si21xx.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef SI21XX_H
 3#define SI21XX_H
 4
 5#include <linux/dvb/frontend.h>
 6#include <media/dvb_frontend.h>
 7
 8struct si21xx_config {
 9	/* the demodulator's i2c address */
10	u8 demod_address;
11
12	/* minimum delay before retuning */
13	int min_delay_ms;
14};
15
16#if IS_REACHABLE(CONFIG_DVB_SI21XX)
17extern struct dvb_frontend *si21xx_attach(const struct si21xx_config *config,
18						struct i2c_adapter *i2c);
19#else
20static inline struct dvb_frontend *si21xx_attach(
21		const struct si21xx_config *config, struct i2c_adapter *i2c)
22{
23	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
24	return NULL;
25}
26#endif
27
28static inline int si21xx_writeregister(struct dvb_frontend *fe, u8 reg, u8 val)
29{
30	int r = 0;
31	u8 buf[] = {reg, val};
32	if (fe->ops.write)
33		r = fe->ops.write(fe, buf, 2);
34	return r;
35}
36
37#endif