Mark last busy stamp in pm_runtime_put_autosuspend()
PM: runtime: Document return values of suspend-related API functions
* pm-powercap:
powercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw()
powercap: intel_rapl: Add support for Bartlett Lake platform
powercap: intel_rapl_msr: Add PL4 support for Panther Lake
cpu_latency_qos_add|remove_notifier() doesn't exist, hence let's drop
the documentation of them.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://patch.msgid.link/20250710102656.127654-1-ulf.hansson@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Document that the *_autosuspend() variants of the Runtime PM functions
update the last busy timestamp.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20250616061212.2286741-7-sakari.ailus@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Set device's last busy timestamp to current time in
pm_request_autosuspend().
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20250616061212.2286741-6-sakari.ailus@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Set device's last busy timestamp to current time in
pm_runtime_autosuspend().
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20250616061212.2286741-5-sakari.ailus@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Set device's last busy timestamp to current time in
pm_runtime_put_sync_autosuspend().
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20250616061212.2286741-4-sakari.ailus@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Set device's last busy timestamp to current time in
pm_runtime_put_autosuspend(). Callers wishing not to do that will need to
use __pm_runtime_put_autosuspend().
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20250616061212.2286741-3-sakari.ailus@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fix the API name to free the allocated table in the example driver code
that modifies the EM. Also fix the passing of correct table when
updating the cost.
Signed-off-by: Atul Kumar Pant <atulpant.linux@gmail.com>
Link: https://patch.msgid.link/20250511071141.13237-1-atulpant.linux@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fixes a grammar issue ("than" -> "then") and changes "re-use" to
"reuse" for consistency with modern spelling.
Signed-off-by: Moon Hee Lee <moonhee.lee.ca@gmail.com>
Link: https://patch.msgid.link/20250506220057.5589-1-moonhee.lee.ca@gmail.com
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
pm_runtime_autosuspend() got accidentally renamed as
__pm_runtime_autosuspend() whereas the intention in the
patch was to rename pm_runtime_put_autosuspend() only.
Fix it.
Fixes: b7d46644e5 ("PM: runtime: Add pm_runtime_put_autosuspend() replacement")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20250410153106.4146265-2-sakari.ailus@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
We want to encourage use of newer Sphinx - they fixed a performance problem
and the docs build takes less than half the time it used to.
-----BEGIN PGP SIGNATURE-----
iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmebrwsPHGNvcmJldEBs
d24ubmV0AAoJEBdDWhNsDH5YscsH/RtKdO0Ibwg+VW1IvCcJBB9WXaUft7lgK9CL
KsnNsCJNh334LJ5Q4YT0EKetCwGiz74Xi2GR1qK8SIdYIbzxKeEP+p8IP3lfmbVg
pGxlb/WrOvkgZ1KzjLV4sWQ4jDznIUGB/nBTpG79K6m8niVXtTvCnqCkgAe6UVTu
N8kOqV48aVUOjYmJ+qlspJ4p0zUEddTSrkyy0AKrVU18h0HVrVDC4Ko+W6G3z5Bl
3v4XXjngpOVhs1stgLg/+R185zGOdCVKieOefyYNo3d7yZG1Xw1QMf41+bEpMqRI
6dLS/BEPGk+SdXPyGubxYMqofBpqUbsA+ky3eWboJCeM5iK1HNk=
=Sq+j
-----END PGP SIGNATURE-----
Merge tag 'docs-6.14-2' of git://git.lwn.net/linux
Pull documentation fixes from Jonathan Corbet:
"Two fixes for footnote-related warnings that appeared with Sphinx 8.x.
We want to encourage use of newer Sphinx - they fixed a performance
problem and the docs build takes less than half the time it used to"
* tag 'docs-6.14-2' of git://git.lwn.net/linux:
docs: power: Fix footnote reference for Toshiba Satellite P10-554
Documentation: ublk: Drop Stefan Hajnoczi's message footnote
Sphinx reports unreferenced footnote warning on "Video issues with S3
resume" doc:
Documentation/power/video.rst:213: WARNING: Footnote [#] is not referenced. [ref.footnote]
Fix the warning by separating footnote reference for Toshiba Satellite
P10-554 by a space.
Fixes: 151f4e2bdc ("docs: power: convert docs to ReST and rename to *.rst")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-next/20250122170335.148a23b0@canb.auug.org.au/
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20250122143456.68867-4-bagasdotme@gmail.com
Update the documentation to match the behaviour of the code.
pm_runtime_resume_and_get() always returns 0 on success, even if
__pm_runtime_resume() returns 1.
Fixes: 2c412337cf ("PM: runtime: Add documentation for pm_runtime_resume_and_get()")
Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Link: https://patch.msgid.link/20241203143729.478-1-paul.barker.ct@bp.renesas.com
[ rjw: Subject and changelog edits, adjusted new comment formatting ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add a helper function that allow regulator consumers to allow low-level
HW access, in order to enable/disable regulator in atomic context.
The use-case for RZ/G2L SoC is to enable VBUS selection register based
on vbus detection that happens in interrupt context.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://patch.msgid.link/20240616105402.45211-4-biju.das.jz@bp.renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
platform_pci_wakeup_init() was removed by d2e5f0c16a ("ACPI / PCI: Rework
the setup and cleanup of device wakeup") but was still mentioned in the
documentation.
Update the doc to refer to pci_acpi_setup(), which does the equivalent
work.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Merge Enery Model changes for 6.9-rc1:
- Allow the Energy Model to be updated dynamically (Lukasz Luba).
* pm-em: (24 commits)
PM: EM: Fix nr_states warnings in static checks
Documentation: EM: Update with runtime modification design
PM: EM: Add em_dev_compute_costs()
PM: EM: Remove old table
PM: EM: Change debugfs configuration to use runtime EM table data
drivers/thermal/devfreq_cooling: Use new Energy Model interface
drivers/thermal/cpufreq_cooling: Use new Energy Model interface
powercap/dtpm_devfreq: Use new Energy Model interface to get table
powercap/dtpm_cpu: Use new Energy Model interface to get table
PM: EM: Optimize em_cpu_energy() and remove division
PM: EM: Support late CPUs booting and capacity adjustment
PM: EM: Add performance field to struct em_perf_state and optimize
PM: EM: Add em_perf_state_from_pd() to get performance states table
PM: EM: Introduce em_dev_update_perf_domain() for EM updates
PM: EM: Add functions for memory allocations for new EM tables
PM: EM: Use runtime modified EM for CPUs energy estimation in EAS
PM: EM: Introduce runtime modifiable table
PM: EM: Split the allocation and initialization of the EM table
PM: EM: Check if the get_cost() callback is present in em_compute_costs()
PM: EM: Introduce em_compute_costs()
...
Merge cpufreq changes for 6.9-rc1:
- Enable preferred core support in the amd-pstate cpufreq driver (Meng
Li).
- Fix min_perf assignment in amd_pstate_adjust_perf() and make the
min/max limit perf values in amd-pstate always stay within the
(highest perf, lowest perf) range (Tor Vic, Meng Li).
- Change default transition delay in cpufreq to 2ms (Qais Yousef).
- Drop long-unused cpudata::prev_cummulative_iowait from the
intel_pstate cpufreq driver (Jiri Slaby).
- Allow intel_pstate to assign model-specific values to strings used in
the EPP sysfs interface and make it do so on Meteor Lake (Srinivas
Pandruvada).
- Remove references to 10ms minimum sampling rate from comments in the
cpufreq code (Pierre Gondois).
- Prevent scaling_cur_freq from exceeding scaling_max_freq when the
latter is an inefficient frequency (Shivnandan Kumar).
- Honour transition_latency over transition_delay_us in cpufreq (Qais
Yousef).
- Stop unregistering cpufreq cooling on CPU hot-remove (Viresh Kumar).
- General enhancements / cleanups to ARM cpufreq drivers (tianyu2,
Nícolas F. R. A. Prado, Erick Archer, Arnd Bergmann, Anastasia
Belova).
- Update cpufreq-dt-platdev to block/approve devices (Richard Acayan).
- Make the SCMI cpufreq driver get a transition delay value from
firmware (Pierre Gondois).
* pm-cpufreq: (28 commits)
cpufreq: scmi: Set transition_delay_us
firmware: arm_scmi: Populate fast channel rate_limit
firmware: arm_scmi: Populate perf commands rate_limit
cpufreq: Don't unregister cpufreq cooling on CPU hotplug
cpufreq: Honour transition_latency over transition_delay_us
cpufreq: Limit resolving a frequency to policy min/max
cpufreq: amd-pstate: adjust min/max limit perf
cpufreq: Remove references to 10ms min sampling rate
cpufreq: intel_pstate: Update default EPPs for Meteor Lake
cpufreq: intel_pstate: Allow model specific EPPs
cpufreq: qcom-hw: add CONFIG_COMMON_CLK dependency
cpufreq: dt-platdev: block SDM670 in cpufreq-dt-platdev
cpufreq: intel_pstate: remove cpudata::prev_cummulative_iowait
cpufreq: Change default transition delay to 2ms
cpufreq: amd-pstate: Fix min_perf assignment in amd_pstate_adjust_perf()
Documentation: PM: amd-pstate: Fix section title underline
Documentation: introduce amd-pstate preferrd core mode kernel command line options
Documentation: amd-pstate: introduce amd-pstate preferred core
cpufreq: amd-pstate: Update amd-pstate preferred core ranking dynamically
ACPI: cpufreq: Add highest perf change notification
...
Merge changes related to the runtime power management of devices for
6.9-rc1:
- Simplify pm_runtime_get_if_active() usage and add a replacement for
pm_runtime_put_autosuspend() (Sakari Ailus).
- Add a tracepoint for runtime_status changes tracking (Vilas Bhat).
- Fix section title markdown in the runtime PM documentation (Yiwei
Lin).
* pm-runtime:
Documentation: PM: Fix runtime_pm.rst markdown syntax
PM: runtime: add tracepoint for runtime_status changes
PM: runtime: Add pm_runtime_put_autosuspend() replacement
PM: runtime: Simplify pm_runtime_get_if_active() usage
The '7. Generic subsystem callbacks' should be a section title, but
the markdown syntax is not adequate now.
Fix it so the chapter can be linked at docs.kernel.org correctly.
Signed-off-by: Yiwei Lin <s921975628@gmail.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
According to the context, 'pci_pm_suspend_noirq' is the right
word for the changed sentence.
Signed-off-by: Yiwei Lin <s921975628@gmail.com>
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add __pm_runtime_put_autosuspend() that replaces
pm_runtime_put_autosuspend() for new users. The intent is to later
re-purpose pm_runtime_put_autosuspend() to also mark the device's last
busy stamp---which is what the vast majority of users actually need.
This is also described in pm_runtime_put_autosuspend() documentation.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
There are two ways to opportunistically increment a device's runtime PM
usage count, calling either pm_runtime_get_if_active() or
pm_runtime_get_if_in_use(). The former has an argument to tell whether to
ignore the usage count or not, and the latter simply calls the former with
ign_usage_count set to false. The other users that want to ignore the
usage_count will have to explicitly set that argument to true which is a
bit cumbersome.
To make this function more practical to use, remove the ign_usage_count
argument from the function. The main implementation is in a static
function called pm_runtime_get_conditional() and implementations of
pm_runtime_get_if_active() and pm_runtime_get_if_in_use() are moved to
runtime.c.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Takashi Iwai <tiwai@suse.de> # sound/
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> # drivers/accel/ivpu/
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com> # drivers/gpu/drm/i915/
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci/
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add a new description which covers the information about runtime EM.
It contains the design decisions, describes models and how they
reflect the reality. Remove description of the default EM. Add example
driver code which modifies EM. Add API documentation for the new feature
which allows to modify the EM in runtime.
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
As noted in the "Deprecated Interfaces, Language Features, Attributes,
and Conventions" documentation [1], size calculations (especially
multiplication) should not be performed in memory allocator (or similar)
function arguments due to the risk of them overflowing. This could lead
to values wrapping around and a smaller allocation being made than the
caller was expecting. Using those allocations could lead to linear
overflows of heap memory and other misbehaviors.
So, in the example code use the purpose specific kcalloc() function
instead of the argument size * count in the kzalloc() function.
At the same time, modify the translations accordingly.
Signed-off-by: Erick Archer <erick.archer@gmx.com>
Reviewed-by: Hu Haowen <2023002089@link.tyut.edu.cn>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Hu Haowen <2023002089@link.tyut.edu.cn>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The core freezer logic has been modified by commit f5d39b0208
("freezer,sched: Rewrite core freezer logic"), so adjust the
documentation to reflect the new code. The main changes include:
- Drop references to PF_FROZEN and PF_FREEZER_SKIP
- Describe TASK_FROZEN, TASK_FREEZABLE and __TASK_FREEZABLE_UNSAFE
- Replace system_freezing_cnt with freezer_active
- Use a different example for the loop of a freezable kernel thread,
since the old code is gone gone
Signed-off-by: Kevin Hao <haokexin@gmail.com>
[ rjw: Subject and changelog edits, doc text adjustments ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Add EPP support to the AMD P-state cpufreq driver (Perry Yuan, Wyes
Karny, Arnd Bergmann, Bagas Sanjaya).
- Drop the custom cpufreq driver for loongson1 that is not necessary
any more and the corresponding cpufreq platform device (Keguang
Zhang).
- Remove "select SRCU" from system sleep, cpufreq and OPP Kconfig
entries (Paul E. McKenney).
- Enable thermal cooling for Tegra194 (Yi-Wei Wang).
- Register module device table and add missing compatibles for
cpufreq-qcom-hw (Nícolas F. R. A. Prado, Abel Vesa and Luca Weiss).
- Various dt binding updates for qcom-cpufreq-nvmem and opp-v2-kryo-cpu
(Christian Marangi).
- Make kobj_type structure in the cpufreq core constant (Thomas
Weißschuh).
- Make cpufreq_unregister_driver() return void (Uwe Kleine-König).
- Make the TEO cpuidle governor check CPU utilization in order to refine
idle state selection (Kajetan Puchalski).
- Make Kconfig select the haltpoll cpuidle governor when the haltpoll
cpuidle driver is selected and replace a default_idle() call in that
driver with arch_cpu_idle() to allow MWAIT to be used (Li RongQing).
- Add Emerald Rapids Xeon support to the intel_idle driver (Artem
Bityutskiy).
- Add ARCH_SUSPEND_POSSIBLE dependencies for ARMv4 cpuidle drivers to
avoid randconfig build failures (Arnd Bergmann).
- Make kobj_type structures used in the cpuidle sysfs interface
constant (Thomas Weißschuh).
- Make the cpuidle driver registration code update microsecond values
of idle state parameters in accordance with their nanosecond values
if they are provided (Rafael Wysocki).
- Make the PSCI cpuidle driver prevent topology CPUs from being
suspended on PREEMPT_RT (Krzysztof Kozlowski).
- Document that pm_runtime_force_suspend() cannot be used with
DPM_FLAG_SMART_SUSPEND (Richard Fitzgerald).
- Add EXPORT macros for exporting PM functions from drivers (Richard
Fitzgerald).
- Remove /** from non-kernel-doc comments in hibernation code (Randy
Dunlap).
- Fix possible name leak in powercap_register_zone() (Yang Yingliang).
- Add Meteor Lake and Emerald Rapids support to the intel_rapl power
capping driver (Zhang Rui).
- Modify the idle_inject power capping facility to support 100% idle
injection (Srinivas Pandruvada).
- Fix large time windows handling in the intel_rapl power capping
driver (Zhang Rui).
- Fix memory leaks with using debugfs_lookup() in the generic PM
domains and Energy Model code (Greg Kroah-Hartman).
- Add missing 'cache-unified' property in the example for kryo OPP
bindings (Rob Herring).
- Fix error checking in opp_migrate_dentry() (Qi Zheng).
- Let qcom,opp-fuse-level be a 2-long array for qcom SoCs (Konrad
Dybcio).
- Modify some power management utilities to use the canonical ftrace
path (Ross Zwisler).
- Correct spelling problems for Documentation/power/ as reported by
codespell (Randy Dunlap).
-----BEGIN PGP SIGNATURE-----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=lZLx
-----END PGP SIGNATURE-----
Merge tag 'pm-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"These add EPP support to the AMD P-state cpufreq driver, add support
for new platforms to the Intel RAPL power capping driver, intel_idle
and the Qualcomm cpufreq driver, enable thermal cooling for Tegra194,
drop the custom cpufreq driver for loongson1 that is not necessary any
more (and the corresponding cpufreq platform device), fix assorted
issues and clean up code.
Specifics:
- Add EPP support to the AMD P-state cpufreq driver (Perry Yuan, Wyes
Karny, Arnd Bergmann, Bagas Sanjaya)
- Drop the custom cpufreq driver for loongson1 that is not necessary
any more and the corresponding cpufreq platform device (Keguang
Zhang)
- Remove "select SRCU" from system sleep, cpufreq and OPP Kconfig
entries (Paul E. McKenney)
- Enable thermal cooling for Tegra194 (Yi-Wei Wang)
- Register module device table and add missing compatibles for
cpufreq-qcom-hw (Nícolas F. R. A. Prado, Abel Vesa and Luca Weiss)
- Various dt binding updates for qcom-cpufreq-nvmem and
opp-v2-kryo-cpu (Christian Marangi)
- Make kobj_type structure in the cpufreq core constant (Thomas
Weißschuh)
- Make cpufreq_unregister_driver() return void (Uwe Kleine-König)
- Make the TEO cpuidle governor check CPU utilization in order to
refine idle state selection (Kajetan Puchalski)
- Make Kconfig select the haltpoll cpuidle governor when the haltpoll
cpuidle driver is selected and replace a default_idle() call in
that driver with arch_cpu_idle() to allow MWAIT to be used (Li
RongQing)
- Add Emerald Rapids Xeon support to the intel_idle driver (Artem
Bityutskiy)
- Add ARCH_SUSPEND_POSSIBLE dependencies for ARMv4 cpuidle drivers to
avoid randconfig build failures (Arnd Bergmann)
- Make kobj_type structures used in the cpuidle sysfs interface
constant (Thomas Weißschuh)
- Make the cpuidle driver registration code update microsecond values
of idle state parameters in accordance with their nanosecond values
if they are provided (Rafael Wysocki)
- Make the PSCI cpuidle driver prevent topology CPUs from being
suspended on PREEMPT_RT (Krzysztof Kozlowski)
- Document that pm_runtime_force_suspend() cannot be used with
DPM_FLAG_SMART_SUSPEND (Richard Fitzgerald)
- Add EXPORT macros for exporting PM functions from drivers (Richard
Fitzgerald)
- Remove /** from non-kernel-doc comments in hibernation code (Randy
Dunlap)
- Fix possible name leak in powercap_register_zone() (Yang Yingliang)
- Add Meteor Lake and Emerald Rapids support to the intel_rapl power
capping driver (Zhang Rui)
- Modify the idle_inject power capping facility to support 100% idle
injection (Srinivas Pandruvada)
- Fix large time windows handling in the intel_rapl power capping
driver (Zhang Rui)
- Fix memory leaks with using debugfs_lookup() in the generic PM
domains and Energy Model code (Greg Kroah-Hartman)
- Add missing 'cache-unified' property in the example for kryo OPP
bindings (Rob Herring)
- Fix error checking in opp_migrate_dentry() (Qi Zheng)
- Let qcom,opp-fuse-level be a 2-long array for qcom SoCs (Konrad
Dybcio)
- Modify some power management utilities to use the canonical ftrace
path (Ross Zwisler)
- Correct spelling problems for Documentation/power/ as reported by
codespell (Randy Dunlap)"
* tag 'pm-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (53 commits)
Documentation: amd-pstate: disambiguate user space sections
cpufreq: amd-pstate: Fix invalid write to MSR_AMD_CPPC_REQ
dt-bindings: opp: opp-v2-kryo-cpu: enlarge opp-supported-hw maximum
dt-bindings: cpufreq: qcom-cpufreq-nvmem: make cpr bindings optional
dt-bindings: cpufreq: qcom-cpufreq-nvmem: specify supported opp tables
PM: Add EXPORT macros for exporting PM functions
cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT
MIPS: loongson32: Drop obsolete cpufreq platform device
powercap: intel_rapl: Fix handling for large time window
cpuidle: driver: Update microsecond values of state parameters as needed
cpuidle: sysfs: make kobj_type structures constant
cpuidle: add ARCH_SUSPEND_POSSIBLE dependencies
PM: EM: fix memory leak with using debugfs_lookup()
PM: domains: fix memory leak with using debugfs_lookup()
cpufreq: Make kobj_type structure constant
cpufreq: davinci: Fix clk use after free
cpufreq: amd-pstate: avoid uninitialized variable use
cpufreq: Make cpufreq_unregister_driver() return void
OPP: fix error checking in opp_migrate_dentry()
dt-bindings: cpufreq: cpufreq-qcom-hw: Add SM8550 compatible
...
This driver was used for a couple of Intel PXA and Samsung S3C24xx
based PDAs, but all of those are now removed from the kernel, so
the driver itself is no longer useful.
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: linux-pm@vger.kernel.org
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Correct spelling problems for Documentation/power/ as reported
by codespell.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Merge devfreq changes, PM QoS change, and power management tools and
documentation changes for v5.20-rc1:
- Add new devfreq driver for Mediatek CCI (Cache Coherent
Interconnect) (Johnson Wang).
- Convert the Samsung Exynos SoC Bus bindings to DT schema of
exynos-bus.c (Krzysztof Kozlowski).
- Address kernel-doc warnings by adding the description for unused
fucntion parameters in devfreq core (Mauro Carvalho Chehab).
- Use NULL to pass a null pointer rather than zero according to the
function propotype in imx-bus.c (Colin Ian King).
- Print error message instead of error interger value in
tegra30-devfreq.c (Dmitry Osipenko).
- Add checks to prevent setting negative frequency QoS limits for
CPUs (Shivnandan Kumar).
- Update the pm-graph suite of utilities to the latest revision 5.9
including multiple improvements (Todd Brandt).
- Drop pme_interrupt reference from the PCI power management
documentation (Mario Limonciello).
* pm-devfreq:
PM / devfreq: tegra30: Add error message for devm_devfreq_add_device()
PM / devfreq: imx-bus: use NULL to pass a null pointer rather than zero
PM / devfreq: shut up kernel-doc warnings
dt-bindings: interconnect: samsung,exynos-bus: convert to dtschema
PM / devfreq: mediatek: Introduce MediaTek CCI devfreq driver
dt-bindings: interconnect: Add MediaTek CCI dt-bindings
* pm-qos:
PM: QoS: Add check to make sure CPU freq is non-negative
* pm-tools:
pm-graph v5.9
* pm-docs:
Documentation: PM: Drop pme_interrupt reference
The EM now uses the micro-Watts scale for the power values. Update
related documentation to reflect that fact.
Fix also a problematic sentence in the doc "to:" which triggers test
scripts complaining about wrong email address.
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
`pme_interrupt` was dropped from `struct pci_dev` as part of commit
8370c2dc4c ("PCI / PM: Drop pme_interrupt flag from struct pci_dev"),
but the Documentation still includes this member.
Remove it from the documentation as well and update it to have the missing
`pme_poll` member instead.
Fixes: 8370c2dc4c ("PCI / PM: Drop pme_interrupt flag from struct pci_dev")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add description about new artificial EM registration and use cases.
Update also the documentation with the new .get_cost() callback
description and usage.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The .active_power() callback passes the device pointer when it's called.
Aligned with a convetion present in other subsystems and pass the 'dev'
as a first argument. It looks more cleaner.
Adjust all affected drivers which implement that API callback.
Suggested-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The new registration method allows to get power values from the DT OPP
definition. The new OPP entry property "opp-microwatt" contains total
power expressed in micro-Watts. Align the EM documentation with this
new possible registration method of EM.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Merge an operating performance points (OPP) update, devfreq updates
and power capping updates for 5.17-rc1:
- Update outdated OPP documentation (Tang Yizhou).
- Reduce log severity for informative message regarding frequency
transition failures in devfreq (Tzung-Bi Shih).
- Add DRAM frequency controller devfreq driver for Allwinner sunXi
SoCs (Samuel Holland).
- Add missing COMMON_CLK dependency to the sun8i devfreq driver (Arnd
Bergmann).
- Add support for new layout of Psys PowerLimit Register on SPR to
the Intel RAPL power capping driver (Zhang Rui).
- Fix typo in a comment in idle_inject.c (Jason Wang).
- Remove unused function definition from the DTPM (Dynamit Thermal
Power Management) power capping framework (Daniel Lezcano).
- Reduce DTPM trace verbosity (Daniel Lezcano).
* pm-opp:
Documentation: power: Update outdated contents in opp.rst
* pm-devfreq:
PM / devfreq: Reduce log severity for informative message
PM / devfreq: sun8i: addd COMMON_CLK dependency
PM / devfreq: Add a driver for the sun8i/sun50i MBUS
* powercap:
powercap/drivers/dtpm: Reduce trace verbosity
powercap/drivers/dtpm: Remove unused function definition
powercap: fix typo in a comment in idle_inject.c
powercap: intel_rapl: support new layout of Psys PowerLimit Register on SPR
Pull OPP (operating performance points) updates for 5.17-rc1 from Viresh
Kumar:
"This updates the documentation to match the latest code."
* 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
Documentation: power: Update outdated contents in opp.rst
Three problems have been revised:
1. CONFIG_PM_OPP no longer depends on CONFIG_PM.
2. opp_find_freq_{ceil, floor} is renamed as dev_pm_opp_find_freq_{ceil,
floor}.
3. Make it clear that the 'opp' struct is actually dev_pm_opp.
Signed-off-by: Tang Yizhou <tangyizhou@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
In some cases (for example, during system-wide suspend and resume of
devices) it is useful to know whether or not runtime PM has ever been
enabled for a given device and, if so, what the runtime PM status of
it had been right before runtime PM was disabled for it last time.
For this reason, introduce a new struct dev_pm_info field called
last_status that will be used for capturing the runtime PM status of
the device when its power.disable_depth counter changes from 0 to 1.
The new field will be set to RPM_INVALID to start with and whenever
power.disable_depth changes from 1 to 0, so it will be valid only
when runtime PM of the device is currently disabled, but it has been
enabled at least once.
Immediately use power.last_status in rpm_resume() to make it handle
the case when PM runtime is disabled for the device, but its runtime
PM status is RPM_ACTIVE more consistently. Namely, make it return 1
if power.last_status is also equal to RPM_ACTIVE in that case (the
idea being that if the status was RPM_ACTIVE last time when
power.disable_depth was changing from 0 to 1 and it is still
RPM_ACTIVE, it can be assumed to reflect what happened to the device
last time when it was using runtime PM) and -EACCES otherwise.
Update the documentation to provide a description of last_status and
change the description of pm_runtime_resume() in it to reflect the
new behavior of rpm_active().
While at it, rearrange the code in pm_runtime_enable() to be more
straightforward and replace the WARN() macro in it with a pr_warn()
invocation which is less disruptive.
Link: https://lore.kernel.org/linux-pm/20211026222626.39222-1-ulf.hansson@linaro.org/t/#u
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The Energy Model (EM) can be registered in two ways:
1) Using a helper function, which under the hood relies on OPP framework
and DT entry in CPU node: 'dynamic-power-coefficient'. This is
a 'simple' EM because it's tied to the math formula:
Power = dynamic-power-coefficient * V^2 * f
2) Using em_dev_register_perf_domain() API function with a driver
custom callback which provides power for each performance state.
This is 'advanced' EM, since it can better reflect real power
measurements for each performance state. It's not limited to any
math formula and can better reflect real physics of the device.
Add description of these two methods to the documentation, so developers
could choose the suitable registration method (option).
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The Energy Model (EM) registration for CPUs should now be done using
a dedicated callback added recently into CPUFreq framework and drivers.
Commit c17495b01b ("cpufreq: Add callback to register with energy model")
The callback guaranties that the EM registration is called at the right
time during driver setup. To avoid mistakes update the documentation
to align with the existing code implementation.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Improve the existing documentation of the Energy Model and add kernel-doc
comments. This extends an API description and helps better understanding
the usage.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Recent changes to the PM core allows ->runtime_suspend|resume callbacks to
be unassigned.
In the earlier behaviour the PM core would return -ENOSYS, when trying to
runtime resume a device, for example. Let's update the documentation to
clarify this.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
pm_runtime_get_sync(), contradictory to intuition, does not drop the
runtime PM usage counter on errors which lead to several wrong usages in
drivers (missing the put). pm_runtime_resume_and_get() was added as a
better implementation so document the preference of using it, hoping it
will stop bad patterns.
Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
[ rjw: Documentation change edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
battery/charger driver changes:
* core: provide function stubs if CONFIG_POWER_SUPPLY=n
* core: reduce loglevel for probe defer info
* surface-battery: new battery driver for Surface
* surface-charger: new charger driver for Surface
* bq27xxx: add bq78z100 support
* bq27xxx: fix current_now/power_avg for newer chips
* cw2015: add CHARGE_NOW support
* ab8500: drop pdata support
* convert most DT bindings to YAML
* lot's of minor fixes and cleanups
reset drivers:
* ltc2952-poweroff: make trigger delay configurable from DT
* minor fixes and cleanups
-----BEGIN PGP SIGNATURE-----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=9IUN
-----END PGP SIGNATURE-----
Merge tag 'for-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull power supply and reset updates from Sebastian Reichel:
"battery/charger driver changes:
- core:
- provide function stubs if CONFIG_POWER_SUPPLY=n
- reduce loglevel for probe defer info
- surface:
- new battery and charger drivers for Surface
- bq27xxx:
- add bq78z100 support
- fix current_now/power_avg for newer chips
- cw2015:
- add CHARGE_NOW support
- ab8500:
- drop pdata support
- convert most DT bindings to YAML
- lots of minor fixes and cleanups
reset drivers:
- ltc2952-poweroff:
- make trigger delay configurable from DT
- minor fixes and cleanups"
* tag 'for-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (97 commits)
power: supply: cpcap-battery: fix invalid usage of list cursor
power: supply: bq256xx: add kerneldoc for structure members
power: supply: act8945a: correct kerneldoc
power: supply: max17040: remove unneeded double cast
power: supply: max17040: handle device_property_read_u8_array() failure
power: supply: max14577: remove unneeded variable initialization
power: supply: surface-charger: Make symbol 'surface_ac_pm_ops' static
power: supply: surface-battery: Make some symbols static
power: reset: restart-poweroff: Add missing MODULE_DEVICE_TABLE
power: reset: hisi-reboot: add missing MODULE_DEVICE_TABLE
power: supply: s3c_adc_battery: fix possible use-after-free in s3c_adc_bat_remove()
power: supply: generic-adc-battery: fix possible use-after-free in gab_remove()
power: supply: Add AC driver for Surface Aggregator Module
power: supply: Add battery driver for Surface Aggregator Module
power: supply: bq25980: Move props from battery node
power: supply: core: Use true and false for bool variable
power: supply: goldfish: Remove the GOLDFISH dependency
power: reset: ltc2952: make trigger delay configurable
power: supply: cpcap-charger: Simplify bool conversion
power: supply: cpcap-charger: Add usleep to cpcap charger to avoid usb plug bounce
...
Commit dd8088d5a8 ("PM: runtime: Add pm_runtime_resume_and_get to
deal with usage counter") added a new runtime-PM API function without
updating the documentation in runtime_pm.rst.
Add the missing documentation.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Fixes: dd8088d5a8 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
