sound/soc/codecs/wm8900.c

File Facts

System

Linux kernel

Corpus path

sound/soc/codecs/wm8900.c

Extension

.c

Size

39883 bytes

Lines

1339

Domain

Driver Families

Bucket

sound/soc

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/module.h
• linux/moduleparam.h
• linux/kernel.h
• linux/init.h
• linux/delay.h
• linux/pm.h
• linux/i2c.h
• linux/regmap.h
• linux/spi/spi.h
• linux/slab.h
• sound/core.h
• sound/pcm.h
• sound/pcm_params.h
• sound/soc.h
• sound/initval.h
• sound/tlv.h
• wm8900.h

Detected Declarations

• struct wm8900_priv
• struct _fll_div
• function wm8900_volatile_register
• function wm8900_reset
• function wm8900_hp_event
• function wm8900_hw_params
• function fll_factors
• function wm8900_set_fll
• function wm8900_set_dai_pll
• function wm8900_set_dai_clkdiv
• function wm8900_set_dai_fmt
• function wm8900_mute
• function wm8900_set_bias_level
• function wm8900_suspend
• function wm8900_resume
• function wm8900_probe
• function wm8900_spi_probe
• function wm8900_i2c_probe
• function wm8900_modinit
• function wm8900_exit
• module init wm8900_modinit

Annotated Snippet

module_init(wm8900_modinit);

static void __exit wm8900_exit(void)
{
#if IS_ENABLED(CONFIG_I2C)
	i2c_del_driver(&wm8900_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8900_spi_driver);
#endif
}
module_exit(wm8900_exit);

MODULE_DESCRIPTION("ASoC WM8900 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/moduleparam.h`, `linux/kernel.h`, `linux/init.h`, `linux/delay.h`, `linux/pm.h`, `linux/i2c.h`, `linux/regmap.h`.
• Detected declarations: `struct wm8900_priv`, `struct _fll_div`, `function wm8900_volatile_register`, `function wm8900_reset`, `function wm8900_hp_event`, `function wm8900_hw_params`, `function fll_factors`, `function wm8900_set_fll`, `function wm8900_set_dai_pll`, `function wm8900_set_dai_clkdiv`.
• Atlas domain: Driver Families / sound/soc.
• 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.