drivers/cpufreq/apple-soc-cpufreq.c

File Facts

System

Linux kernel

Corpus path

drivers/cpufreq/apple-soc-cpufreq.c

Extension

.c

Size

10227 bytes

Lines

374

Domain

Driver Families

Bucket

drivers/cpufreq

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/bitfield.h
• linux/bitops.h
• linux/cpu.h
• linux/cpufreq.h
• linux/cpumask.h
• linux/delay.h
• linux/err.h
• linux/io.h
• linux/iopoll.h
• linux/module.h
• linux/of.h
• linux/of_address.h
• linux/pm_opp.h
• linux/slab.h

Detected Declarations

• struct apple_soc_cpufreq_info
• struct apple_cpu_priv
• function apple_soc_cpufreq_get_rate
• function apple_soc_cpufreq_set_target
• function apple_soc_cpufreq_fast_switch
• function apple_soc_cpufreq_find_cluster
• function apple_soc_cpufreq_init
• function apple_soc_cpufreq_exit
• function apple_soc_cpufreq_module_init
• function apple_soc_cpufreq_module_exit
• module init apple_soc_cpufreq_module_init

Annotated Snippet

module_init(apple_soc_cpufreq_module_init);

static void __exit apple_soc_cpufreq_module_exit(void)
{
	cpufreq_unregister_driver(&apple_soc_cpufreq_driver);
}
module_exit(apple_soc_cpufreq_module_exit);

MODULE_DEVICE_TABLE(of, apple_soc_cpufreq_of_match);
MODULE_AUTHOR("Hector Martin <marcan@marcan.st>");
MODULE_DESCRIPTION("Apple SoC CPU cluster DVFS driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/bitfield.h`, `linux/bitops.h`, `linux/cpu.h`, `linux/cpufreq.h`, `linux/cpumask.h`, `linux/delay.h`, `linux/err.h`, `linux/io.h`.
• Detected declarations: `struct apple_soc_cpufreq_info`, `struct apple_cpu_priv`, `function apple_soc_cpufreq_get_rate`, `function apple_soc_cpufreq_set_target`, `function apple_soc_cpufreq_fast_switch`, `function apple_soc_cpufreq_find_cluster`, `function apple_soc_cpufreq_init`, `function apple_soc_cpufreq_exit`, `function apple_soc_cpufreq_module_init`, `function apple_soc_cpufreq_module_exit`.
• Atlas domain: Driver Families / drivers/cpufreq.
• 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.