drivers/cpuidle/cpuidle-psci.c

File Facts

System

Linux kernel

Corpus path

drivers/cpuidle/cpuidle-psci.c

Extension

.c

Size

11648 bytes

Lines

493

Domain

Driver Families

Bucket

drivers/cpuidle

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/cpuhotplug.h
• linux/cpu_cooling.h
• linux/cpuidle.h
• linux/cpumask.h
• linux/cpu_pm.h
• linux/kernel.h
• linux/module.h
• linux/of.h
• linux/device/faux.h
• linux/psci.h
• linux/pm_domain.h
• linux/pm_runtime.h
• linux/slab.h
• linux/string.h
• linux/syscore_ops.h
• asm/cpuidle.h
• trace/events/power.h
• cpuidle-psci.h
• dt_idle_states.h
• dt_idle_genpd.h

Detected Declarations

• struct psci_cpuidle_data
• struct psci_cpuidle_domain_state
• function psci_set_domain_state
• function psci_clear_domain_state
• function __psci_enter_domain_idle_state
• function psci_enter_domain_idle_state
• function psci_enter_s2idle_domain_idle_state
• function psci_idle_cpuhp_up
• function psci_idle_cpuhp_down
• function psci_idle_syscore_switch
• function for_each_possible_cpu
• function psci_idle_syscore_suspend
• function psci_idle_syscore_resume
• function psci_idle_init_syscore
• function psci_idle_init_cpuhp
• function psci_enter_idle_state
• function psci_dt_parse_state_node
• function psci_dt_cpu_init_topology
• function psci_dt_cpu_init_idle
• function psci_cpu_init_idle
• function psci_cpu_deinit_idle
• function psci_idle_init_cpu
• function psci_cpuidle_probe
• function for_each_present_cpu
• function dt_idle_state_present
• function psci_idle_init
• module init psci_idle_init

Annotated Snippet

device_initcall(psci_idle_init);

Annotation

• Immediate include surface: `linux/cpuhotplug.h`, `linux/cpu_cooling.h`, `linux/cpuidle.h`, `linux/cpumask.h`, `linux/cpu_pm.h`, `linux/kernel.h`, `linux/module.h`, `linux/of.h`.
• Detected declarations: `struct psci_cpuidle_data`, `struct psci_cpuidle_domain_state`, `function psci_set_domain_state`, `function psci_clear_domain_state`, `function __psci_enter_domain_idle_state`, `function psci_enter_domain_idle_state`, `function psci_enter_s2idle_domain_idle_state`, `function psci_idle_cpuhp_up`, `function psci_idle_cpuhp_down`, `function psci_idle_syscore_switch`.
• Atlas domain: Driver Families / drivers/cpuidle.
• 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.