drivers/powercap/arm_scmi_powercap.c

File Facts

System

Linux kernel

Corpus path

drivers/powercap/arm_scmi_powercap.c

Extension

.c

Size

14990 bytes

Lines

551

Domain

Driver Families

Bucket

drivers/powercap

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/device.h
• linux/math.h
• linux/limits.h
• linux/list.h
• linux/module.h
• linux/powercap.h
• linux/scmi_protocol.h
• linux/slab.h

Detected Declarations

• struct scmi_powercap_zone
• struct scmi_powercap_root
• function scmi_powercap_zone_release
• function scmi_powercap_get_max_power_range_uw
• function scmi_powercap_get_power_uw
• function scmi_powercap_zone_enable_set
• function scmi_powercap_zone_enable_get
• function scmi_powercap_normalize_cap
• function scmi_powercap_set_power_limit_uw
• function scmi_powercap_get_power_limit_uw
• function scmi_powercap_normalize_time
• function scmi_powercap_set_time_window_us
• function scmi_powercap_get_time_window_us
• function scmi_powercap_get_max_power_uw
• function scmi_powercap_get_min_power_uw
• function scmi_powercap_get_max_time_window_us
• function scmi_powercap_get_min_time_window_us
• function scmi_powercap_unregister_all_zones
• function scmi_powercap_get_zone_height
• function scmi_powercap_get_parent_zone
• function scmi_powercap_register_zone
• function scmi_zones_register
• function scmi_powercap_probe
• function scmi_powercap_remove
• function scmi_powercap_init
• function scmi_powercap_exit
• module init scmi_powercap_init

Annotated Snippet

module_init(scmi_powercap_init);

static void __exit scmi_powercap_exit(void)
{
	scmi_unregister(&scmi_powercap_driver);

	powercap_unregister_control_type(scmi_top_pcntrl);
}
module_exit(scmi_powercap_exit);

MODULE_AUTHOR("Cristian Marussi <cristian.marussi@arm.com>");
MODULE_DESCRIPTION("ARM SCMI Powercap driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/device.h`, `linux/math.h`, `linux/limits.h`, `linux/list.h`, `linux/module.h`, `linux/powercap.h`, `linux/scmi_protocol.h`, `linux/slab.h`.
• Detected declarations: `struct scmi_powercap_zone`, `struct scmi_powercap_root`, `function scmi_powercap_zone_release`, `function scmi_powercap_get_max_power_range_uw`, `function scmi_powercap_get_power_uw`, `function scmi_powercap_zone_enable_set`, `function scmi_powercap_zone_enable_get`, `function scmi_powercap_normalize_cap`, `function scmi_powercap_set_power_limit_uw`, `function scmi_powercap_get_power_limit_uw`.
• Atlas domain: Driver Families / drivers/powercap.
• 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.