linux-kernel - Re: [RFC PATCH 3/3] Documentation: laptops: Add documentation for uniwill laptops

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Message-ID: <09403187-7746-42a6-88fe-7ca9e658962d@gmx.de>
Date: Wed, 18 Jun 2025 22:06:31 +0200
From: Armin Wolf <W_Armin@....de>
To: Randy Dunlap <rdunlap@...radead.org>, ilpo.jarvinen@...ux.intel.com,
 hdegoede@...hat.com, chumuzero@...il.com, corbet@....net, cs@...edo.de,
 wse@...edocomputers.com, ggo@...edocomputers.com
Cc: linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 platform-driver-x86@...r.kernel.org
Subject: Re: [RFC PATCH 3/3] Documentation: laptops: Add documentation for
 uniwill laptops

Am 18.06.25 um 08:23 schrieb Randy Dunlap:

> Hi,
>
> On 6/15/25 10:59 AM, Armin Wolf wrote:
>> Add documentation for admins regarding Uniwill laptops. This should
>> help users to setup the uniwill-laptop and uniwill-wmi drivers, which
>> sadly cannot be loaded automatically.
>>
>> Reported-by: cyear <chumuzero@...il.com>
>> Closes: https://github.com/lm-sensors/lm-sensors/issues/508
>> Closes: https://github.com/Wer-Wolf/uniwill-laptop/issues/3
>> Signed-off-by: Armin Wolf <W_Armin@....de>
>> ---
>>   Documentation/admin-guide/laptops/index.rst   |  1 +
>>   .../admin-guide/laptops/uniwill-laptop.rst    | 68 +++++++++++++++++++
>>   MAINTAINERS                                   |  1 +
>>   3 files changed, 70 insertions(+)
>>   create mode 100644 Documentation/admin-guide/laptops/uniwill-laptop.rst
>
>> diff --git a/Documentation/admin-guide/laptops/uniwill-laptop.rst b/Documentation/admin-guide/laptops/uniwill-laptop.rst
>> new file mode 100644
>> index 000000000000..8b977c09e747
>> --- /dev/null
>> +++ b/Documentation/admin-guide/laptops/uniwill-laptop.rst
>> @@ -0,0 +1,68 @@
>> +.. SPDX-License-Identifier: GPL-2.0+
>> +
>> +Uniwill laptop extra features
>> +=============================
>> +
>> +On laptops manufactured by Uniwill (either directly or as ODM), the ``uniwill-laptop`` and
>> +``uniwill-wmi`` driver both handle various platform-specific features.
>> +However due to a design flaw in the underlying firmware interface, both drivers might need
>> +to be loaded manually on some devices.
>> +
>> +.. warning:: Not all devices supporting the firmware interface will necessarily support those
>> +             drivers, please be careful.
>> +
>> +Module Loading
>> +--------------
>> +
>> +The ``uniwill-laptop`` driver relies on a DMI table to automatically load on supported devices.
>> +When using the ``force`` module parameter, this DMI check will be omitted, allowing the driver
>> +to be loaded on unsupported devices for testing purposes.
>> +
>> +The ``uniwill-wmi`` driver always needs to be loaded manually. However the ``uniwill-laptop``
>> +driver will automatically load it as a dependency.
>> +
>> +Hotkeys
>> +-------
>> +
>> +Usually the FN keys work without a special driver. However as soon as the ``uniwill-laptop`` driver
>> +is loaded, the FN keys need to be handled manually. This is done by the ``uniwill-wmi`` driver.
>> +
>> +Keyboard settings
>> +-----------------
>> +
>> +The ``uniwill-laptop`` driver allows the user to enable/disable:
>> +
>> + - the FN and super key lock functionality of the integrated keyboard
>> + - the touchpad toggle functionality of the integrated touchpad
> What is this touchpad toggle functionality, please?

The integrated touchpad has a button to enable/disable touchpad input. This feature can be
enabled/disabled using this setting.

Thanks,
Armin Wolf

>> +
>> +See Documentation/ABI/testing/sysfs-driver-uniwill-laptop for details.
>> +
>> +Hwmon interface
>> +---------------
>> +
>> +The ``uniwill-laptop`` driver supports reading of the CPU and GPU temperature and supports up to
>> +two fans. Userspace applications can access sensor readings over the hwmon sysfs interface.
>> +
>> +Platform profile
>> +----------------
>> +
>> +Support for changing the platform performance mode is currently not implemented.
>> +
>> +Battery Charging Control
>> +------------------------
>> +
>> +The ``uniwill-laptop`` driver supports controlling the battery charge limit. This happens over
>> +the standard ``charge_control_end_threshold`` power supply sysfs attribute. All values
>> +between 1 and 100 percent are supported.
>> +
>> +Additionally the driver signals the presence of battery charging issues thru the standard ``health``
>> +power supply sysfs attribute.
>> +
>> +Lightbar
>> +--------
>> +
>> +The ``uniwill-laptop`` driver exposes the lightbar found on some models as a standard multicolor
>> +led class device. The default name of this led class device is ``uniwill:multicolor:status``.
> s/led/LED/ 2 places, preferably.
>
>> +
>> +See Documentation/ABI/testing/sysfs-driver-uniwill-laptop for details on how to control the various
>> +animation modes of the lightbar.