drivers/cpufreq/loongson2_cpufreq.c
Source file repositories/reference/linux-study-clean/drivers/cpufreq/loongson2_cpufreq.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/cpufreq/loongson2_cpufreq.c- Extension
.c- Size
- 4220 bytes
- Lines
- 180
- 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.
- Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/cpufreq.hlinux/module.hlinux/err.hlinux/delay.hlinux/platform_device.hasm/idle.hasm/mach-loongson2ef/loongson.h
Detected Declarations
function loongson2_cpu_freq_notifierfunction loongson2_cpufreq_targetfunction loongson2_cpufreq_cpu_initfunction loongson2_cpu_waitfunction cpufreq_initfunction cpufreq_exitmodule init cpufreq_init
Annotated Snippet
module_init(cpufreq_init);
module_exit(cpufreq_exit);
module_param(nowait, uint, 0644);
MODULE_PARM_DESC(nowait, "Disable Loongson-2F specific wait");
MODULE_AUTHOR("Yanhua <yanh@lemote.com>");
MODULE_DESCRIPTION("cpufreq driver for Loongson2F");
MODULE_LICENSE("GPL");Annotation
- Immediate include surface: `linux/cpufreq.h`, `linux/module.h`, `linux/err.h`, `linux/delay.h`, `linux/platform_device.h`, `asm/idle.h`, `asm/mach-loongson2ef/loongson.h`.
- Detected declarations: `function loongson2_cpu_freq_notifier`, `function loongson2_cpufreq_target`, `function loongson2_cpufreq_cpu_init`, `function loongson2_cpu_wait`, `function cpufreq_init`, `function cpufreq_exit`, `module init cpufreq_init`.
- Atlas domain: Driver Families / drivers/cpufreq.
- Implementation status: integration implementation candidate.
- Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
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.