drivers/mfd/wm97xx-core.c

File Facts

System

Linux kernel

Corpus path

drivers/mfd/wm97xx-core.c

Extension

.c

Size

9241 bytes

Lines

361

Domain

Driver Families

Bucket

drivers/mfd

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.
• 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/device.h
• linux/mfd/core.h
• linux/mfd/wm97xx.h
• linux/module.h
• linux/regmap.h
• linux/slab.h
• linux/wm97xx.h
• sound/ac97/codec.h
• sound/ac97/compat.h

Detected Declarations

• struct wm97xx_priv
• function wm97xx_readable_reg
• function wm97xx_writeable_reg
• function wm9712_volatile_reg
• function wm97xx_ac97_probe
• function wm97xx_ac97_remove
• function wm97xx_module_init
• function wm97xx_module_exit
• module init wm97xx_module_init

Annotated Snippet

module_init(wm97xx_module_init);

static void __exit wm97xx_module_exit(void)
{
	snd_ac97_codec_driver_unregister(&wm97xx_ac97_driver);
}
module_exit(wm97xx_module_exit);

MODULE_DESCRIPTION("WM9712, WM9713 core driver");
MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/device.h`, `linux/mfd/core.h`, `linux/mfd/wm97xx.h`, `linux/module.h`, `linux/regmap.h`, `linux/slab.h`, `linux/wm97xx.h`, `sound/ac97/codec.h`.
• Detected declarations: `struct wm97xx_priv`, `function wm97xx_readable_reg`, `function wm97xx_writeable_reg`, `function wm9712_volatile_reg`, `function wm97xx_ac97_probe`, `function wm97xx_ac97_remove`, `function wm97xx_module_init`, `function wm97xx_module_exit`, `module init wm97xx_module_init`.
• Atlas domain: Driver Families / drivers/mfd.
• 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.