include/linux/i2c-algo-pca.h

File Facts

System

Linux kernel

Corpus path

include/linux/i2c-algo-pca.h

Extension

.h

Size

2959 bytes

Lines

88

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 pca_i2c_bus_settings
• struct i2c_algo_pca_data

Annotated Snippet

struct pca_i2c_bus_settings {
	int mode;
	int tlow;
	int thi;
	int clock_freq;
};

struct i2c_algo_pca_data {
	void 				*data;	/* private low level data */
	void (*write_byte)		(void *data, int reg, int val);
	int  (*read_byte)		(void *data, int reg);
	int  (*wait_for_completion_cb)	(void *data);
	void (*reset_chip)		(void *data);
	/* For PCA9564, use one of the predefined frequencies:
	 * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000
	 * For PCA9665, use the frequency you want here. */
	unsigned int			i2c_clock;
	unsigned int			chip;
	struct pca_i2c_bus_settings		bus_settings;
};

int i2c_pca_add_bus(struct i2c_adapter *);
int i2c_pca_add_numbered_bus(struct i2c_adapter *);

#endif /* _LINUX_I2C_ALGO_PCA_H */

Annotation

• Detected declarations: `struct pca_i2c_bus_settings`, `struct i2c_algo_pca_data`.
• 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.