linux/drivers/media/dvb-frontends/si21xx.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef SI21XX_H
#define SI21XX_H

#include <linux/dvb/frontend.h>
#include <media/dvb_frontend.h>

struct si21xx_config { … };

#if IS_REACHABLE(CONFIG_DVB_SI21XX)
extern struct dvb_frontend *si21xx_attach(const struct si21xx_config *config,
						struct i2c_adapter *i2c);
#else
static inline struct dvb_frontend *si21xx_attach(
		const struct si21xx_config *config, struct i2c_adapter *i2c)
{
	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
	return NULL;
}
#endif

static inline int si21xx_writeregister(struct dvb_frontend *fe, u8 reg, u8 val)
{ … }

#endif