drivers/gpio/gpiolib-of.h

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpiolib-of.h

Extension

.h

Size

1656 bytes

Lines

62

Domain

Driver Families

Bucket

drivers/gpio

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/err.h
• linux/types.h
• linux/notifier.h

Detected Declarations

• struct device_node
• struct fwnode_handle
• struct fwnode_reference_args
• struct gpio_chip
• struct gpio_desc
• struct gpio_device
• function of_gpiochip_add
• function of_gpiochip_remove
• function of_gpio_count
• function of_gpiochip_get_lflags

Annotated Snippet

static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; }
static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
static inline bool of_gpiochip_instance_match(struct gpio_chip *gc,
					      unsigned int index)
{
	return false;
}
static inline int of_gpio_count(const struct fwnode_handle *fwnode,
				const char *con_id)
{
	return 0;
}
static inline int of_gpiochip_get_lflags(struct gpio_chip *chip,
					 struct fwnode_reference_args *gpiospec,
					 unsigned long *lflags)
{
	return -ENOENT;
}
#endif /* CONFIG_OF_GPIO */

extern struct notifier_block gpio_of_notifier;

#endif /* GPIOLIB_OF_H */

Annotation

• Immediate include surface: `linux/err.h`, `linux/types.h`, `linux/notifier.h`.
• Detected declarations: `struct device_node`, `struct fwnode_handle`, `struct fwnode_reference_args`, `struct gpio_chip`, `struct gpio_desc`, `struct gpio_device`, `function of_gpiochip_add`, `function of_gpiochip_remove`, `function of_gpio_count`, `function of_gpiochip_get_lflags`.
• Atlas domain: Driver Families / drivers/gpio.
• 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.