treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / media / tuners / mt2131.h
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  Driver for Microtune MT2131 "QAM/8VSB single chip tuner"
4  *
5  *  Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
6  */
7
8 #ifndef __MT2131_H__
9 #define __MT2131_H__
10
11 struct dvb_frontend;
12 struct i2c_adapter;
13
14 struct mt2131_config {
15         u8 i2c_address;
16         u8 clock_out; /* 0 = off, 1 = CLK/4, 2 = CLK/2, 3 = CLK/1 */
17 };
18
19 #if IS_REACHABLE(CONFIG_MEDIA_TUNER_MT2131)
20 extern struct dvb_frontend* mt2131_attach(struct dvb_frontend *fe,
21                                           struct i2c_adapter *i2c,
22                                           struct mt2131_config *cfg,
23                                           u16 if1);
24 #else
25 static inline struct dvb_frontend* mt2131_attach(struct dvb_frontend *fe,
26                                                  struct i2c_adapter *i2c,
27                                                  struct mt2131_config *cfg,
28                                                  u16 if1)
29 {
30         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
31         return NULL;
32 }
33 #endif /* CONFIG_MEDIA_TUNER_MT2131 */
34
35 #endif /* __MT2131_H__ */