1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * isl6421.h - driver for lnb supply and control ic ISL6421
 4 *
 5 * Copyright (C) 2006 Andrew de Quincey
 6 * Copyright (C) 2006 Oliver Endriss
 7 *
 8 * the project's page is at https://linuxtv.org
 9 */
10
11#ifndef _ISL6421_H
12#define _ISL6421_H
13
14#include <linux/dvb/frontend.h>
15
16/* system register bits */
17#define ISL6421_OLF1	0x01
18#define ISL6421_EN1	0x02
19#define ISL6421_VSEL1	0x04
20#define ISL6421_LLC1	0x08
21#define ISL6421_ENT1	0x10
22#define ISL6421_ISEL1	0x20
23#define ISL6421_DCL	0x40
24
25#if IS_REACHABLE(CONFIG_DVB_ISL6421)
26/* override_set and override_clear control which system register bits (above) to always set & clear */
27extern struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
28			  u8 override_set, u8 override_clear, bool override_tone);
29#else
30static inline struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
31						  u8 override_set, u8 override_clear, bool override_tone)
32{
33	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
34	return NULL;
35}
36#endif // CONFIG_DVB_ISL6421
37
38#endif