Documentation/ABI/testing/sysfs-platform-power-on-reason

File Facts

System

Linux kernel

Corpus path

Documentation/ABI/testing/sysfs-platform-power-on-reason

Extension

[no extension]

Size

468 bytes

Lines

13

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/devices/platform/.../power_on_reason
Date:		June 2023
KernelVersion:	6.5
Contact:	Kamel Bouhara <kamel.bouhara@bootlin.com>
Description:	Shows system power on reason. The following strings/reasons can
		be read (the list can be extended):
		"regular power-up", "RTC wakeup", "watchdog timeout",
		"software reset", "reset button action", "CPU clock failure",
		"crystal oscillator failure", "brown-out reset",
		"unknown reason".

		The file is read only.

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.