si21xx.h

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#ifndef SI21XX_H
#define SI21XX_H

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

struct si21xx_config {
    /* the demodulator's i2c address */
    u8 demod_address;

    /* minimum delay before retuning */
    int min_delay_ms;
};

#if defined(CONFIG_DVB_SI21XX) || \
        (defined(CONFIG_DVB_SI21XX_MODULE) && defined(MODULE))
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)
{
    int r = 0;
    u8 buf[] = {reg, val};
    if (fe->ops.write)
        r = fe->ops.write(fe, buf, 2);
    return r;
}

#endif