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 */ 27 extern 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 30 static 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 39