drivers/i2c/busses/i2c-at91-core.c

File Facts

System

Linux kernel

Corpus path

drivers/i2c/busses/i2c-at91-core.c

Extension

.c

Size

8393 bytes

Lines

358

Domain

Driver Families

Bucket

drivers/i2c

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/clk.h
• linux/err.h
• linux/i2c.h
• linux/io.h
• linux/module.h
• linux/of.h
• linux/platform_device.h
• linux/pm_runtime.h
• linux/pinctrl/consumer.h
• i2c-at91.h

Detected Declarations

• function Copyright
• function at91_twi_write
• function at91_disable_twi_interrupts
• function at91_twi_irq_save
• function at91_twi_irq_restore
• function at91_init_twi_bus
• function at91_twi_probe
• function at91_twi_remove
• function at91_twi_runtime_suspend
• function at91_twi_runtime_resume
• function at91_twi_suspend_noirq
• function at91_twi_resume_noirq
• function at91_twi_init
• function at91_twi_exit
• module init at91_twi_init

Annotated Snippet

subsys_initcall(at91_twi_init);
module_exit(at91_twi_exit);

MODULE_AUTHOR("Nikolaus Voss <n.voss@weinmann.de>");
MODULE_DESCRIPTION("I2C (TWI) driver for Atmel AT91");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:at91_i2c");

Annotation

• Immediate include surface: `linux/clk.h`, `linux/err.h`, `linux/i2c.h`, `linux/io.h`, `linux/module.h`, `linux/of.h`, `linux/platform_device.h`, `linux/pm_runtime.h`.
• Detected declarations: `function Copyright`, `function at91_twi_write`, `function at91_disable_twi_interrupts`, `function at91_twi_irq_save`, `function at91_twi_irq_restore`, `function at91_init_twi_bus`, `function at91_twi_probe`, `function at91_twi_remove`, `function at91_twi_runtime_suspend`, `function at91_twi_runtime_resume`.
• Atlas domain: Driver Families / drivers/i2c.
• 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.