drivers/i2c/busses/i2c-pnx.c

File Facts

System

Linux kernel

Corpus path

drivers/i2c/busses/i2c-pnx.c

Extension

.c

Size

20840 bytes

Lines

758

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/interrupt.h
• linux/ioport.h
• linux/delay.h
• linux/i2c.h
• linux/completion.h
• linux/platform_device.h
• linux/io.h
• linux/err.h
• linux/clk.h
• linux/slab.h
• linux/of.h

Detected Declarations

• struct i2c_pnx_mif
• struct i2c_pnx_algo_data
• function wait_timeout
• function wait_reset
• function i2c_pnx_start
• function i2c_pnx_stop
• function i2c_pnx_master_xmit
• function i2c_pnx_master_rcv
• function i2c_pnx_interrupt
• function i2c_pnx_timeout
• function bus_reset_if_active
• function i2c_pnx_xfer
• function i2c_pnx_func
• function i2c_pnx_controller_suspend
• function i2c_pnx_controller_resume
• function i2c_pnx_probe
• function i2c_pnx_remove
• function i2c_adap_pnx_init
• function i2c_adap_pnx_exit
• module init i2c_adap_pnx_init

Annotated Snippet

subsys_initcall(i2c_adap_pnx_init);
module_exit(i2c_adap_pnx_exit);

Annotation

• Immediate include surface: `linux/module.h`, `linux/interrupt.h`, `linux/ioport.h`, `linux/delay.h`, `linux/i2c.h`, `linux/completion.h`, `linux/platform_device.h`, `linux/io.h`.
• Detected declarations: `struct i2c_pnx_mif`, `struct i2c_pnx_algo_data`, `function wait_timeout`, `function wait_reset`, `function i2c_pnx_start`, `function i2c_pnx_stop`, `function i2c_pnx_master_xmit`, `function i2c_pnx_master_rcv`, `function i2c_pnx_interrupt`, `function i2c_pnx_timeout`.
• Atlas domain: Driver Families / drivers/i2c.
• Implementation status: integration implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.