drivers/media/dvb-frontends/isl6421.h

   1 /*
   2  * isl6421.h - driver for lnb supply and control ic ISL6421
   3  *
   4  * Copyright (C) 2006 Andrew de Quincey
   5  * Copyright (C) 2006 Oliver Endriss
   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
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * To obtain the license, point your browser to
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  *
  22  * the project's page is at https://linuxtv.org
  23  */
  24
  25 #ifndef _ISL6421_H
  26 #define _ISL6421_H
  27
  28 #include <linux/dvb/frontend.h>
  29
  30 /* system register bits */
  31 #define ISL6421_OLF1    0x01
  32 #define ISL6421_EN1     0x02
  33 #define ISL6421_VSEL1   0x04
  34 #define ISL6421_LLC1    0x08
  35 #define ISL6421_ENT1    0x10
  36 #define ISL6421_ISEL1   0x20
  37 #define ISL6421_DCL     0x40
  38
  39 #if IS_REACHABLE(CONFIG_DVB_ISL6421)
  40 /* override_set and override_clear control which system register bits (above) to always set & clear */
  41 extern struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
  42                           u8 override_set, u8 override_clear, bool override_tone);
  43 #else
  44 static inline struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
  45                                                   u8 override_set, u8 override_clear, bool override_tone)
  46 {
  47         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  48         return NULL;
  49 }
  50 #endif // CONFIG_DVB_ISL6421
  51
  52 #endif