drivers/cpufreq/sun50i-cpufreq-nvmem.c

File Facts

System

Linux kernel

Corpus path

drivers/cpufreq/sun50i-cpufreq-nvmem.c

Extension

.c

Size

8506 bytes

Lines

371

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/arm-smccc.h
• linux/cpu.h
• linux/module.h
• linux/nvmem-consumer.h
• linux/of.h
• linux/platform_device.h
• linux/pm_opp.h
• linux/slab.h

Detected Declarations

• struct sunxi_cpufreq_data
• function sun50i_h6_efuse_xlate
• function sun50i_a100_efuse_xlate
• function get_soc_id_revision
• function sun50i_h616_efuse_xlate
• function dt_has_supported_hw
• function for_each_child_of_node_scoped
• function sun50i_cpufreq_get_efuse
• function sun50i_cpufreq_nvmem_probe
• function for_each_present_cpu
• function sun50i_cpufreq_nvmem_remove
• function sun50i_cpufreq_init
• function sun50i_cpufreq_exit
• module init sun50i_cpufreq_init

Annotated Snippet

module_init(sun50i_cpufreq_init);

static void __exit sun50i_cpufreq_exit(void)
{
	platform_device_unregister(sun50i_cpufreq_pdev);
	platform_driver_unregister(&sun50i_cpufreq_driver);
}
module_exit(sun50i_cpufreq_exit);

MODULE_DESCRIPTION("Sun50i-h6 cpufreq driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/arm-smccc.h`, `linux/cpu.h`, `linux/module.h`, `linux/nvmem-consumer.h`, `linux/of.h`, `linux/platform_device.h`, `linux/pm_opp.h`, `linux/slab.h`.
• Detected declarations: `struct sunxi_cpufreq_data`, `function sun50i_h6_efuse_xlate`, `function sun50i_a100_efuse_xlate`, `function get_soc_id_revision`, `function sun50i_h616_efuse_xlate`, `function dt_has_supported_hw`, `function for_each_child_of_node_scoped`, `function sun50i_cpufreq_get_efuse`, `function sun50i_cpufreq_nvmem_probe`, `function for_each_present_cpu`.
• 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.