drivers/pinctrl/pinctrl-utils.c

Source file repositories/reference/linux-study-clean/drivers/pinctrl/pinctrl-utils.c

File Facts

System: Linux kernel
Corpus path: drivers/pinctrl/pinctrl-utils.c
Extension: .c
Size: 3247 bytes
Lines: 130
Domain: Driver Families
Bucket: drivers/pinctrl
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.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/array_size.h
linux/device.h
linux/export.h
linux/of.h
linux/slab.h
linux/pinctrl/pinctrl.h
core.h
pinctrl-utils.h

Detected Declarations

function Copyright
function pinctrl_utils_add_map_mux
function pinctrl_utils_add_map_configs
function pinctrl_utils_add_config
function pinctrl_utils_free_map
export pinctrl_utils_reserve_map
export pinctrl_utils_add_map_mux
export pinctrl_utils_add_map_configs
export pinctrl_utils_add_config
export pinctrl_utils_free_map

Annotated Snippet

switch (map[i].type) {
		case PIN_MAP_TYPE_CONFIGS_GROUP:
		case PIN_MAP_TYPE_CONFIGS_PIN:
			kfree(map[i].data.configs.configs);
			break;
		default:
			break;
		}
	}
	kfree(map);
}
EXPORT_SYMBOL_GPL(pinctrl_utils_free_map);

Annotation

Immediate include surface: `linux/array_size.h`, `linux/device.h`, `linux/export.h`, `linux/of.h`, `linux/slab.h`, `linux/pinctrl/pinctrl.h`, `core.h`, `pinctrl-utils.h`.
Detected declarations: `function Copyright`, `function pinctrl_utils_add_map_mux`, `function pinctrl_utils_add_map_configs`, `function pinctrl_utils_add_config`, `function pinctrl_utils_free_map`, `export pinctrl_utils_reserve_map`, `export pinctrl_utils_add_map_mux`, `export pinctrl_utils_add_map_configs`, `export pinctrl_utils_add_config`, `export pinctrl_utils_free_map`.
Atlas domain: Driver Families / drivers/pinctrl.
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.