drivers/platform/x86/intel/tpmi_power_domains.c

File Facts

System

Linux kernel

Corpus path

drivers/platform/x86/intel/tpmi_power_domains.c

Extension

.c

Size

6442 bytes

Lines

266

Domain

Driver Families

Bucket

drivers/platform

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/cleanup.h
• linux/cpuhotplug.h
• linux/cpumask.h
• linux/errno.h
• linux/export.h
• linux/hashtable.h
• linux/module.h
• linux/mutex.h
• linux/overflow.h
• linux/slab.h
• linux/topology.h
• linux/types.h
• asm/cpu_device_id.h
• asm/intel-family.h
• asm/msr.h
• tpmi_power_domains.h

Detected Declarations

• struct tpmi_cpu_info
• function tpmi_domain_is_valid
• function tpmi_get_linux_cpu_number
• function tpmi_get_punit_core_number
• function tpmi_get_power_domain_id
• function tpmi_get_linux_die_id
• function tpmi_get_logical_id
• function tpmi_cpu_online
• function tpmi_init
• function tpmi_exit
• module init tpmi_init

Annotated Snippet

module_init(tpmi_init)

static void __exit tpmi_exit(void)
{
	cpuhp_remove_state(tpmi_hp_state);
	kfree(tpmi_power_domain_mask);
	kfree(domain_die_map);
}
module_exit(tpmi_exit)

MODULE_DESCRIPTION("TPMI Power Domains Mapping");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/bitfield.h`, `linux/cleanup.h`, `linux/cpuhotplug.h`, `linux/cpumask.h`, `linux/errno.h`, `linux/export.h`, `linux/hashtable.h`, `linux/module.h`.
• Detected declarations: `struct tpmi_cpu_info`, `function tpmi_domain_is_valid`, `function tpmi_get_linux_cpu_number`, `function tpmi_get_punit_core_number`, `function tpmi_get_power_domain_id`, `function tpmi_get_linux_die_id`, `function tpmi_get_logical_id`, `function tpmi_cpu_online`, `function tpmi_init`, `function tpmi_exit`.
• Atlas domain: Driver Families / drivers/platform.
• 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.