drivers/media/dvb-frontends/ves1820.h

Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/ves1820.h

File Facts

System
Linux kernel
Corpus path
drivers/media/dvb-frontends/ves1820.h
Extension
.h
Size
977 bytes
Lines
45
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

VES1820  - Single Chip Cable Channel Receiver driver module

    Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>

*/

#ifndef VES1820_H
#define VES1820_H

#include <linux/dvb/frontend.h>

#define VES1820_SELAGC_PWM 0
#define VES1820_SELAGC_SIGNAMPERR 1

struct ves1820_config
{
	/* the demodulator's i2c address */
	u8 demod_address;

	/* value of XIN to use */
	u32 xin;

	/* does inversion need inverted? */
	u8 invert:1;

	/* SELAGC control */
	u8 selagc:1;
};

#if IS_REACHABLE(CONFIG_DVB_VES1820)
extern struct dvb_frontend* ves1820_attach(const struct ves1820_config* config,
					   struct i2c_adapter* i2c, u8 pwm);
#else
static inline struct dvb_frontend* ves1820_attach(const struct ves1820_config* config,
					   struct i2c_adapter* i2c, u8 pwm)
{
	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
	return NULL;
}
#endif // CONFIG_DVB_VES1820

#endif // VES1820_H

Annotation

Implementation Notes