drivers/mfd/altera-sysmgr.c

File Facts

System

Linux kernel

Corpus path

drivers/mfd/altera-sysmgr.c

Extension

.c

Size

5085 bytes

Lines

204

Domain

Driver Families

Bucket

drivers/mfd

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/arm-smccc.h
• linux/err.h
• linux/io.h
• linux/mfd/altera-sysmgr.h
• linux/mfd/syscon.h
• linux/module.h
• linux/of.h
• linux/platform_device.h
• linux/regmap.h
• linux/slab.h

Detected Declarations

• struct altr_sysmgr
• function s10_protected_reg_write
• function s10_protected_reg_read
• function probe
• function sysmgr_probe
• function altr_sysmgr_init
• function altr_sysmgr_exit
• module init altr_sysmgr_init
• export altr_sysmgr_regmap_lookup_by_phandle

Annotated Snippet

core_initcall(altr_sysmgr_init);

static void __exit altr_sysmgr_exit(void)
{
	platform_driver_unregister(&altr_sysmgr_driver);
}
module_exit(altr_sysmgr_exit);

MODULE_AUTHOR("Thor Thayer <>");
MODULE_DESCRIPTION("SOCFPGA System Manager driver");

Annotation

• Immediate include surface: `linux/arm-smccc.h`, `linux/err.h`, `linux/io.h`, `linux/mfd/altera-sysmgr.h`, `linux/mfd/syscon.h`, `linux/module.h`, `linux/of.h`, `linux/platform_device.h`.
• Detected declarations: `struct altr_sysmgr`, `function s10_protected_reg_write`, `function s10_protected_reg_read`, `function probe`, `function sysmgr_probe`, `function altr_sysmgr_init`, `function altr_sysmgr_exit`, `module init altr_sysmgr_init`, `export altr_sysmgr_regmap_lookup_by_phandle`.
• Atlas domain: Driver Families / drivers/mfd.
• 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.