drivers/pinctrl/pinmux.h

File Facts

System

Linux kernel

Corpus path

drivers/pinctrl/pinmux.h

Extension

.h

Size

4627 bytes

Lines

182

Domain

Driver Families

Bucket

drivers/pinctrl

Inferred role

Driver Families: implementation source

Status

source 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct dentry
• struct seq_file
• struct pinctrl_dev
• struct pinctrl_gpio_range
• struct pinctrl_map
• struct pinctrl_setting
• struct function_desc
• function pinmux_check_ops
• function pinmux_validate_map
• function pinmux_can_be_used_for_gpio
• function pinmux_request_gpio
• function pinmux_free_gpio
• function pinmux_map_to_setting
• function pinmux_free_setting
• function pinmux_disable_setting
• function pinmux_show_map
• function pinmux_generic_free_functions

Annotated Snippet

struct function_desc {
	const struct pinfunction *func;
	void *data;
};

int pinmux_generic_get_function_count(struct pinctrl_dev *pctldev);

const char *
pinmux_generic_get_function_name(struct pinctrl_dev *pctldev,
				 unsigned int selector);

int pinmux_generic_get_function_groups(struct pinctrl_dev *pctldev,
				       unsigned int selector,
				       const char * const **groups,
				       unsigned int * const ngroups);

const struct function_desc *
pinmux_generic_get_function(struct pinctrl_dev *pctldev, unsigned int selector);

int pinmux_generic_add_function(struct pinctrl_dev *pctldev,
				const char *name,
				const char * const *groups,
				unsigned int const ngroups,
				void *data);

int pinmux_generic_add_pinfunction(struct pinctrl_dev *pctldev,
				   const struct pinfunction *func, void *data);

int pinmux_generic_remove_function(struct pinctrl_dev *pctldev,
				   unsigned int selector);

void pinmux_generic_free_functions(struct pinctrl_dev *pctldev);

bool pinmux_generic_function_is_gpio(struct pinctrl_dev *pctldev,
				     unsigned int selector);

#else

static inline void pinmux_generic_free_functions(struct pinctrl_dev *pctldev)
{
}

#endif /* CONFIG_GENERIC_PINMUX_FUNCTIONS */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct dentry`, `struct seq_file`, `struct pinctrl_dev`, `struct pinctrl_gpio_range`, `struct pinctrl_map`, `struct pinctrl_setting`, `struct function_desc`, `function pinmux_check_ops`, `function pinmux_validate_map`, `function pinmux_can_be_used_for_gpio`.
• Atlas domain: Driver Families / drivers/pinctrl.
• Implementation status: source 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.