Documentation/hwmon/w83l786ng.rst

Source file repositories/reference/linux-study-clean/Documentation/hwmon/w83l786ng.rst

File Facts

System: Linux kernel
Corpus path: Documentation/hwmon/w83l786ng.rst
Extension: .rst
Size: 1615 bytes
Lines: 67
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 w83l786ng
=======================

Supported chips:

  * Winbond W83L786NG/W83L786NR

    Prefix: 'w83l786ng'

    Addresses scanned: I2C 0x2e - 0x2f

    Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L786NRNG09.pdf

Author: Kevin Lo <kevlo@kevlo.org>


Module Parameters
-----------------

* reset boolean
    (default 0)

    Use 'reset=1' to reset the chip (via index 0x40, bit 7). The default
    behavior is no chip reset to preserve BIOS settings


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

This driver implements support for Winbond W83L786NG/W83L786NR chips.

The driver implements two temperature sensors, two fan rotation speed
sensors, and three voltage sensors.

Temperatures are measured in degrees Celsius and measurement resolution is 1
degC for temp1 and temp2.

Fan rotation speeds are reported in RPM (rotations per minute). Fan readings
can be divided by a programmable divider (1, 2, 4, 8, 16, 32, 64
or 128 for fan 1/2) to give the readings more range or accuracy.

Voltage sensors (also known as IN sensors) report their values in millivolts.
An alarm is triggered if the voltage has crossed a programmable minimum
or maximum limit.

/sys files
----------

pwm[1-2]
	    - this file stores PWM duty cycle or DC value (fan speed) in range:

	      0 (stop) to 255 (full)
pwm[1-2]_enable
	    - this file controls mode of fan/temperature control:

	    * 0 Manual Mode
	    * 1 Thermal Cruise
	    * 2 Smart Fan II
	    * 4 FAN_SET
pwm[1-2]_mode
	    - Select PWM of DC mode

	    * 0 DC
	    * 1 PWM
tolerance[1-2]
	    - Value in degrees of Celsius (degC) for +- T

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.