LXR linux/drivers/media/dvb-frontends/zd1301

   1/*
   2 * ZyDAS ZD1301 driver (demodulator)
   3 *
   4 * Copyright (C) 2015 Antti Palosaari <crope@iki.fi>
   5 *
   6 *    This program is free software; you can redistribute it and/or modify
   7 *    it under the terms of the GNU General Public License as published by
   8 *    the Free Software Foundation; either version 2 of the License, or
   9 *    (at your option) any later version.
  10 *
  11 *    This program is distributed in the hope that it will be useful,
  12 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *    GNU General Public License for more details.
  15 */
  16
  17#ifndef ZD1301_DEMOD_H
  18#define ZD1301_DEMOD_H
  19
  20#include <linux/platform_device.h>
  21#include <linux/dvb/frontend.h>
  22#include <media/dvb_frontend.h>
  23
  24/**
  25 * struct zd1301_demod_platform_data - Platform data for the zd1301_demod driver
  26 * @reg_priv: First argument of reg_read and reg_write callbacks.
  27 * @reg_read: Register read callback.
  28 * @reg_write: Register write callback.
  29 */
  30struct zd1301_demod_platform_data {
  31        void *reg_priv;
  32        int (*reg_read)(void *, u16, u8 *);
  33        int (*reg_write)(void *, u16, u8);
  34};
  35
  36#if IS_REACHABLE(CONFIG_DVB_ZD1301_DEMOD)
  37/**
  38 * zd1301_demod_get_dvb_frontend() - Get pointer to DVB frontend
  39 * @pdev: Pointer to platform device
  40 *
  41 * Return: Pointer to DVB frontend which given platform device owns.
  42 */
  43struct dvb_frontend *zd1301_demod_get_dvb_frontend(struct platform_device *pdev);
  44
  45/**
  46 * zd1301_demod_get_i2c_adapter() - Get pointer to I2C adapter
  47 * @pdev: Pointer to platform device
  48 *
  49 * Return: Pointer to I2C adapter which given platform device owns.
  50 */
  51struct i2c_adapter *zd1301_demod_get_i2c_adapter(struct platform_device *pdev);
  52
  53#else
  54
  55/**
  56 * zd1301_demod_get_dvb_frontend() - Attach a zd1301 frontend
  57 * @dev: Pointer to platform device
  58 *
  59 * Return: Pointer to %struct dvb_frontend or NULL if attach fails.
  60 */
  61static inline struct dvb_frontend *zd1301_demod_get_dvb_frontend(struct platform_device *dev)
  62{
  63        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  64
  65        return NULL;
  66}
  67static inline struct i2c_adapter *zd1301_demod_get_i2c_adapter(struct platform_device *dev)
  68{
  69        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  70
  71        return NULL;
  72}
  73
  74#endif
  75
  76#endif /* ZD1301_DEMOD_H */
  77