Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
Source file repositories/reference/linux-study-clean/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
File Facts
- System
- Linux kernel
- Corpus path
Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia- Extension
[no extension]- Size
- 1094 bytes
- Lines
- 29
- 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
What: /sys/class/leds/<led>/device/brightness
Date: July 2020
KernelVersion: 5.9
Contact: Marek Behún <kabel@kernel.org>
Description: (RW) On the front panel of the Turris Omnia router there is also
a button which can be used to control the intensity of all the
LEDs at once, so that if they are too bright, user can dim them.
The microcontroller cycles between 8 levels of this global
brightness (from 100% to 0%), but this setting can have any
integer value between 0 and 100. It is therefore convenient to be
able to change this setting from software.
Format: %i
What: /sys/class/leds/<led>/device/gamma_correction
Date: August 2023
KernelVersion: 6.6
Contact: Marek Behún <kabel@kernel.org>
Description: (RW) Newer versions of the microcontroller firmware of the
Turris Omnia router support gamma correction for the RGB LEDs.
This feature can be enabled/disabled by writing to this file.
If the feature is not supported because the MCU firmware is too
old, the file always reads as 0, and writing to the file results
in the EOPNOTSUPP error.
Format: %iAnnotation
- 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.