drivers/misc/eeprom/at24.c

File Facts

System

Linux kernel

Corpus path

drivers/misc/eeprom/at24.c

Extension

.c

Size

27118 bytes

Lines

873

Domain

Driver Families

Bucket

drivers/misc

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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/acpi.h
• linux/bitops.h
• linux/capability.h
• linux/delay.h
• linux/i2c.h
• linux/init.h
• linux/jiffies.h
• linux/kernel.h
• linux/mod_devicetable.h
• linux/module.h
• linux/mutex.h
• linux/nvmem-provider.h
• linux/pm_runtime.h
• linux/property.h
• linux/regmap.h
• linux/regulator/consumer.h
• linux/slab.h

Detected Declarations

• struct at24_data
• struct at24_chip_data
• function at24_read_post_vaio
• function at24_adjust_read_count
• function at24_regmap_read
• function at24_adjust_write_count
• function at24_regmap_write
• function at24_read
• function at24_write
• function at24_make_dummy_client
• function at24_get_offset_adj
• function at24_probe_temp_sensor
• function at24_probe
• function probe
• function at24_remove
• function at24_suspend
• function at24_resume
• function at24_init
• function at24_exit
• module init at24_init

Annotated Snippet

module_init(at24_init);

static void __exit at24_exit(void)
{
	i2c_del_driver(&at24_driver);
}
module_exit(at24_exit);

MODULE_DESCRIPTION("Driver for most I2C EEPROMs");
MODULE_AUTHOR("David Brownell and Wolfram Sang");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/bitops.h`, `linux/capability.h`, `linux/delay.h`, `linux/i2c.h`, `linux/init.h`, `linux/jiffies.h`, `linux/kernel.h`.
• Detected declarations: `struct at24_data`, `struct at24_chip_data`, `function at24_read_post_vaio`, `function at24_adjust_read_count`, `function at24_regmap_read`, `function at24_adjust_write_count`, `function at24_regmap_write`, `function at24_read`, `function at24_write`, `function at24_make_dummy_client`.
• Atlas domain: Driver Families / drivers/misc.
• 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.