drivers/power/supply/apm_power.c

File Facts

System

Linux kernel

Corpus path

drivers/power/supply/apm_power.c

Extension

.c

Size

10407 bytes

Lines

377

Domain

Driver Families

Bucket

drivers/power

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/device.h
• linux/power_supply.h
• linux/apm-emulation.h

Detected Declarations

• struct find_bat_param
• enum apm_source
• function __find_main_battery
• function find_main_battery
• function do_calculate_time
• function calculate_time
• function calculate_capacity
• function apm_battery_apm_get_power_status
• function apm_battery_init
• function apm_battery_exit
• module init apm_battery_init

Annotated Snippet

module_init(apm_battery_init);
module_exit(apm_battery_exit);

MODULE_AUTHOR("Eugeny Boger <eugenyboger@dgap.mipt.ru>");
MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/device.h`, `linux/power_supply.h`, `linux/apm-emulation.h`.
• Detected declarations: `struct find_bat_param`, `enum apm_source`, `function __find_main_battery`, `function find_main_battery`, `function do_calculate_time`, `function calculate_time`, `function calculate_capacity`, `function apm_battery_apm_get_power_status`, `function apm_battery_init`, `function apm_battery_exit`.
• Atlas domain: Driver Families / drivers/power.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.