Documentation/hwmon/gpd-fan.rst

Source file repositories/reference/linux-study-clean/Documentation/hwmon/gpd-fan.rst

File Facts

System: Linux kernel
Corpus path: Documentation/hwmon/gpd-fan.rst
Extension: .rst
Size: 2147 bytes
Lines: 82
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

.. SPDX-License-Identifier: GPL-2.0-or-later

Kernel driver gpd-fan
=========================

Author:
    - Cryolitia PukNgae <cryolitia@uniontech.com>

Description
------------

Handheld devices from Shenzhen GPD Technology Co., Ltd. provide fan readings
and fan control through their embedded controllers.

Supported devices
-----------------

Currently the driver supports the following handhelds:

 - GPD Win Mini (7840U)
 - GPD Win Mini (8840U)
 - GPD Win Mini (HX370)
 - GPD Pocket 4
 - GPD Duo
 - GPD Win Max 2 (6800U)
 - GPD Win Max 2 2023 (7840U)
 - GPD Win Max 2 2024 (8840U)
 - GPD Win Max 2 2025 (HX370)
 - GPD Win 4 (6800U)
 - GPD Win 4 (7840U)
 - GPD Micro PC 2

Module parameters
-----------------

gpd_fan_board
  Force specific which module quirk should be used.
  Use it like "gpd_fan_board=wm2".

   - wm2
       - GPD Win 4 (7840U)
       - GPD Win Max 2 (6800U)
       - GPD Win Max 2 2023 (7840U)
       - GPD Win Max 2 2024 (8840U)
       - GPD Win Max 2 2025 (HX370)
   - win4
       - GPD Win 4 (6800U)
   - win_mini
       - GPD Win Mini (7840U)
       - GPD Win Mini (8840U)
       - GPD Win Mini (HX370)
       - GPD Pocket 4
       - GPD Duo
   - mpc2
       - GPD Micro PC 2

Sysfs entries
-------------

The following attributes are supported:

fan1_input
  Read Only. Reads current fan RPM.

pwm1_enable
  Read/Write. Enable manual fan control. Write "0" to disable control and run
  at full speed. Write "1" to set to manual, write "2" to let the EC control
  decide fan speed. Read this attribute to see current status.

  NB：In consideration of the safety of the device, when setting to manual mode,

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.