drivers/gpio/gpio-mm-lantiq.c

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpio-mm-lantiq.c

Extension

.c

Size

3975 bytes

Lines

161

Domain

Driver Families

Bucket

drivers/gpio

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/init.h
• linux/module.h
• linux/types.h
• linux/platform_device.h
• linux/mutex.h
• linux/gpio/driver.h
• linux/of.h
• linux/io.h
• linux/slab.h
• lantiq_soc.h

Detected Declarations

• struct ltq_mm
• function ltq_mm_apply
• function ltq_mm_set
• function ltq_mm_dir_out
• function ltq_mm_save_regs
• function ltq_mm_probe
• function ltq_mm_init
• function ltq_mm_exit
• module init ltq_mm_init

Annotated Snippet

subsys_initcall(ltq_mm_init);

static void __exit ltq_mm_exit(void)
{
	platform_driver_unregister(&ltq_mm_driver);
}
module_exit(ltq_mm_exit);

Annotation

• Immediate include surface: `linux/init.h`, `linux/module.h`, `linux/types.h`, `linux/platform_device.h`, `linux/mutex.h`, `linux/gpio/driver.h`, `linux/of.h`, `linux/io.h`.
• Detected declarations: `struct ltq_mm`, `function ltq_mm_apply`, `function ltq_mm_set`, `function ltq_mm_dir_out`, `function ltq_mm_save_regs`, `function ltq_mm_probe`, `function ltq_mm_init`, `function ltq_mm_exit`, `module init ltq_mm_init`.
• Atlas domain: Driver Families / drivers/gpio.
• 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.