drivers/media/dvb-frontends/si21xx.h

   1 #ifndef SI21XX_H
   2 #define SI21XX_H
   3
   4 #include <linux/dvb/frontend.h>
   5 #include "dvb_frontend.h"
   6
   7 struct si21xx_config {
   8         /* the demodulator's i2c address */
   9         u8 demod_address;
  10
  11         /* minimum delay before retuning */
  12         int min_delay_ms;
  13 };
  14
  15 #if IS_REACHABLE(CONFIG_DVB_SI21XX)
  16 extern struct dvb_frontend *si21xx_attach(const struct si21xx_config *config,
  17                                                 struct i2c_adapter *i2c);
  18 #else
  19 static inline struct dvb_frontend *si21xx_attach(
  20                 const struct si21xx_config *config, struct i2c_adapter *i2c)
  21 {
  22         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  23         return NULL;
  24 }
  25 #endif
  26
  27 static inline int si21xx_writeregister(struct dvb_frontend *fe, u8 reg, u8 val)
  28 {
  29         int r = 0;
  30         u8 buf[] = {reg, val};
  31         if (fe->ops.write)
  32                 r = fe->ops.write(fe, buf, 2);
  33         return r;
  34 }
  35
  36 #endif