Documentation/hwmon/w83781d.rst

Source file repositories/reference/linux-study-clean/Documentation/hwmon/w83781d.rst

File Facts

System: Linux kernel
Corpus path: Documentation/hwmon/w83781d.rst
Extension: .rst
Size: 17825 bytes
Lines: 514
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

Kernel driver w83781d
=====================

Supported chips:

  * Winbond W83781D

    Prefix: 'w83781d'

    Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports)

    Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83781d.pdf

  * Winbond W83782D

    Prefix: 'w83782d'

    Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports)

    Datasheet: https://www.winbond.com

  * Winbond W83783S

    Prefix: 'w83783s'

    Addresses scanned: I2C 0x2d

    Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83783s.pdf

  * Asus AS99127F

    Prefix: 'as99127f'

    Addresses scanned: I2C 0x28 - 0x2f

    Datasheet: Unavailable from Asus



Authors:

      - Frodo Looijaard <frodol@dds.nl>,
      - Philip Edelbrock <phil@netroedge.com>,
      - Mark Studebaker <mdsxyz123@yahoo.com>

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

* init int
    (default 1)

    Use 'init=0' to bypass initializing the chip.
    Try this if your computer crashes when you load the module.

* reset int
    (default 0)
    The driver used to reset the chip on load, but does no more. Use
    'reset=1' to restore the old behavior. Report if you need to do this.

force_subclients=bus,caddr,saddr,saddr
  This is used to force the i2c addresses for subclients of
  a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b`
  to force the subclients of chip 0x2d on bus 0 to i2c addresses
  0x4a and 0x4b. This parameter is useful for certain Tyan boards.

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

This driver implements support for the Winbond W83781D, W83782D, W83783S
chips, and the Asus AS99127F chips. We will refer to them collectively as

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.