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Clark" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Armin Wolf , Jai Luthra , Greg Kroah-Hartman , Jack Wu , "Mario Limonciello (AMD)" , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-pm@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: [PATCH v3 1/4] platform profile: Extract the core from ACPI Date: Sun, 25 Oct 2026 00:34:26 +0200 Message-ID: <20261024223501.1420953-2-daniel.lezcano@oss.qualcomm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261024223501.1420953-1-daniel.lezcano@oss.qualcomm.com> References: <20261024223501.1420953-1-daniel.lezcano@oss.qualcomm.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=G7GJgNk5 c=1 sm=1 tr=0 ts=6add3799 cx=c_pps a=hnmNkyzTK/kJ09Xio7VxxA==:117 a=xqWC_Br6kY4A:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=8k6WQxmsAAAA:8 a=H7UWxkn5qGMa_TAHyjEA:9 a=-Z-CRQebJS9Ciu3_:21 a=PEH46H7Ffwr30OY-TuGO:22 X-Proofpoint-ORIG-GUID: YohKOhjlg0VQLqGreRpYKaVQMNbELswx X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI0MDA5MSBTYWx0ZWRfX3jEtXzRTkItn 7cuCHr+u9M07P9Dri2On9PiRCPdr8xR5rlG+vIZZ6V9ayF0V2WHDBhcWYhCMMj+8er/os+ENsel P3uENRyc3xBgXDguEPix19xyVehBZ+s= X-Proofpoint-GUID: YohKOhjlg0VQLqGreRpYKaVQMNbELswx X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI0MDA5MSBTYWx0ZWRfX7lFTgSaw8Xgd y0H08tTSeV8TSf8UevTM9ssWUuycGWpuD9IBbmWqJfZVBgmiBdHa964mKpfsw93sFEBcsDULhyF IUmRiCYcx6jgISd0ztwgnMCV0oDBDI71L8jy0kKUbjfyef6PXDSdubM0fEIQwh7ckX00CEt47xr EEa2w6nTQAIaWBwpKHfGSH1yc4caCVfsTFzABQBqWuHmqecwc999pP46fWeggzp4L52Ho0Q7sPt XM+Jt8mWXNZUZd73rkCQNje0GeK0aiTSkhkg9ZPx6BjWw7p3oaSiiy9Jy4vadr0zXhawCJSfQQ3 WRhXhJvHYbV0sXUU5m6KlB1vtnkmT8kRporH3lLe42YThw/wYh70MUcaPxQEEAOKwlmDT50YMkB q1EmXtLAUpakuwNcZuVH72Vid6S2n5hsleDlC56jVS1T7/XEunKvf90Y43DPGHZkYVlK15OgXkc QepM+HPMR6nFVntDI0w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-24_04,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 phishscore=0 spamscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610240091 Platform profile providers already use device-based callbacks and do not need ACPI types. The core is nevertheless confined to the ACPI build and refuses to initialize when ACPI is disabled. Move the implementation to drivers/platform/profile and introduce the firmware-independent PLATFORM_PROFILE symbol. Update all provider selectors. Keep provider-specific ACPI dependencies and the platform_profile module name. Isolate access to the legacy ACPI kobject in an optional compatibility object linked into the same module. Retain the legacy ABI on active ACPI systems, and initialize the class even when ACPI is absent or disabled. Use subsys_initcall_sync so the class is ready before built-in thermal and CPUFreq providers, but after ACPI has initialized its compatibility kobject. Signed-off-by: Daniel Lezcano --- drivers/acpi/Kconfig | 3 - drivers/acpi/Makefile | 1 - drivers/cpufreq/Kconfig.x86 | 2 +- drivers/platform/Kconfig | 16 +++++ drivers/platform/Makefile | 2 + drivers/platform/profile/Makefile | 5 ++ drivers/platform/profile/acpi.c | 15 +++++ .../profile/core.c} | 64 +++++++++++++------ drivers/platform/profile/profile.h | 17 +++++ drivers/platform/surface/Kconfig | 6 +- drivers/platform/x86/Kconfig | 10 +-- drivers/platform/x86/amd/pmf/Kconfig | 2 +- drivers/platform/x86/dell/Kconfig | 4 +- drivers/platform/x86/hp/Kconfig | 2 +- drivers/platform/x86/lenovo/Kconfig | 6 +- drivers/thermal/intel/int340x_thermal/Kconfig | 2 +- 16 files changed, 118 insertions(+), 39 deletions(-) create mode 100644 drivers/platform/profile/Makefile create mode 100644 drivers/platform/profile/acpi.c rename drivers/{acpi/platform_profile.c => platform/profile/core.c} (94%) create mode 100644 drivers/platform/profile/profile.h diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index f165d14cf61a..dd00312217de 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -351,9 +351,6 @@ config ACPI_THERMAL To compile this driver as a module, choose M here: the module will be called thermal. -config ACPI_PLATFORM_PROFILE - tristate - config ACPI_CUSTOM_DSDT_FILE string "Custom DSDT Table file to include" default "" diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index d1b0affb844f..f8af27341805 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -91,7 +91,6 @@ obj-$(CONFIG_ACPI_PROCESSOR) += processor.o obj-$(CONFIG_ACPI) += container.o obj-$(CONFIG_ACPI_THERMAL_LIB) += thermal_lib.o obj-$(CONFIG_ACPI_THERMAL) += thermal.o -obj-$(CONFIG_ACPI_PLATFORM_PROFILE) += platform_profile.o obj-$(CONFIG_ACPI_NFIT) += nfit/ obj-$(CONFIG_ACPI_NHLT) += nhlt.o obj-$(CONFIG_ACPI_NUMA) += numa/ diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86 index d6190b8dde4b..9e1e3391a084 100644 --- a/drivers/cpufreq/Kconfig.x86 +++ b/drivers/cpufreq/Kconfig.x86 @@ -39,7 +39,7 @@ config X86_AMD_PSTATE select ACPI_PROCESSOR select ACPI_CPPC_LIB if X86_64 select CPU_FREQ_GOV_SCHEDUTIL if SMP - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE select POWER_SUPPLY help This driver adds a CPUFreq driver which utilizes a fine grain diff --git a/drivers/platform/Kconfig b/drivers/platform/Kconfig index 312788f249c9..395b75f2edf0 100644 --- a/drivers/platform/Kconfig +++ b/drivers/platform/Kconfig @@ -1,4 +1,20 @@ # SPDX-License-Identifier: GPL-2.0-only +config PLATFORM_PROFILE + tristate "Platform profile support" + help + Provide a common sysfs interface for selecting platform power, + performance and cooling profiles. Platform-specific provider drivers + map their operating modes onto standard profile names, independently + of the firmware interface they use. + + The core exposes per-provider controls under /sys/class/platform-profile/. + A provider driver must register before profile attributes become + available. ACPI is not required; on ACPI systems the legacy system-wide + interface under /sys/firmware/acpi/ is also provided. + + To compile this as a module, choose M here: the module will be called + platform_profile. + source "drivers/platform/mips/Kconfig" source "drivers/platform/loongarch/Kconfig" diff --git a/drivers/platform/Makefile b/drivers/platform/Makefile index fa322e7f8716..b6732f2f3c85 100644 --- a/drivers/platform/Makefile +++ b/drivers/platform/Makefile @@ -3,6 +3,8 @@ # Makefile for linux/drivers/platform # +obj-$(CONFIG_PLATFORM_PROFILE) += profile/ + obj-$(CONFIG_X86) += x86/ obj-$(CONFIG_LOONGARCH) += loongarch/ obj-$(CONFIG_MELLANOX_PLATFORM) += mellanox/ diff --git a/drivers/platform/profile/Makefile b/drivers/platform/profile/Makefile new file mode 100644 index 000000000000..ae95ba09383c --- /dev/null +++ b/drivers/platform/profile/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_PLATFORM_PROFILE) += platform_profile.o + +platform_profile-y := core.o +platform_profile-$(CONFIG_ACPI) += acpi.o diff --git a/drivers/platform/profile/acpi.c b/drivers/platform/profile/acpi.c new file mode 100644 index 000000000000..ff925dedacaf --- /dev/null +++ b/drivers/platform/profile/acpi.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Compatibility with the original ACPI platform profile sysfs ABI. */ + +#include +#include + +#include "profile.h" + +struct kobject *platform_profile_compat_kobj(void) +{ + if (acpi_disabled) + return NULL; + + return kobject_get(acpi_kobj); +} diff --git a/drivers/acpi/platform_profile.c b/drivers/platform/profile/core.c similarity index 94% rename from drivers/acpi/platform_profile.c rename to drivers/platform/profile/core.c index b4c91d57f3d4..57c3dad2732b 100644 --- a/drivers/acpi/platform_profile.c +++ b/drivers/platform/profile/core.c @@ -4,15 +4,21 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -#include +#include #include #include #include +#include +#include #include +#include #include #include +#include #include +#include "profile.h" + #define to_pprof_handler(d) (container_of(d, struct platform_profile_handler, dev)) /* @@ -24,6 +30,15 @@ static DEFINE_MUTEX(profile_lock); /* Serialize registration and sysfs updates without blocking sysfs callbacks. */ static DEFINE_MUTEX(profile_registration_lock); static LIST_HEAD(profile_handlers); +static struct kobject *compat_kobj; + +static void profile_notify(void) +{ + if (compat_kobj) + sysfs_notify(compat_kobj, NULL, "platform_profile"); +} + +static int profile_update(void); struct platform_profile_handler { struct list_head node; @@ -243,7 +258,7 @@ static ssize_t profile_store(struct device *dev, return ret; } - sysfs_notify(acpi_kobj, NULL, "platform_profile"); + profile_notify(); return count; } @@ -458,7 +473,7 @@ static ssize_t platform_profile_store(struct kobject *kobj, return ret; } - sysfs_notify(acpi_kobj, NULL, "platform_profile"); + profile_notify(); return count; } @@ -484,6 +499,14 @@ static const struct attribute_group platform_profile_group = { .is_visible = profile_class_is_visible, }; +static int profile_update(void) +{ + if (compat_kobj) + return sysfs_update_group(compat_kobj, &platform_profile_group); + + return 0; +} + /** * platform_profile_notify - Notify class device and legacy sysfs interface * @dev: The class device @@ -493,7 +516,7 @@ void platform_profile_notify(struct device *dev) scoped_cond_guard(mutex_intr, return, &profile_lock) { _notify_class_profile(dev, NULL); } - sysfs_notify(acpi_kobj, NULL, "platform_profile"); + profile_notify(); } EXPORT_SYMBOL_GPL(platform_profile_notify); @@ -540,7 +563,7 @@ int platform_profile_cycle(void) return err; } - sysfs_notify(acpi_kobj, NULL, "platform_profile"); + profile_notify(); return 0; } @@ -615,9 +638,9 @@ struct device *platform_profile_register(struct device *dev, const char *name, scoped_guard(mutex, &profile_lock) list_add_tail(&to_pprof_handler(ppdev)->node, &profile_handlers); - sysfs_notify(acpi_kobj, NULL, "platform_profile"); + profile_notify(); - err = sysfs_update_group(acpi_kobj, &platform_profile_group); + err = profile_update(); if (err) goto cleanup_cur; @@ -657,8 +680,8 @@ void platform_profile_remove(struct device *dev) ida_free(&platform_profile_ida, pprof->minor); device_unregister(&pprof->dev); - sysfs_notify(acpi_kobj, NULL, "platform_profile"); - sysfs_update_group(acpi_kobj, &platform_profile_group); + profile_notify(); + profile_update(); } EXPORT_SYMBOL_GPL(platform_profile_remove); @@ -706,28 +729,33 @@ static int __init platform_profile_init(void) { int err; - if (acpi_disabled) - return -EOPNOTSUPP; - err = class_register(&platform_profile_class); if (err) return err; - err = sysfs_create_group(acpi_kobj, &platform_profile_group); - if (err) - class_unregister(&platform_profile_class); + compat_kobj = platform_profile_compat_kobj(); + if (compat_kobj) { + err = sysfs_create_group(compat_kobj, &platform_profile_group); + if (err) { + kobject_put(compat_kobj); + class_unregister(&platform_profile_class); + } + } return err; } static void __exit platform_profile_exit(void) { - sysfs_remove_group(acpi_kobj, &platform_profile_group); + if (compat_kobj) { + sysfs_remove_group(compat_kobj, &platform_profile_group); + kobject_put(compat_kobj); + } class_unregister(&platform_profile_class); } -module_init(platform_profile_init); +subsys_initcall_sync(platform_profile_init); module_exit(platform_profile_exit); MODULE_AUTHOR("Mark Pearson "); -MODULE_DESCRIPTION("ACPI platform profile sysfs interface"); +MODULE_DESCRIPTION("Platform profile sysfs interface"); MODULE_LICENSE("GPL"); diff --git a/drivers/platform/profile/profile.h b/drivers/platform/profile/profile.h new file mode 100644 index 000000000000..910c9f7da6a0 --- /dev/null +++ b/drivers/platform/profile/profile.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef _PLATFORM_PROFILE_INTERNAL_H +#define _PLATFORM_PROFILE_INTERNAL_H + +#include +#include + +#ifdef CONFIG_ACPI +struct kobject *platform_profile_compat_kobj(void); +#else +static inline struct kobject *platform_profile_compat_kobj(void) +{ + return NULL; +} +#endif + +#endif diff --git a/drivers/platform/surface/Kconfig b/drivers/platform/surface/Kconfig index f775c6ca1ec1..08f15f72f8ed 100644 --- a/drivers/platform/surface/Kconfig +++ b/drivers/platform/surface/Kconfig @@ -203,12 +203,12 @@ config SURFACE_PLATFORM_PROFILE tristate "Surface Platform Profile Driver" depends on ACPI depends on SURFACE_AGGREGATOR_REGISTRY - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE help - Provides support for the ACPI platform profile on 5th- and later + Provides support for platform profiles on 5th- and later generation Microsoft Surface devices. - More specifically, this driver provides ACPI platform profile support + More specifically, this driver provides platform profile support on Microsoft Surface devices with a Surface System Aggregator Module (SSAM) connected via the Surface Serial Hub (SSH / SAM-over-SSH). In other words, this driver provides platform profile support on the diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 4851bf45157d..b560982d2378 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -120,7 +120,7 @@ config BITLAND_MIFS_WMI depends on INPUT depends on LEDS_CLASS depends on POWER_SUPPLY - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE select INPUT_SPARSEKMAP help This is a driver for Bitland MiInterface based laptops. @@ -180,7 +180,7 @@ config ACER_WMI select INPUT_SPARSEKMAP select LEDS_CLASS select NEW_LEDS - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE help This is a driver for newer Acer (and Wistron) laptops. It adds wireless radio and bluetooth control, and on some laptops, @@ -279,7 +279,7 @@ config ASUS_WMI select INPUT_SPARSEKMAP select LEDS_CLASS select NEW_LEDS - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE help Say Y here if you have a WMI aware Asus laptop (like Eee PCs or new Asus Notebooks). @@ -646,7 +646,7 @@ config SAMSUNG_GALAXYBOOK depends on INPUT depends on LEDS_CLASS depends on SERIO_I8042 - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE select FW_ATTR_CLASS help This is a driver for Samsung Galaxy Book series notebooks. It adds @@ -905,7 +905,7 @@ config TOUCHSCREEN_DMI config INSPUR_PLATFORM_PROFILE tristate "Inspur WMI platform profile driver" depends on ACPI_WMI - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE help This will allow users to determine and control the platform modes between low-power, balanced and performance modes. diff --git a/drivers/platform/x86/amd/pmf/Kconfig b/drivers/platform/x86/amd/pmf/Kconfig index ad4faf18de47..31e13d6d7e75 100644 --- a/drivers/platform/x86/amd/pmf/Kconfig +++ b/drivers/platform/x86/amd/pmf/Kconfig @@ -8,7 +8,7 @@ config AMD_PMF depends on ACPI && PCI depends on POWER_SUPPLY depends on AMD_NODE - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE depends on TEE && AMDTEE depends on AMD_SFH_HID depends on HAS_IOMEM diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig index 9f0016056d7e..f6acf1cc2a2f 100644 --- a/drivers/platform/x86/dell/Kconfig +++ b/drivers/platform/x86/dell/Kconfig @@ -44,7 +44,7 @@ config ALIENWARE_WMI_WMAX bool "Alienware WMAX WMI device driver" default y depends on ALIENWARE_WMI - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE help Alienware WMI driver with AlienFX LED, HDMI, amplifier, deep sleep and AWCC thermal control capabilities. @@ -120,7 +120,7 @@ config DELL_PC depends on ACPI depends on DMI depends on DELL_SMBIOS - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE help This driver adds support for controlling the fan modes via platform_profile on supported Dell systems regardless of formfactor. diff --git a/drivers/platform/x86/hp/Kconfig b/drivers/platform/x86/hp/Kconfig index dd51491b9bcd..81a52194ff42 100644 --- a/drivers/platform/x86/hp/Kconfig +++ b/drivers/platform/x86/hp/Kconfig @@ -43,7 +43,7 @@ config HP_WMI depends on RFKILL || RFKILL = n select POWER_SUPPLY select INPUT_SPARSEKMAP - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE select HWMON help Say Y here if you want to support WMI-based hotkeys on HP laptops and diff --git a/drivers/platform/x86/lenovo/Kconfig b/drivers/platform/x86/lenovo/Kconfig index 516594993073..2291e1d48d13 100644 --- a/drivers/platform/x86/lenovo/Kconfig +++ b/drivers/platform/x86/lenovo/Kconfig @@ -12,7 +12,7 @@ config IDEAPAD_LAPTOP depends on BACKLIGHT_CLASS_DEVICE depends on ACPI_VIDEO || ACPI_VIDEO = n depends on ACPI_WMI || ACPI_WMI = n - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE select INPUT_SPARSEKMAP select NEW_LEDS select LEDS_CLASS @@ -77,7 +77,7 @@ config THINKPAD_ACPI depends on BACKLIGHT_CLASS_DEVICE depends on I2C depends on DRM - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE select DRM_PRIVACY_SCREEN select HWMON select NVRAM @@ -264,7 +264,7 @@ config LENOVO_WMI_GAMEZONE tristate "Lenovo GameZone WMI Driver" depends on ACPI_WMI depends on DMI - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE select LENOVO_WMI_EVENTS select LENOVO_WMI_HELPERS help diff --git a/drivers/thermal/intel/int340x_thermal/Kconfig b/drivers/thermal/intel/int340x_thermal/Kconfig index 4ced7bdcd62c..3026a0a8d073 100644 --- a/drivers/thermal/intel/int340x_thermal/Kconfig +++ b/drivers/thermal/intel/int340x_thermal/Kconfig @@ -12,7 +12,7 @@ config INT340X_THERMAL select ACPI_THERMAL_LIB select INTEL_SOC_DTS_IOSF_CORE select INTEL_TCC - select ACPI_PLATFORM_PROFILE + select PLATFORM_PROFILE select PROC_THERMAL_MMIO_RAPL if POWERCAP help Newer laptops and tablets that use ACPI may have thermal sensors and -- 2.43.0