1 /*
2  * isl6421.h - driver for lnb supply and control ic ISL6421
3  *
4  * Copyright (C) 2006 Andrew de Quincey
5  * Copyright (C) 2006 Oliver Endriss
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * To obtain the license, point your browser to
19  * http://www.gnu.org/copyleft/gpl.html
20  *
21  *
22  * the project's page is at https://linuxtv.org
23  */
24 
25 #ifndef _ISL6421_H
26 #define _ISL6421_H
27 
28 #include <linux/dvb/frontend.h>
29 
30 /* system register bits */
31 #define ISL6421_OLF1	0x01
32 #define ISL6421_EN1	0x02
33 #define ISL6421_VSEL1	0x04
34 #define ISL6421_LLC1	0x08
35 #define ISL6421_ENT1	0x10
36 #define ISL6421_ISEL1	0x20
37 #define ISL6421_DCL	0x40
38 
39 #if IS_REACHABLE(CONFIG_DVB_ISL6421)
40 /* override_set and override_clear control which system register bits (above) to always set & clear */
41 extern struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
42 			  u8 override_set, u8 override_clear, bool override_tone);
43 #else
44 static inline struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
45 						  u8 override_set, u8 override_clear, bool override_tone)
46 {
47 	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
48 	return NULL;
49 }
50 #endif // CONFIG_DVB_ISL6421
51 
52 #endif
53