Documentation/hwmon/qnap-mcu-hwmon.rst
Source file repositories/reference/linux-study-clean/Documentation/hwmon/qnap-mcu-hwmon.rst
File Facts
- System
- Linux kernel
- Corpus path
Documentation/hwmon/qnap-mcu-hwmon.rst- Extension
.rst- Size
- 968 bytes
- Lines
- 28
- 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 qnap-mcu-hwmon
============================
This driver enables the use of the hardware monitoring and fan control
of the MCU used on some QNAP network attached storage devices.
Author: Heiko Stuebner <heiko@sntech.de>
Description
-----------
The driver implements a simple interface for driving the fan controlled by
setting its PWM output value and exposes the fan rpm and case-temperature
to user space through hwmon's sysfs interface.
The fan rotation speed returned via the optional 'fan1_input' is calculated
inside the MCU device.
The driver provides the following sensor accesses in sysfs:
=============== ======= =======================================================
fan1_input ro fan tachometer speed in RPM
pwm1 rw relative speed (0-255), 255=max. speed.
temp1_input ro Measured temperature in millicelsius
=============== ======= =======================================================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.