include/linux/gpio/regmap.h

File Facts

System

Linux kernel

Corpus path

include/linux/gpio/regmap.h

Extension

.h

Size

4905 bytes

Lines

125

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• struct device
• struct fwnode_handle
• struct gpio_regmap
• struct gpio_chip
• struct irq_domain
• struct regmap
• struct gpio_regmap_config

Annotated Snippet

struct gpio_regmap_config {
	struct device *parent;
	struct regmap *regmap;
	struct fwnode_handle *fwnode;

	const char *label;
	int ngpio;
	const char *const *names;

	unsigned int reg_dat_base;
	unsigned int reg_set_base;
	unsigned int reg_clr_base;
	unsigned int reg_dir_in_base;
	unsigned int reg_dir_out_base;
	int reg_stride;
	int ngpio_per_reg;
	struct irq_domain *irq_domain;
	unsigned long *fixed_direction_mask;
	unsigned long *fixed_direction_output;

#ifdef CONFIG_REGMAP_IRQ
	struct regmap_irq_chip *regmap_irq_chip;
	int regmap_irq_line;
	unsigned long regmap_irq_flags;
#endif

	int (*reg_mask_xlate)(struct gpio_regmap *gpio, unsigned int base,
			      unsigned int offset, unsigned int *reg,
			      unsigned int *mask);

	int (*init_valid_mask)(struct gpio_chip *gc,
			       unsigned long *valid_mask,
			       unsigned int ngpios);

	void *drvdata;
};

struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config);
void gpio_regmap_unregister(struct gpio_regmap *gpio);
struct gpio_regmap *devm_gpio_regmap_register(struct device *dev,
					      const struct gpio_regmap_config *config);
void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio);

#endif /* _LINUX_GPIO_REGMAP_H */

Annotation

• Detected declarations: `struct device`, `struct fwnode_handle`, `struct gpio_regmap`, `struct gpio_chip`, `struct irq_domain`, `struct regmap`, `struct gpio_regmap_config`.
• Atlas domain: Core OS / Core Kernel Interface.
• 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.