drivers/watchdog/it87_wdt.c

File Facts

System

Linux kernel

Corpus path

drivers/watchdog/it87_wdt.c

Extension

.c

Size

8977 bytes

Lines

425

Domain

Driver Families

Bucket

drivers/watchdog

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bits.h
• linux/dmi.h
• linux/errno.h
• linux/init.h
• linux/io.h
• linux/ioport.h
• linux/module.h
• linux/moduleparam.h
• linux/printk.h
• linux/types.h
• linux/watchdog.h

Detected Declarations

• function superio_enter
• function superio_exit
• function superio_select
• function superio_inb
• function superio_outb
• function superio_inw
• function _wdt_update_timeout
• function _wdt_running
• function wdt_update_timeout
• function wdt_round_time
• function wdt_start
• function wdt_stop
• function timer
• function it87_wdt_init
• function it87_wdt_exit
• module init it87_wdt_init

Annotated Snippet

module_init(it87_wdt_init);
module_exit(it87_wdt_exit);

MODULE_AUTHOR("Oliver Schuster");
MODULE_DESCRIPTION("Hardware Watchdog Device Driver for IT87xx EC-LPC I/O");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/bits.h`, `linux/dmi.h`, `linux/errno.h`, `linux/init.h`, `linux/io.h`, `linux/ioport.h`, `linux/module.h`, `linux/moduleparam.h`.
• Detected declarations: `function superio_enter`, `function superio_exit`, `function superio_select`, `function superio_inb`, `function superio_outb`, `function superio_inw`, `function _wdt_update_timeout`, `function _wdt_running`, `function wdt_update_timeout`, `function wdt_round_time`.
• Atlas domain: Driver Families / drivers/watchdog.
• Implementation status: integration implementation candidate.

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.