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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef SI21XX_H3#define SI21XX_H4 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#else20static 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#endif27 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#endif38