1 // SPDX-License-Identifier: GPL-2.0 2 /* dvb-usb-i2c.c is part of the DVB USB library. 3 * 4 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de) 5 * see dvb-usb-init.c for copyright information. 6 * 7 * This file contains functions for (de-)initializing an I2C adapter. 8 */ 9 #include "dvb-usb-common.h" 10 dvb_usb_i2c_init(struct dvb_usb_device * d)11int dvb_usb_i2c_init(struct dvb_usb_device *d) 12 { 13 int ret = 0; 14 15 if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER)) 16 return 0; 17 18 if (d->props.i2c_algo == NULL) { 19 err("no i2c algorithm specified"); 20 ret = -EINVAL; 21 goto err; 22 } 23 24 strscpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name)); 25 d->i2c_adap.algo = d->props.i2c_algo; 26 d->i2c_adap.algo_data = NULL; 27 d->i2c_adap.dev.parent = &d->udev->dev; 28 29 i2c_set_adapdata(&d->i2c_adap, d); 30 31 ret = i2c_add_adapter(&d->i2c_adap); 32 if (ret < 0) { 33 err("could not add i2c adapter"); 34 goto err; 35 } 36 37 d->state |= DVB_USB_STATE_I2C; 38 39 err: 40 return ret; 41 } 42 dvb_usb_i2c_exit(struct dvb_usb_device * d)43int dvb_usb_i2c_exit(struct dvb_usb_device *d) 44 { 45 if (d->state & DVB_USB_STATE_I2C) 46 i2c_del_adapter(&d->i2c_adap); 47 d->state &= ~DVB_USB_STATE_I2C; 48 return 0; 49 } 50