u8 force_crystal_mode;
};
-#if IS_ENABLED(CONFIG_DVB_TUNER_DIB0090)
+#if IS_REACHABLE(CONFIG_DVB_TUNER_DIB0090)
extern struct dvb_frontend *dib0090_register(struct dvb_frontend *fe, struct i2c_adapter *i2c, const struct dib0090_config *config);
extern struct dvb_frontend *dib0090_fw_register(struct dvb_frontend *fe, struct i2c_adapter *i2c, const struct dib0090_config *config);
extern void dib0090_dcc_freq(struct dvb_frontend *fe, u8 fast);