dvb-usb-i2c.c revision 786baecfe78f8e25547c628b48a60fc8e5636056 
1/* dvb-usb-i2c.c is part of the DVB USB library.
2 *
3 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
4 * see dvb-usb-init.c for copyright information.
5 *
6 * This file contains functions for (de-)initializing an I2C adapter.
7 */
8#include "dvb-usb-common.h"
9
10int dvb_usb_i2c_init(struct dvb_usb_device *d)
11{
12	int ret = 0;
13
14	if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))
15		return 0;
16
17	if (d->props.i2c_algo == NULL) {
18		err("no i2c algorithm specified");
19		return -EINVAL;
20	}
21
22	strlcpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));
23	d->i2c_adap.algo      = d->props.i2c_algo;
24	d->i2c_adap.algo_data = NULL;
25	d->i2c_adap.dev.parent = &d->udev->dev;
26
27	i2c_set_adapdata(&d->i2c_adap, d);
28
29	if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)
30		err("could not add i2c adapter");
31
32	d->state |= DVB_USB_STATE_I2C;
33
34	return ret;
35}
36
37int dvb_usb_i2c_exit(struct dvb_usb_device *d)
38{
39	if (d->state & DVB_USB_STATE_I2C)
40		i2c_del_adapter(&d->i2c_adap);
41	d->state &= ~DVB_USB_STATE_I2C;
42	return 0;
43}
44