drivers/media/dvb-frontends/mb86a20s.h

   1 /*
   2  *   Fujitsu mb86a20s driver
   3  *
   4  *   Copyright (C) 2010 Mauro Carvalho Chehab
   5  *
   6  *   This program is free software; you can redistribute it and/or
   7  *   modify it under the terms of the GNU General Public License as
   8  *   published by the Free Software Foundation version 2.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *   General Public License for more details.
  14  */
  15
  16 #ifndef MB86A20S_H
  17 #define MB86A20S_H
  18
  19 #include <linux/dvb/frontend.h>
  20
  21 /**
  22  * struct mb86a20s_config - Define the per-device attributes of the frontend
  23  *
  24  * @fclk:               Clock frequency. If zero, assumes the default
  25  *                      (32.57142 Mhz)
  26  * @demod_address:      the demodulator's i2c address
  27  * @is_serial:          if true, TS is serial. Otherwise, TS is parallel
  28  */
  29 struct mb86a20s_config {
  30         u32     fclk;
  31         u8      demod_address;
  32         bool    is_serial;
  33 };
  34
  35 #if IS_REACHABLE(CONFIG_DVB_MB86A20S)
  36 /**
  37  * Attach a mb86a20s demod
  38  *
  39  * @config: pointer to &struct mb86a20s_config with demod configuration.
  40  * @i2c: i2c adapter to use.
  41  *
  42  * return: FE pointer on success, NULL on failure.
  43  */
  44 extern struct dvb_frontend *mb86a20s_attach(const struct mb86a20s_config *config,
  45                                            struct i2c_adapter *i2c);
  46
  47 #else
  48 static inline struct dvb_frontend *mb86a20s_attach(
  49         const struct mb86a20s_config *config, struct i2c_adapter *i2c)
  50 {
  51         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  52         return NULL;
  53 }
  54 #endif
  55
  56 #endif /* MB86A20S */