drivers/pinctrl/core.c

File Facts

System

Linux kernel

Corpus path

drivers/pinctrl/core.c

Extension

.c

Size

62847 bytes

Lines

2439

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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/array_size.h
• linux/cleanup.h
• linux/debugfs.h
• linux/device.h
• linux/err.h
• linux/export.h
• linux/init.h
• linux/kref.h
• linux/list.h
• linux/seq_file.h
• linux/slab.h
• linux/gpio/consumer.h
• linux/gpio/driver.h
• linux/pinctrl/consumer.h
• linux/pinctrl/devinfo.h
• linux/pinctrl/machine.h
• linux/pinctrl/pinconf.h
• linux/pinctrl/pinctrl.h
• core.h
• devicetree.h
• pinconf.h
• pinmux.h

Detected Declarations

• function pinctrl_provide_dummies
• function get_pinctrl_dev_from_devname
• function list_for_each_entry
• function list_for_each_entry
• function pin_get_from_name
• function pin_get_name
• function pinctrl_free_pindescs
• function pinctrl_register_one_pin
• function pinctrl_register_pins
• function gpio_to_pin
• function pinctrl_match_gpio_range
• function pinctrl_ready_for_gpio_range
• function list_for_each_entry
• function pinctrl_ready_for_gpio_range
• function pinctrl_get_device_gpio_range
• function pinctrl_add_gpio_range
• function pinctrl_add_gpio_ranges
• function pinctrl_get_group_pins
• function pinctrl_find_gpio_range_from_pin_nolock
• function pinctrl_find_gpio_range_from_pin
• function pinctrl_remove_gpio_range
• function pinctrl_generic_get_group_count
• function pinctrl_generic_get_group_name
• function pinctrl_generic_get_group_pins
• function pinctrl_generic_get_group
• function pinctrl_generic_group_name_to_selector
• function pinctrl_generic_add_group
• function pinctrl_generic_remove_group
• function pinctrl_generic_free_groups
• function pinctrl_generic_free_groups
• function pinctrl_gpio_can_use_line
• function pinctrl_gpio_request
• function pinctrl_gpio_free
• function pinctrl_gpio_direction
• function pinctrl_gpio_direction_input
• function pinctrl_gpio_direction_output
• function pinctrl_gpio_set_config
• function pinctrl_gpio_get_config
• function add_setting
• function pinctrl_get
• function pinctrl_free_setting
• function pinctrl_free
• function list_for_each_entry_safe
• function pinctrl_release
• function pinctrl_put
• function pinctrl_lookup_state
• function pinctrl_link_add
• function pinctrl_cond_disable_mux_setting

Annotated Snippet

core_initcall(pinctrl_init);

Annotation

• Immediate include surface: `linux/array_size.h`, `linux/cleanup.h`, `linux/debugfs.h`, `linux/device.h`, `linux/err.h`, `linux/export.h`, `linux/init.h`, `linux/kref.h`.
• Detected declarations: `function pinctrl_provide_dummies`, `function get_pinctrl_dev_from_devname`, `function list_for_each_entry`, `function list_for_each_entry`, `function pin_get_from_name`, `function pin_get_name`, `function pinctrl_free_pindescs`, `function pinctrl_register_one_pin`, `function pinctrl_register_pins`, `function gpio_to_pin`.
• Atlas domain: Driver Families / drivers/pinctrl.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.