treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / media / usb / dvb-usb-v2 / mxl111sf-demod.h
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  mxl111sf-demod.h - driver for the MaxLinear MXL111SF DVB-T demodulator
4  *
5  *  Copyright (C) 2010-2014 Michael Krufky <mkrufky@linuxtv.org>
6  */
7
8 #ifndef __MXL111SF_DEMOD_H__
9 #define __MXL111SF_DEMOD_H__
10
11 #include <media/dvb_frontend.h>
12 #include "mxl111sf.h"
13
14 struct mxl111sf_demod_config {
15         int (*read_reg)(struct mxl111sf_state *state, u8 addr, u8 *data);
16         int (*write_reg)(struct mxl111sf_state *state, u8 addr, u8 data);
17         int (*program_regs)(struct mxl111sf_state *state,
18                             struct mxl111sf_reg_ctrl_info *ctrl_reg_info);
19 };
20
21 #if IS_ENABLED(CONFIG_DVB_USB_MXL111SF)
22 extern
23 struct dvb_frontend *mxl111sf_demod_attach(struct mxl111sf_state *mxl_state,
24                                    const struct mxl111sf_demod_config *cfg);
25 #else
26 static inline
27 struct dvb_frontend *mxl111sf_demod_attach(struct mxl111sf_state *mxl_state,
28                                    const struct mxl111sf_demod_config *cfg)
29 {
30         printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
31         return NULL;
32 }
33 #endif /* CONFIG_DVB_USB_MXL111SF */
34
35 #endif /* __MXL111SF_DEMOD_H__ */