#define ISL6421_ISEL1 0x20
#define ISL6421_DCL 0x40
-#if IS_ENABLED(CONFIG_DVB_ISL6421)
+#if IS_REACHABLE(CONFIG_DVB_ISL6421)
/* override_set and override_clear control which system register bits (above) to always set & clear */
extern struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
u8 override_set, u8 override_clear, bool override_tone);