LXR linux/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 */
  27extern 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
  30static 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
  39