drivers/media/dvb-frontends/s921.h

File Facts

System

Linux kernel

Corpus path

drivers/media/dvb-frontends/s921.h

Extension

.h

Size

955 bytes

Lines

39

Domain

Driver Families

Bucket

drivers/media

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/dvb/frontend.h

Detected Declarations

• struct s921_config
• function s921_get_tuner_i2c_adapter

Annotated Snippet

struct s921_config {
	/* the demodulator's i2c address */
	u8 demod_address;
};

#if IS_REACHABLE(CONFIG_DVB_S921)
extern struct dvb_frontend *s921_attach(const struct s921_config *config,
					   struct i2c_adapter *i2c);
extern struct i2c_adapter *s921_get_tuner_i2c_adapter(struct dvb_frontend *);
#else
static inline struct dvb_frontend *s921_attach(
	const struct s921_config *config, struct i2c_adapter *i2c)
{
	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
	return NULL;
}
static inline struct i2c_adapter *
	s921_get_tuner_i2c_adapter(struct dvb_frontend *fe)
{
	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
	return NULL;
}
#endif

#endif /* S921_H */

Annotation

• Immediate include surface: `linux/dvb/frontend.h`.
• Detected declarations: `struct s921_config`, `function s921_get_tuner_i2c_adapter`.
• Atlas domain: Driver Families / drivers/media.
• 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.