drivers/cpufreq/pxa3xx-cpufreq.c

File Facts

System

Linux kernel

Corpus path

drivers/cpufreq/pxa3xx-cpufreq.c

Extension

.c

Size

6589 bytes

Lines

235

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/kernel.h
• linux/module.h
• linux/sched.h
• linux/init.h
• linux/cpufreq.h
• linux/soc/pxa/cpu.h
• linux/clk/pxa.h
• linux/slab.h
• linux/io.h

Detected Declarations

• struct pxa3xx_freq_info
• function setup_freqs_table
• function __update_core_freq
• function __update_bus_freq
• function pxa3xx_cpufreq_get
• function pxa3xx_cpufreq_set
• function pxa3xx_cpufreq_init
• function cpufreq_init
• function cpufreq_exit
• module init cpufreq_init

Annotated Snippet

module_init(cpufreq_init);

static void __exit cpufreq_exit(void)
{
	cpufreq_unregister_driver(&pxa3xx_cpufreq_driver);
}
module_exit(cpufreq_exit);

MODULE_DESCRIPTION("CPU frequency scaling driver for PXA3xx");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/sched.h`, `linux/init.h`, `linux/cpufreq.h`, `linux/soc/pxa/cpu.h`, `linux/clk/pxa.h`, `linux/slab.h`.
• Detected declarations: `struct pxa3xx_freq_info`, `function setup_freqs_table`, `function __update_core_freq`, `function __update_bus_freq`, `function pxa3xx_cpufreq_get`, `function pxa3xx_cpufreq_set`, `function pxa3xx_cpufreq_init`, `function cpufreq_init`, `function cpufreq_exit`, `module init cpufreq_init`.
• 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.