drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c

File Facts

System

Linux kernel

Corpus path

drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c

Extension

.c

Size

4982 bytes

Lines

169

Domain

Driver Families

Bucket

drivers/misc

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• 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/mfd/core.h
• linux/module.h
• linux/pci.h
• linux/spinlock.h
• linux/gpio/driver.h
• linux/interrupt.h
• linux/io.h
• linux/idr.h
• mchp_pci1xxxx_gp.h

Detected Declarations

• struct aux_bus_device
• function gp_auxiliary_device_release
• function gp_aux_bus_probe
• function gp_aux_bus_remove

Annotated Snippet

static struct pci_driver pci1xxxx_gp_driver = {
	.name = "PCI1xxxxGP",
	.id_table = pci1xxxx_tbl,
	.probe = gp_aux_bus_probe,
	.remove = gp_aux_bus_remove,
};

module_pci_driver(pci1xxxx_gp_driver);

MODULE_DESCRIPTION("Microchip Technology Inc. PCI1xxxx GP expander");
MODULE_AUTHOR("Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/mfd/core.h`, `linux/module.h`, `linux/pci.h`, `linux/spinlock.h`, `linux/gpio/driver.h`, `linux/interrupt.h`, `linux/io.h`, `linux/idr.h`.
• Detected declarations: `struct aux_bus_device`, `function gp_auxiliary_device_release`, `function gp_aux_bus_probe`, `function gp_aux_bus_remove`.
• Atlas domain: Driver Families / drivers/misc.
• Implementation status: pattern 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.