Documentation/hwmon/sl28cpld.rst
Source file repositories/reference/linux-study-clean/Documentation/hwmon/sl28cpld.rst
File Facts
- System
- Linux kernel
- Corpus path
Documentation/hwmon/sl28cpld.rst- Extension
.rst- Size
- 1030 bytes
- Lines
- 37
- 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-only
Kernel driver sl28cpld
======================
Supported chips:
* Kontron sl28cpld
Prefix: 'sl28cpld'
Datasheet: not available
Authors: Michael Walle <michael@walle.cc>
Description
-----------
The sl28cpld is a board management controller which also exposes a hardware
monitoring controller. At the moment this controller supports a single fan
supervisor. In the future there might be other flavours and additional
hardware monitoring might be supported.
The fan supervisor has a 7 bit counter register and a counter period of 1
second. If the 7 bit counter overflows, the supervisor will automatically
switch to x8 mode to support a wider input range at the loss of
granularity.
Sysfs entries
-------------
The following attributes are supported.
======================= ========================================================
fan1_input Fan RPM. Assuming 2 pulses per revolution.
======================= ========================================================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.