drivers/dma/dw/platform.c

File Facts

System

Linux kernel

Corpus path

drivers/dma/dw/platform.c

Extension

.c

Size

5169 bytes

Lines

212

Domain

Driver Families

Bucket

drivers/dma

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/module.h
• linux/device.h
• linux/clk.h
• linux/pm_runtime.h
• linux/platform_device.h
• linux/dmaengine.h
• linux/dma-mapping.h
• linux/of.h
• linux/acpi.h
• internal.h

Detected Declarations

• function Copyright
• function dw_remove
• function dw_shutdown
• function dw_suspend_late
• function dw_resume_early
• function dw_init
• function dw_exit
• module init dw_init

Annotated Snippet

subsys_initcall(dw_init);

static void __exit dw_exit(void)
{
	platform_driver_unregister(&dw_driver);
}
module_exit(dw_exit);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller platform driver");

Annotation

• Immediate include surface: `linux/module.h`, `linux/device.h`, `linux/clk.h`, `linux/pm_runtime.h`, `linux/platform_device.h`, `linux/dmaengine.h`, `linux/dma-mapping.h`, `linux/of.h`.
• Detected declarations: `function Copyright`, `function dw_remove`, `function dw_shutdown`, `function dw_suspend_late`, `function dw_resume_early`, `function dw_init`, `function dw_exit`, `module init dw_init`.
• Atlas domain: Driver Families / drivers/dma.
• 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.