drivers/media/dvb-frontends/lgdt330x.h

Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/lgdt330x.h

File Facts

System
Linux kernel
Corpus path
drivers/media/dvb-frontends/lgdt330x.h
Extension
.h
Size
1693 bytes
Lines
61
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef LGDT330X_H
#define LGDT330X_H

#include <linux/dvb/frontend.h>

typedef enum lg_chip_t {
		UNDEFINED,
		LGDT3302,
		LGDT3303
}lg_chip_type;

/**
 * struct lgdt330x_config - contains lgdt330x configuration
 *
 * @demod_chip:		LG demodulator chip LGDT3302 or LGDT3303
 * @serial_mpeg:	MPEG hardware interface - 0:parallel 1:serial
 * @pll_rf_set:		Callback function to set PLL interface
 * @set_ts_params:	Callback function to set device param for start_dma
 * @clock_polarity_flip:
 *	Flip the polarity of the mpeg data transfer clock using alternate
 *	init data.
 *	This option applies ONLY to LGDT3303 - 0:disabled (default) 1:enabled
 * @get_dvb_frontend:
 *	returns the frontend associated with this I2C client.
 *	Filled by the driver.
 */
struct lgdt330x_config
{
	lg_chip_type demod_chip;
	int serial_mpeg;
	int (*pll_rf_set) (struct dvb_frontend* fe, int index);
	int (*set_ts_params)(struct dvb_frontend* fe, int is_punctured);
	int clock_polarity_flip;

	struct dvb_frontend* (*get_dvb_frontend)(struct i2c_client *);
};

#if IS_REACHABLE(CONFIG_DVB_LGDT330X)
struct dvb_frontend *lgdt330x_attach(const struct lgdt330x_config *config,
				     u8 demod_address,
				     struct i2c_adapter *i2c);
#else
static inline
struct dvb_frontend *lgdt330x_attach(const struct lgdt330x_config *config,
				     u8 demod_address,
				     struct i2c_adapter *i2c)
{
	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
	return NULL;
}
#endif // CONFIG_DVB_LGDT330X

#endif /* LGDT330X_H */

Annotation

Implementation Notes