drivers/w1/slaves/w1_ds250x.c

File Facts

System

Linux kernel

Corpus path

drivers/w1/slaves/w1_ds250x.c

Extension

.c

Size

6455 bytes

Lines

292

Domain

Driver Families

Bucket

drivers/w1

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/kernel.h
• linux/module.h
• linux/moduleparam.h
• linux/device.h
• linux/types.h
• linux/delay.h
• linux/slab.h
• linux/crc16.h
• linux/w1.h
• linux/nvmem-provider.h

Detected Declarations

• struct w1_eprom_data
• function w1_ds2502_read_page
• function w1_ds2505_read_page
• function w1_nvmem_read
• function w1_eprom_add_slave
• function w1_ds250x_init
• function w1_ds250x_exit
• module init w1_ds250x_init

Annotated Snippet

module_init(w1_ds250x_init);
module_exit(w1_ds250x_exit);

MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfe@suse.de>");
MODULE_DESCRIPTION("w1 family driver for DS250x Add Only Memory");
MODULE_LICENSE("GPL");
MODULE_ALIAS("w1-family-" __stringify(W1_DS2502_FAMILY));
MODULE_ALIAS("w1-family-" __stringify(W1_DS2505_FAMILY));
MODULE_ALIAS("w1-family-" __stringify(W1_DS2501_UNW_FAMILY));
MODULE_ALIAS("w1-family-" __stringify(W1_DS2502_UNW_FAMILY));

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/moduleparam.h`, `linux/device.h`, `linux/types.h`, `linux/delay.h`, `linux/slab.h`, `linux/crc16.h`.
• Detected declarations: `struct w1_eprom_data`, `function w1_ds2502_read_page`, `function w1_ds2505_read_page`, `function w1_nvmem_read`, `function w1_eprom_add_slave`, `function w1_ds250x_init`, `function w1_ds250x_exit`, `module init w1_ds250x_init`.
• Atlas domain: Driver Families / drivers/w1.
• 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.