drivers/media/dvb-frontends/zd1301_demod.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * ZyDAS ZD1301 driver (demodulator)
   4  *
   5  * Copyright (C) 2015 Antti Palosaari <crope@iki.fi>
   6  */
   7
   8 #ifndef ZD1301_DEMOD_H
   9 #define ZD1301_DEMOD_H
  10
  11 #include <linux/platform_device.h>
  12 #include <linux/dvb/frontend.h>
  13 #include <media/dvb_frontend.h>
  14
  15 /**
  16  * struct zd1301_demod_platform_data - Platform data for the zd1301_demod driver
  17  * @reg_priv: First argument of reg_read and reg_write callbacks.
  18  * @reg_read: Register read callback.
  19  * @reg_write: Register write callback.
  20  */
  21 struct zd1301_demod_platform_data {
  22         void *reg_priv;
  23         int (*reg_read)(void *, u16, u8 *);
  24         int (*reg_write)(void *, u16, u8);
  25 };
  26
  27 #if IS_REACHABLE(CONFIG_DVB_ZD1301_DEMOD)
  28 /**
  29  * zd1301_demod_get_dvb_frontend() - Get pointer to DVB frontend
  30  * @pdev: Pointer to platform device
  31  *
  32  * Return: Pointer to DVB frontend which given platform device owns.
  33  */
  34 struct dvb_frontend *zd1301_demod_get_dvb_frontend(struct platform_device *pdev);
  35
  36 /**
  37  * zd1301_demod_get_i2c_adapter() - Get pointer to I2C adapter
  38  * @pdev: Pointer to platform device
  39  *
  40  * Return: Pointer to I2C adapter which given platform device owns.
  41  */
  42 struct i2c_adapter *zd1301_demod_get_i2c_adapter(struct platform_device *pdev);
  43
  44 #else
  45
  46 /**
  47  * zd1301_demod_get_dvb_frontend() - Attach a zd1301 frontend
  48  * @dev: Pointer to platform device
  49  *
  50  * Return: Pointer to %struct dvb_frontend or NULL if attach fails.
  51  */
  52 static inline struct dvb_frontend *zd1301_demod_get_dvb_frontend(struct platform_device *dev)
  53 {
  54         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  55
  56         return NULL;
  57 }
  58 static inline struct i2c_adapter *zd1301_demod_get_i2c_adapter(struct platform_device *dev)
  59 {
  60         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
  61
  62         return NULL;
  63 }
  64
  65 #endif
  66
  67 #endif /* ZD1301_DEMOD_H */