drivers/cpufreq/sparc-us2e-cpufreq.c

File Facts

System

Linux kernel

Corpus path

drivers/cpufreq/sparc-us2e-cpufreq.c

Extension

.c

Size

8458 bytes

Lines

352

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/smp.h
• linux/cpufreq.h
• linux/threads.h
• linux/slab.h
• linux/delay.h
• linux/init.h
• asm/asi.h
• asm/timer.h

Detected Declarations

• struct us2e_freq_percpu_info
• function read_hbreg
• function write_hbreg
• function self_refresh_ctl
• function frob_mem_refresh
• function us2e_transition
• function index_to_estar_mode
• function index_to_divisor
• function estar_to_divisor
• function __us2e_freq_get
• function us2e_freq_get
• function __us2e_freq_target
• function us2e_freq_target
• function us2e_freq_cpu_init
• function us2e_freq_cpu_exit
• function us2e_freq_init
• function us2e_freq_exit
• module init us2e_freq_init

Annotated Snippet

module_init(us2e_freq_init);
module_exit(us2e_freq_exit);

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/sched.h`, `linux/smp.h`, `linux/cpufreq.h`, `linux/threads.h`, `linux/slab.h`, `linux/delay.h`.
• Detected declarations: `struct us2e_freq_percpu_info`, `function read_hbreg`, `function write_hbreg`, `function self_refresh_ctl`, `function frob_mem_refresh`, `function us2e_transition`, `function index_to_estar_mode`, `function index_to_divisor`, `function estar_to_divisor`, `function __us2e_freq_get`.
• 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.