drivers/fsi/fsi-master.h

Source file repositories/reference/linux-study-clean/drivers/fsi/fsi-master.h

File Facts

System
Linux kernel
Corpus path
drivers/fsi/fsi-master.h
Extension
.h
Size
5956 bytes
Lines
162
Domain
Driver Families
Bucket
drivers/fsi
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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct fsi_master {
	struct device	dev;
	int		idx;
	int		n_links;
	int		flags;
	struct mutex	scan_lock;
	int		(*read)(struct fsi_master *, int link, uint8_t id,
				uint32_t addr, void *val, size_t size);
	int		(*write)(struct fsi_master *, int link, uint8_t id,
				uint32_t addr, const void *val, size_t size);
	int		(*term)(struct fsi_master *, int link, uint8_t id);
	int		(*send_break)(struct fsi_master *, int link);
	int		(*link_enable)(struct fsi_master *, int link,
				       bool enable);
	int		(*link_config)(struct fsi_master *, int link,
				       u8 t_send_delay, u8 t_echo_delay);
};

#define to_fsi_master(d) container_of(d, struct fsi_master, dev)

/**
 * fsi_master registration & lifetime: the fsi_master_register() and
 * fsi_master_unregister() functions will take ownership of the master, and
 * ->dev in particular. The registration path performs a get_device(), which
 * takes the first reference on the device. Similarly, the unregistration path
 * performs a put_device(), which may well drop the last reference.
 *
 * This means that master implementations *may* need to hold their own
 * reference (via get_device()) on master->dev. In particular, if the device's
 * ->release callback frees the fsi_master, then fsi_master_unregister will
 * invoke this free if no other reference is held.
 *
 * The same applies for the error path of fsi_master_register; if the call
 * fails, dev->release will have been invoked.
 */
extern int fsi_master_register(struct fsi_master *master);
extern void fsi_master_unregister(struct fsi_master *master);

extern int fsi_master_rescan(struct fsi_master *master);

#endif /* DRIVERS_FSI_MASTER_H */

Annotation

Implementation Notes