drivers/media/dvb-frontends/si21xx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef SI21XX_H
   3 #define SI21XX_H
   4
   5 #include <linux/dvb/frontend.h>
   6 #include <media/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