kernel/linux.git/Documentation/admin-guide/pm, branch v6.12.103

cpufreq: Documentation: fix conservative governor freq_step description

2026-07-24T14:10:56+00:00

[ Upstream commit 03120e1425262c7d11f93362a88e579a1720390b ] The conservative governor documentation incorrectly states that setting freq_step to 0 will use the default 5% frequency step. In reality, since at least commit 8e677ce83bf4 ("[CPUFREQ] conservative: fixup governor to function more like ondemand logic"), freq_step=0 has always caused the governor to skip frequency updates entirely. Correct the documentation to reflect the actual behavior: freq_step=0 disables frequency changes by the governor entirely. Fixes: 2a0e49279850 ("cpufreq: User/admin documentation update and consolidation") Signed-off-by: Pengjie Zhang Reviewed-by: Zhongqiu Han [ rjw: Subject adjustment ] Link: https://patch.msgid.link/20260603055635.1549943-1-zhangpengjie2@huawei.com Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin

cpufreq: Documentation: fix sampling_down_factor range

2026-07-24T14:10:48+00:00

[ Upstream commit 85524e651d20944399322d46fb97960337831d43 ] The ondemand governor implementation accepts sampling_down_factor values from 1 to 100000 via MAX_SAMPLING_DOWN_FACTOR, but the documentation in admin-guide/pm/cpufreq.rst still says the valid range is 1 to 100. Update the documentation to match the actual code. Fixes: 2a0e49279850 ("cpufreq: User/admin documentation update and consolidation") Reviewed-by: Zhongqiu Han Signed-off-by: Pengjie Zhang Link: https://patch.msgid.link/20260518133457.2408463-1-zhangpengjie2@huawei.com Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin

cpufreq: docs: Reflect latency changes in docs

2024-10-21T11:20:03+00:00

There were two changes related to transition latency recently. Namely commit e13aa799c2a6 ("cpufreq: Change default transition delay to 2ms") and commit 37c6dccd6837 ("cpufreq: Remove LATENCY_MULTIPLIER"). Both changed the defaults / maximums so let the documentation reflect that. Signed-off-by: Christian Loehle Link: https://patch.msgid.link/46853b6e-bad5-4ace-9b23-ff157f234ae3@arm.com Signed-off-by: Rafael J. Wysocki

Merge tag 'platform-drivers-x86-v6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

2024-09-19T07:16:04+00:00

Pull x86 platform drivers updates from Hans de Goede: - asus-wmi: Add support for vivobook fan profiles - dell-laptop: Add knobs to change battery charge settings - lg-laptop: Add operation region support - intel-uncore-freq: Add support for efficiency latency control - intel/ifs: Add SBAF test support - intel/pmc: Ignore all LTRs during suspend - platform/surface: Support for arm64 based Surface devices - wmi: Pass event data directly to legacy notify handlers - x86/platform/geode: switch GPIO buttons and LEDs to software properties - bunch of small cleanups, fixes, hw-id additions, etc. * tag 'platform-drivers-x86-v6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (65 commits) MAINTAINERS: adjust file entry in INTEL MID PLATFORM platform/x86: x86-android-tablets: Adjust Xiaomi Pad 2 bottom bezel touch buttons LED platform/mellanox: mlxbf-pmc: fix lockdep warning platform/x86/amd: pmf: Add quirk for TUF Gaming A14 platform/x86: touchscreen_dmi: add nanote-next quirk platform/x86: asus-wmi: don't fail if platform_profile already registered platform/x86: asus-wmi: add debug print in more key places platform/x86: intel_scu_wdt: Move intel_scu_wdt.h to x86 subfolder platform/x86: intel_scu_ipc: Move intel_scu_ipc.h out of arch/x86/include/asm MAINTAINERS: Add Intel MID section platform/x86: panasonic-laptop: Add support for programmable buttons platform/olpc: Remove redundant null pointer checks in olpc_ec_setup_debugfs() platform/x86: intel/pmc: Ignore all LTRs during suspend platform/x86: wmi: Call both legacy and WMI driver notify handlers platform/x86: wmi: Merge get_event_data() with wmi_get_notify_data() platform/x86: wmi: Remove wmi_get_event_data() platform/x86: wmi: Pass event data directly to legacy notify handlers platform/x86: thinkpad_acpi: Fix uninitialized symbol 's' warning platform/x86: x86-android-tablets: Fix spelling in the comments platform/x86: ideapad-laptop: Make the scope_guard() clear of its scope ...

amd-pstate: Add missing documentation for `amd_pstate_prefcore_ranking`

2024-09-11T15:23:23+00:00

`amd_pstate_prefcore_ranking` reflects the dynamic rankings of a CPU core based on platform conditions. Explicitly include it in the documentation. Reviewed-by: Gautham R. Shenoy Signed-off-by: Mario Limonciello

cpufreq: amd-pstate: Add documentation for `amd_pstate_hw_prefcore`

2024-09-11T15:23:23+00:00

Explain that the sysfs file represents both preferred core being enabled by the user and supported by the hardware. Reviewed-by: Gautham R. Shenoy Signed-off-by: Mario Limonciello

cpufreq: amd-pstate: Merge amd_pstate_highest_perf_set() into amd_get_boost_ratio_numerator()

2024-09-11T15:23:23+00:00

The special case in amd_pstate_highest_perf_set() is the value used for calculating the boost numerator. Merge this into amd_get_boost_ratio_numerator() and then use that to calculate boost ratio. This allows dropping more special casing of the highest perf value. Reviewed-by: Gautham R. Shenoy Signed-off-by: Mario Limonciello

Documentation: admin-guide: pm: Add efficiency vs. latency tradeoff to uncore documentation

2024-09-04T18:17:31+00:00

Added documentation about the functionality of efficiency vs. latency tradeoff control in intel Xeon processors, and how this is configured via sysfs. Signed-off-by: Tero Kristo Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20240828153657.1296410-2-tero.kristo@linux.intel.com Signed-off-by: Hans de Goede

cpufreq: docs: Add missing scaling_available_frequencies description

2024-07-02T18:51:08+00:00

Add a description of the scaling_available_frequencies attribute in sysfs to the documentation. Signed-off-by: Raphael Gallais-Pou Reviewed-by: Bagas Sanjaya Acked-by: Viresh Kumar Link: https://patch.msgid.link/20240701171040.369030-1-rgallaispou@gmail.com Signed-off-by: Rafael J. Wysocki

Documentation: cpufreq: amd-pstate: update doc for Per CPU boost control method

2024-06-26T20:48:21+00:00

Updates the documentation in `amd-pstate.rst` to include information about the per CPU boost control feature. Users can now enable or disable the Core Performance Boost (CPB) feature on individual CPUs using the `boost` sysfs attribute. Reviewed-by: Gautham R. Shenoy Signed-off-by: Perry Yuan Co-developed-by: Mario Limonciello Link: https://lore.kernel.org/r/20240626042733.3747-5-mario.limonciello@amd.com Signed-off-by: Mario Limonciello