drivers/media/dvb-frontends/isl6421.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * isl6421.h - driver for lnb supply and control ic ISL6421
   4  *
   5  * Copyright (C) 2006 Andrew de Quincey
   6  * Copyright (C) 2006 Oliver Endriss
   7  *
   8  * the project's page is at https://linuxtv.org
   9  */
  10
  11 #ifndef _ISL6421_H
  12 #define _ISL6421_H
  13
  14 #include <linux/dvb/frontend.h>
  15
  16 /* system register bits */
  17 #define ISL6421_OLF1    0x01
  18 #define ISL6421_EN1     0x02
  19 #define ISL6421_VSEL1   0x04
  20 #define ISL6421_LLC1    0x08
  21 #define ISL6421_ENT1    0x10
  22 #define ISL6421_ISEL1   0x20
  23 #define ISL6421_DCL     0x40
  24
  25 #if IS_REACHABLE(CONFIG_DVB_ISL6421)
  26 /* override_set and override_clear control which system register bits (above) to always set & clear */
  27 extern struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
  28                           u8 override_set, u8 override_clear, bool override_tone);
  29 #else
  30 static inline struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
  31                                                   u8 override_set, u8 override_clear, bool override_tone)
  32 {
  33         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  34         return NULL;
  35 }
  36 #endif // CONFIG_DVB_ISL6421
  37
  38 #endif