linux/Documentation/admin-guide/laptops, branch v6.17

platform/x86: lg-laptop: Fix WMAB call in fan_mode_store()

2025-09-25T09:21:43Z

When WMAB is called to set the fan mode, the new mode is read from either bits 0-1 or bits 4-5 (depending on the value of some other EC register). Thus when WMAB is called with bits 4-5 zeroed and called again with bits 0-1 zeroed, the second call undoes the effect of the first call. This causes writes to /sys/devices/platform/lg-laptop/fan_mode to have no effect (and causes reads to always report a status of zero). Fix this by calling WMAB once, with the mode set in bits 0,1 and 4,5. When the fan mode is returned from WMAB it always has this form, so there is no need to preserve the other bits. As a bonus, the driver now supports the "Performance" fan mode seen in the LG-provided Windows control app, which provides less aggressive CPU throttling but louder fan noise and shorter battery life. Also, correct the documentation to reflect that 0 corresponds to the default mode (what the Windows app calls "Optimal") and 1 corresponds to the silent mode. Fixes: dbf0c5a6b1f8 ("platform/x86: Add LG Gram laptop special features driver") Link: https://bugzilla.kernel.org/show_bug.cgi?id=204913#c4 Signed-off-by: Daniel Lee Link: https://patch.msgid.link/MN2PR06MB55989CB10E91C8DA00EE868DDC1CA@MN2PR06MB5598.namprd06.prod.outlook.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

Documentation: admin-guide: laptops: Add documentation for alienware-wmi

2025-04-11T10:10:16Z

Add driver admin-guide documentation for the alienware-wmi driver. Reviewed-by: Armin Wolf Signed-off-by: Kurt Borja Link: https://lore.kernel.org/r/20250329-hwm-v7-11-a14ea39d8a94@gmail.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: samsung-galaxybook: Add samsung-galaxybook driver

2025-02-07T11:57:03Z

Add a new driver for Samsung Galaxy Book series notebook devices with the following features: - Keyboard backlight control - Battery hook for installing power supply extension to add charge control end threshold - Controller for Samsung's performance modes using the platform profile interface - Adds firmware-attributes to control various system features - Handles various hotkeys and notifications Signed-off-by: Joshua Grisham Reviewed-by: Thomas Weißschuh Reviewed-by: Armin Wolf Link: https://lore.kernel.org/r/20250201105450.193450-1-josh@joshuagrisham.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: thinkpad-acpi: Add support for hotkey 0x1401

2024-12-29T14:55:10Z

F8 mode key on Lenovo 2025 platforms use a different key code. Adding support for the new keycode 0x1401. Tested on X1 Carbon Gen 13 and X1 2-in-1 Gen 10. Signed-off-by: Vishnu Sankar Reviewed-by: Mark Pearson Link: https://lore.kernel.org/r/20241227231840.21334-1-vishnuocv@gmail.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: Support for mode FN key

2024-01-24T10:40:55Z

New Thinkpads have added a 'Mode' Function key that on Windows allows you to choose the active profile (low-power, balanced, performance) Added suppoort for this hotkey (F8), and have it cycle through the options available. Tested on X1 Carbon G12. Signed-off-by: Mark Pearson Reviewed-by: Hans de Goede Link: https://lore.kernel.org/r/20240120232949.317337-1-mpearson-lenovo@squebb.ca Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: thinkpad_acpi: sysfs interface to auxmac

2023-09-28T10:12:36Z

Newer Thinkpads have a feature called MAC Address Pass-through. This patch provides a sysfs interface that userspace can use to get this auxiliary mac address. Signed-off-by: Fernando Eckhardt Valle Reviewed-by: Hans de Goede Link: https://lore.kernel.org/r/20230926202144.5906-1-fevalle@ipt.br Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

Documentation: admin-guide: correct spelling

2023-02-02T18:04:42Z

Correct spelling problems for Documentation/admin-guide/ as reported by codespell. Signed-off-by: Randy Dunlap Reviewed-by: Mukesh Ojha Cc: Tejun Heo Cc: Zefan Li Cc: Johannes Weiner Cc: cgroups@vger.kernel.org Cc: Alasdair Kergon Cc: Mike Snitzer Cc: dm-devel@redhat.com Cc: Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org Cc: linux-mm@kvack.org Link: https://lore.kernel.org/r/20230129231053.20863-2-rdunlap@infradead.org Signed-off-by: Jonathan Corbet

lg-laptop: Move setting of battery charge limit to common location

2022-02-23T10:36:24Z

For now leave also the driver specific location, with deprecated warning in documentation. Signed-off-by: Matan Ziv-Av Link: https://lore.kernel.org/r/eca2fa354f60b8a6e5a5c9c8e244fea56616970a.1645278914.git.matan@svgalib.org Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede

platform/x86: thinkpad_acpi: fix documentation for adaptive keyboard

2021-11-16T09:56:53Z

The different values were offset by 1. 0 is for "home mode", 1 for "web-browser mode", etc. Moreover, the URL to the laptop's user guide did not work anymore. Signed-off-by: Vincent Bernat Link: https://lore.kernel.org/r/20211109195209.176905-1-vincent@bernat.ch Signed-off-by: Hans de Goede

platform/x86: lg-laptop: Use correct event for keyboard backlight FN-key

2021-08-20T10:09:42Z

Use led_classdev_notify_brightness_hw_changed() instead of F16 key. Signed-off-by: Matan Ziv-Av Link: https://lore.kernel.org/r/2196990f167efe6a42d51fb85f4db4cdf4d9e80e.1629291912.git.matan@svgalib.org Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede