drivers/iio/imu/inv_icm45600/inv_icm45600_buffer.h

Source file repositories/reference/linux-study-clean/drivers/iio/imu/inv_icm45600/inv_icm45600_buffer.h

File Facts

System
Linux kernel
Corpus path
drivers/iio/imu/inv_icm45600/inv_icm45600_buffer.h
Extension
.h
Size
2713 bytes
Lines
102
Domain
Driver Families
Bucket
drivers/iio
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 inv_icm45600_fifo {
	unsigned int on;
	unsigned int en;
	u32 period;
	struct {
		unsigned int gyro;
		unsigned int accel;
		unsigned int eff_gyro;
		unsigned int eff_accel;
	} watermark;
	size_t count;
	struct {
		size_t gyro;
		size_t accel;
		size_t total;
	} nb;
	u8 *data;
};

/* FIFO data packet */
struct inv_icm45600_fifo_sensor_data {
	__le16 x;
	__le16 y;
	__le16 z;
} __packed;
#define INV_ICM45600_DATA_INVALID		S16_MIN

static inline bool
inv_icm45600_fifo_is_data_valid(const struct inv_icm45600_fifo_sensor_data *s)
{
	s16 x, y, z;

	x = le16_to_cpu(s->x);
	y = le16_to_cpu(s->y);
	z = le16_to_cpu(s->z);

	return (x != INV_ICM45600_DATA_INVALID ||
		y != INV_ICM45600_DATA_INVALID ||
		z != INV_ICM45600_DATA_INVALID);
}

ssize_t inv_icm45600_fifo_decode_packet(const void *packet,
					const struct inv_icm45600_fifo_sensor_data **accel,
					const struct inv_icm45600_fifo_sensor_data **gyro,
					const s8 **temp,
					const __le16 **timestamp, unsigned int *odr);

extern const struct iio_buffer_setup_ops inv_icm45600_buffer_ops;

int inv_icm45600_buffer_init(struct inv_icm45600_state *st);

void inv_icm45600_buffer_update_fifo_period(struct inv_icm45600_state *st);

int inv_icm45600_buffer_set_fifo_en(struct inv_icm45600_state *st,
				    unsigned int fifo_en);

int inv_icm45600_buffer_update_watermark(struct inv_icm45600_state *st);

int inv_icm45600_buffer_fifo_read(struct inv_icm45600_state *st,
				  unsigned int max);

int inv_icm45600_buffer_fifo_parse(struct inv_icm45600_state *st);

int inv_icm45600_buffer_hwfifo_flush(struct inv_icm45600_state *st,
				     unsigned int count);

#endif

Annotation

Implementation Notes