LXR linux/drivers/media/dvb-frontends/lnbp22.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * lnbp22.h - driver for lnb supply and control ic lnbp22
   4 *
   5 * Copyright (C) 2006 Dominik Kuhlen
   6 * Based on lnbp21.h
   7 *
   8 * the project's page is at https://linuxtv.org
   9 */
  10
  11#ifndef _LNBP22_H
  12#define _LNBP22_H
  13
  14/* Enable */
  15#define LNBP22_EN         0x10
  16/* Voltage selection */
  17#define LNBP22_VSEL     0x02
  18/* Plus 1 Volt Bit */
  19#define LNBP22_LLC      0x01
  20
  21#include <linux/dvb/frontend.h>
  22
  23#if IS_REACHABLE(CONFIG_DVB_LNBP22)
  24/*
  25 * override_set and override_clear control which system register bits (above)
  26 * to always set & clear
  27 */
  28extern struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe,
  29                                                struct i2c_adapter *i2c);
  30#else
  31static inline struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe,
  32                                                struct i2c_adapter *i2c)
  33{
  34        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  35        return NULL;
  36}
  37#endif /* CONFIG_DVB_LNBP22 */
  38
  39#endif /* _LNBP22_H */
  40