Documentation/hwmon/lm73.rst

Source file repositories/reference/linux-study-clean/Documentation/hwmon/lm73.rst

File Facts

System: Linux kernel
Corpus path: Documentation/hwmon/lm73.rst
Extension: .rst
Size: 2808 bytes
Lines: 99
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 lm73
==================

Supported chips:

  * Texas Instruments LM73

    Prefix: 'lm73'

    Addresses scanned: I2C 0x48, 0x49, 0x4a, 0x4c, 0x4d, and 0x4e

    Datasheet: Publicly available at the Texas Instruments website

	       https://www.ti.com/product/lm73


Author: Guillaume Ligneul <guillaume.ligneul@gmail.com>

Documentation: Chris Verges <kg4ysn@gmail.com>


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

The LM73 is a digital temperature sensor.  All temperature values are
given in degrees Celsius.

Measurement Resolution Support
------------------------------

The LM73 supports four resolutions, defined in terms of degrees C per
LSB: 0.25, 0.125, 0.0625, and 0.3125.  Changing the resolution mode
affects the conversion time of the LM73's analog-to-digital converter.
From userspace, the desired resolution can be specified as a function of
conversion time via the 'update_interval' sysfs attribute for the
device.  This attribute will normalize ranges of input values to the
maximum times defined for the resolution in the datasheet.

    ============= ============= ============
    Resolution    Conv. Time    Input Range
    (C/LSB)       (msec)        (msec)
    ============= ============= ============
    0.25          14             0..14
    0.125         28            15..28
    0.0625        56            29..56
    0.03125       112           57..infinity
    ============= ============= ============

The following examples show how the 'update_interval' attribute can be
used to change the conversion time::

    $ echo 0 > update_interval
    $ cat update_interval
    14
    $ cat temp1_input
    24250

    $ echo 22 > update_interval
    $ cat update_interval
    28
    $ cat temp1_input
    24125

    $ echo 56 > update_interval
    $ cat update_interval
    56
    $ cat temp1_input
    24062

    $ echo 85 > update_interval

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.