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
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
39err:
40	return ret;
41}
42
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