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Merge tag 'platform-drivers-x86-v6.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
Pull x86 platform driver updates from Hans de Goede: - New drivers/platform/arm64 directory for arm64 embedded-controller drivers - New drivers: - Acer Aspire 1 embedded controllers (for arm64 models) - ACPI quickstart PNP0C32 buttons - Dell All-In-One backlight support (dell-uart-backlight) - Lenovo WMI camera buttons - Lenovo Yoga Tablet 2 Pro 1380F/L fast charging - MeeGoPad ANX7428 Type-C Cross Switch (power sequencing only) - MSI WMI sensors (fan speed sensors only for now) - Asus WMI: - 2024 ROG Mini-LED support - MCU powersave support - Vivobook GPU MUX support - Misc. other improvements - Ideapad laptop: - Export FnLock LED as LED class device - Switch platform profiles using thermal management key - Intel drivers: - IFS: various improvements - PMC: Lunar Lake support - SDSI: various improvements - TPMI/ISST: various improvements - tools: intel-speed-select: various improvements - MS Surface drivers: - Fan profile switching support - Surface Pro thermal sensors support - ThinkPad ACPI: - Reworked hotkey support to use sparse keymaps - Add support for new trackpoint-doubletap, Fn+N and Fn+G hotkeys - WMI core: - New WMI driver development guide - x86 Android tablets: - Lenovo Yoga Tablet 2 Pro 1380F/L support - Xiaomi MiPad 2 status LED and bezel touch buttons backlight support - Miscellaneous cleanups / fixes / improvements * tag 'platform-drivers-x86-v6.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (128 commits) platform/x86: Add new MeeGoPad ANX7428 Type-C Cross Switch driver devm-helpers: Fix a misspelled cancellation in the comments tools arch x86: Add dell-uart-backlight-emulator platform/x86: Add new Dell UART backlight driver platform/x86: x86-android-tablets: Create LED device for Xiaomi Pad 2 bottom bezel touch buttons platform/x86: x86-android-tablets: Xiaomi pad2 RGB LED fwnode updates platform/x86: x86-android-tablets: Pass struct device to init() platform/x86/amd: pmc: Add new ACPI ID AMDI000B platform/x86/amd: pmf: Add new ACPI ID AMDI0105 platform/x86: p2sb: Don't init until unassigned resources have been assigned platform/surface: aggregator: Log critical errors during SAM probing platform/x86: ISST: Support SST-BF and SST-TF per level platform/x86/fujitsu-laptop: Replace sprintf() with sysfs_emit() tools/power/x86/intel-speed-select: v1.19 release tools/power/x86/intel-speed-select: Display CPU as None for -1 tools/power/x86/intel-speed-select: SST BF/TF support per level tools/power/x86/intel-speed-select: Increase number of CPUs displayed tools/power/x86/intel-speed-select: Present all TRL levels for turbo-freq tools/power/x86/intel-speed-select: Fix display for unsupported levels tools/power/x86/intel-speed-select: Support multiple dies ...
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‎Documentation/ABI/testing/debugfs-msi-wmi-platform‎

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What: /sys/kernel/debug/msi-wmi-platform-<wmi_device_name>/*
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Date: April 2024
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KernelVersion: 6.10
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Contact: Armin Wolf <[email protected]>
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Description:
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This file allows to execute the associated WMI method with the same name.
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To start the execution, write a buffer containing the method arguments
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at file offset 0. Partial writes or writes at a different offset are not
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supported.
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The buffer returned by the WMI method can then be read from the file.
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See Documentation/wmi/devices/msi-wmi-platform.rst for details.

‎Documentation/ABI/testing/sysfs-platform-asus-wmi‎

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Change the mini-LED mode:
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* 0 - Single-zone,
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* 1 - Multi-zone
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* 2 - Multi-zone strong (available on newer generation mini-led)
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What: /sys/devices/platform/<platform>/available_mini_led_mode
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Date: Apr 2024
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KernelVersion: 6.10
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Contact: "Luke Jones" <[email protected]>
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Description:
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List the available mini-led modes.
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What: /sys/devices/platform/<platform>/ppt_pl1_spl
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Date: Jun 2023
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Description:
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Set the target temperature limit of the Nvidia dGPU:
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* min=75, max=87
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What: /sys/devices/platform/<platform>/boot_sound
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Date: Apr 2024
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KernelVersion: 6.10
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Contact: "Luke Jones" <[email protected]>
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Description:
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Set if the BIOS POST sound is played on boot.
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* 0 - False,
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* 1 - True
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What: /sys/devices/platform/<platform>/mcu_powersave
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Date: Apr 2024
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KernelVersion: 6.10
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Contact: "Luke Jones" <[email protected]>
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Description:
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Set if the MCU can go in to low-power mode on system sleep
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* 0 - False,
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* 1 - True

‎Documentation/devicetree/bindings/platform/acer,aspire1-ec.yaml‎

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/platform/acer,aspire1-ec.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Acer Aspire 1 Embedded Controller
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maintainers:
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- Nikita Travkin <[email protected]>
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description:
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The Acer Aspire 1 laptop uses an embedded controller to control battery
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and charging as well as to provide a set of misc features such as the
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laptop lid status and HPD events for the USB Type-C DP alt mode.
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properties:
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compatible:
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const: acer,aspire1-ec
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reg:
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const: 0x76
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interrupts:
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maxItems: 1
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connector:
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$ref: /schemas/connector/usb-connector.yaml#
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required:
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- compatible
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- reg
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- interrupts
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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embedded-controller@76 {
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compatible = "acer,aspire1-ec";
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reg = <0x76>;
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interrupts-extended = <&tlmm 30 IRQ_TYPE_LEVEL_LOW>;
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connector {
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compatible = "usb-c-connector";
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port {
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ec_dp_in: endpoint {
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remote-endpoint = <&mdss_dp_out>;
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};
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};
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};
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};
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};

‎Documentation/wmi/devices/msi-wmi-platform.rst‎

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.. SPDX-License-Identifier: GPL-2.0-or-later
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===================================================
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MSI WMI Platform Features driver (msi-wmi-platform)
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===================================================
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Introduction
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============
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Many MSI notebooks support various features like reading fan sensors. This features are controlled
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by the embedded controller, with the ACPI firmware exposing a standard ACPI WMI interface on top
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of the embedded controller interface.
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WMI interface description
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=========================
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The WMI interface description can be decoded from the embedded binary MOF (bmof)
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data using the `bmfdec <https://github.com/pali/bmfdec>`_ utility:
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::
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[WMI, Locale("MS\0x409"),
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Description("This class contains the definition of the package used in other classes"),
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guid("{ABBC0F60-8EA1-11d1-00A0-C90629100000}")]
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class Package {
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[WmiDataId(1), read, write, Description("16 bytes of data")] uint8 Bytes[16];
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};
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[WMI, Locale("MS\0x409"),
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Description("This class contains the definition of the package used in other classes"),
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guid("{ABBC0F63-8EA1-11d1-00A0-C90629100000}")]
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class Package_32 {
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[WmiDataId(1), read, write, Description("32 bytes of data")] uint8 Bytes[32];
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};
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[WMI, Dynamic, Provider("WmiProv"), Locale("MS\0x409"),
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Description("Class used to operate methods on a package"),
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guid("{ABBC0F6E-8EA1-11d1-00A0-C90629100000}")]
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class MSI_ACPI {
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[key, read] string InstanceName;
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[read] boolean Active;
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[WmiMethodId(1), Implemented, read, write, Description("Return the contents of a package")]
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void GetPackage([out, id(0)] Package Data);
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[WmiMethodId(2), Implemented, read, write, Description("Set the contents of a package")]
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void SetPackage([in, id(0)] Package Data);
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[WmiMethodId(3), Implemented, read, write, Description("Return the contents of a package")]
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void Get_EC([out, id(0)] Package_32 Data);
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[WmiMethodId(4), Implemented, read, write, Description("Set the contents of a package")]
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void Set_EC([in, id(0)] Package_32 Data);
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[WmiMethodId(5), Implemented, read, write, Description("Return the contents of a package")]
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void Get_BIOS([in, out, id(0)] Package_32 Data);
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[WmiMethodId(6), Implemented, read, write, Description("Set the contents of a package")]
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void Set_BIOS([in, out, id(0)] Package_32 Data);
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[WmiMethodId(7), Implemented, read, write, Description("Return the contents of a package")]
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void Get_SMBUS([in, out, id(0)] Package_32 Data);
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[WmiMethodId(8), Implemented, read, write, Description("Set the contents of a package")]
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void Set_SMBUS([in, out, id(0)] Package_32 Data);
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[WmiMethodId(9), Implemented, read, write, Description("Return the contents of a package")]
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void Get_MasterBattery([in, out, id(0)] Package_32 Data);
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[WmiMethodId(10), Implemented, read, write, Description("Set the contents of a package")]
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void Set_MasterBattery([in, out, id(0)] Package_32 Data);
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[WmiMethodId(11), Implemented, read, write, Description("Return the contents of a package")]
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void Get_SlaveBattery([in, out, id(0)] Package_32 Data);
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[WmiMethodId(12), Implemented, read, write, Description("Set the contents of a package")]
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void Set_SlaveBattery([in, out, id(0)] Package_32 Data);
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[WmiMethodId(13), Implemented, read, write, Description("Return the contents of a package")]
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void Get_Temperature([in, out, id(0)] Package_32 Data);
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[WmiMethodId(14), Implemented, read, write, Description("Set the contents of a package")]
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void Set_Temperature([in, out, id(0)] Package_32 Data);
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[WmiMethodId(15), Implemented, read, write, Description("Return the contents of a package")]
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void Get_Thermal([in, out, id(0)] Package_32 Data);
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[WmiMethodId(16), Implemented, read, write, Description("Set the contents of a package")]
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void Set_Thermal([in, out, id(0)] Package_32 Data);
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[WmiMethodId(17), Implemented, read, write, Description("Return the contents of a package")]
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void Get_Fan([in, out, id(0)] Package_32 Data);
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[WmiMethodId(18), Implemented, read, write, Description("Set the contents of a package")]
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void Set_Fan([in, out, id(0)] Package_32 Data);
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[WmiMethodId(19), Implemented, read, write, Description("Return the contents of a package")]
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void Get_Device([in, out, id(0)] Package_32 Data);
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[WmiMethodId(20), Implemented, read, write, Description("Set the contents of a package")]
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void Set_Device([in, out, id(0)] Package_32 Data);
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[WmiMethodId(21), Implemented, read, write, Description("Return the contents of a package")]
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void Get_Power([in, out, id(0)] Package_32 Data);
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[WmiMethodId(22), Implemented, read, write, Description("Set the contents of a package")]
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void Set_Power([in, out, id(0)] Package_32 Data);
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[WmiMethodId(23), Implemented, read, write, Description("Return the contents of a package")]
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void Get_Debug([in, out, id(0)] Package_32 Data);
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[WmiMethodId(24), Implemented, read, write, Description("Set the contents of a package")]
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void Set_Debug([in, out, id(0)] Package_32 Data);
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[WmiMethodId(25), Implemented, read, write, Description("Return the contents of a package")]
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void Get_AP([in, out, id(0)] Package_32 Data);
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[WmiMethodId(26), Implemented, read, write, Description("Set the contents of a package")]
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void Set_AP([in, out, id(0)] Package_32 Data);
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[WmiMethodId(27), Implemented, read, write, Description("Return the contents of a package")]
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void Get_Data([in, out, id(0)] Package_32 Data);
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[WmiMethodId(28), Implemented, read, write, Description("Set the contents of a package")]
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void Set_Data([in, out, id(0)] Package_32 Data);
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[WmiMethodId(29), Implemented, read, write, Description("Return the contents of a package")]
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void Get_WMI([out, id(0)] Package_32 Data);
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};
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Due to a peculiarity in how Windows handles the ``CreateByteField()`` ACPI operator (errors only
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happen when a invalid byte field is ultimately accessed), all methods require a 32 byte input
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buffer, even if the Binay MOF says otherwise.
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The input buffer contains a single byte to select the subfeature to be accessed and 31 bytes of
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input data, the meaning of which depends on the subfeature being accessed.
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The output buffer contains a singe byte which signals success or failure (``0x00`` on failure)
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and 31 bytes of output data, the meaning if which depends on the subfeature being accessed.
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WMI method Get_EC()
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-------------------
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Returns embedded controller information, the selected subfeature does not matter. The output
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data contains a flag byte and a 28 byte controller firmware version string.
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The first 4 bits of the flag byte contain the minor version of the embedded controller interface,
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with the next 2 bits containing the major version of the embedded controller interface.
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The 7th bit signals if the embedded controller page chaged (exact meaning is unknown), and the
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last bit signals if the platform is a Tigerlake platform.
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The MSI software seems to only use this interface when the last bit is set.
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WMI method Get_Fan()
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--------------------
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Fan speed sensors can be accessed by selecting subfeature ``0x00``. The output data contains
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up to four 16-bit fan speed readings in big-endian format. Most machines do not support all
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four fan speed sensors, so the remaining reading are hardcoded to ``0x0000``.
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The fan RPM readings can be calculated with the following formula:
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RPM = 480000 / <fan speed reading>
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If the fan speed reading is zero, then the fan RPM is zero too.
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WMI method Get_WMI()
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--------------------
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Returns the version of the ACPI WMI interface, the selected subfeature does not matter.
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The output data contains two bytes, the first one contains the major version and the last one
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contains the minor revision of the ACPI WMI interface.
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The MSI software seems to only use this interface when the major version is greater than two.
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Reverse-Engineering the MSI WMI Platform interface
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==================================================
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.. warning:: Randomly poking the embedded controller interface can potentially cause damage
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to the machine and other unwanted side effects, please be careful.
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The underlying embedded controller interface is used by the ``msi-ec`` driver, and it seems
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that many methods just copy a part of the embedded controller memory into the output buffer.
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This means that the remaining WMI methods can be reverse-engineered by looking which part of
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the embedded controller memory is accessed by the ACPI AML code. The driver also supports a
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debugfs interface for directly executing WMI methods. Additionally, any safety checks regarding
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unsupported hardware can be disabled by loading the module with ``force=true``.
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More information about the MSI embedded controller interface can be found at the
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`msi-ec project <https://github.com/BeardOverflow/msi-ec>`_.
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Special thanks go to github user `glpnk` for showing how to decode the fan speed readings.

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