Documentation/devicetree/bindings/power/reset/qnap-poweroff.txt

File Facts

System

Linux kernel

Corpus path

Documentation/devicetree/bindings/power/reset/qnap-poweroff.txt

Extension

.txt

Size

535 bytes

Lines

16

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

QNAP NAS devices have a microcontroller controlling the main power
supply. This microcontroller is connected to UART1 of the Kirkwood and
Orion5x SoCs. Sending the character 'A', at 19200 baud, tells the
microcontroller to turn the power off.

Synology NAS devices use a similar scheme, but a different baud rate,
9600, and a different character, '1'.

Required Properties:
- compatible: Should be "qnap,power-off" or "synology,power-off"

- reg: Address and length of the register set for UART1
- clocks: tclk clock

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.