1 #ifndef SI21XX_H 2 #define SI21XX_H 3 4 #include <linux/kconfig.h> 5 #include <linux/dvb/frontend.h> 6 #include "dvb_frontend.h" 7 8 struct 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) 17 extern struct dvb_frontend *si21xx_attach(const struct si21xx_config *config, 18 struct i2c_adapter *i2c); 19 #else 20 static 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 #endif 27 28 static 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 #endif 38