drivers/mailbox/hi6220-mailbox.c

File Facts

System

Linux kernel

Corpus path

drivers/mailbox/hi6220-mailbox.c

Extension

.c

Size

9033 bytes

Lines

368

Domain

Driver Families

Bucket

drivers/mailbox

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/device.h
• linux/err.h
• linux/interrupt.h
• linux/io.h
• linux/kfifo.h
• linux/mailbox_controller.h
• linux/module.h
• linux/of.h
• linux/platform_device.h
• linux/slab.h

Detected Declarations

• struct hi6220_mbox_chan
• struct hi6220_mbox
• function mbox_set_state
• function mbox_set_mode
• function hi6220_mbox_last_tx_done
• function hi6220_mbox_send_data
• function hi6220_mbox_interrupt
• function hi6220_mbox_startup
• function hi6220_mbox_shutdown
• function hi6220_mbox_probe
• function hi6220_mbox_init
• function hi6220_mbox_exit
• module init hi6220_mbox_init

Annotated Snippet

core_initcall(hi6220_mbox_init);

static void __exit hi6220_mbox_exit(void)
{
	platform_driver_unregister(&hi6220_mbox_driver);
}
module_exit(hi6220_mbox_exit);

MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
MODULE_DESCRIPTION("Hi6220 mailbox driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/device.h`, `linux/err.h`, `linux/interrupt.h`, `linux/io.h`, `linux/kfifo.h`, `linux/mailbox_controller.h`, `linux/module.h`, `linux/of.h`.
• Detected declarations: `struct hi6220_mbox_chan`, `struct hi6220_mbox`, `function mbox_set_state`, `function mbox_set_mode`, `function hi6220_mbox_last_tx_done`, `function hi6220_mbox_send_data`, `function hi6220_mbox_interrupt`, `function hi6220_mbox_startup`, `function hi6220_mbox_shutdown`, `function hi6220_mbox_probe`.
• Atlas domain: Driver Families / drivers/mailbox.
• 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.