drivers/media/dvb-frontends/s921.h

   1 /*
   2  *   Sharp s921 driver
   3  *
   4  *   Copyright (C) 2009 Mauro Carvalho Chehab
   5  *   Copyright (C) 2009 Douglas Landgraf <dougsland@redhat.com>
   6  *
   7  *   This program is free software; you can redistribute it and/or
   8  *   modify it under the terms of the GNU General Public License as
   9  *   published by the Free Software Foundation version 2.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *   General Public License for more details.
  15  */
  16
  17 #ifndef S921_H
  18 #define S921_H
  19
  20 #include <linux/kconfig.h>
  21 #include <linux/dvb/frontend.h>
  22
  23 struct s921_config {
  24         /* the demodulator's i2c address */
  25         u8 demod_address;
  26 };
  27
  28 #if IS_REACHABLE(CONFIG_DVB_S921)
  29 extern struct dvb_frontend *s921_attach(const struct s921_config *config,
  30                                            struct i2c_adapter *i2c);
  31 extern struct i2c_adapter *s921_get_tuner_i2c_adapter(struct dvb_frontend *);
  32 #else
  33 static inline struct dvb_frontend *s921_attach(
  34         const struct s921_config *config, struct i2c_adapter *i2c)
  35 {
  36         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  37         return NULL;
  38 }
  39 static inline struct i2c_adapter *
  40         s921_get_tuner_i2c_adapter(struct dvb_frontend *fe)
  41 {
  42         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  43         return NULL;
  44 }
  45 #endif
  46
  47 #endif /* S921_H */