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 */
77