drivers/media/dvb-frontends/zd1301_demod.h

   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  */
  30 struct 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  */
  43 struct 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  */
  51 struct 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  */
  61 static 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 }
  67 static 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 */