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
10 int 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 strncpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));
23 #ifdef I2C_ADAP_CLASS_TV_DIGITAL
24 d->i2c_adap.class = I2C_ADAP_CLASS_TV_DIGITAL,
25 #else
26 d->i2c_adap.class = I2C_CLASS_TV_DIGITAL,
27 #endif
28 d->i2c_adap.algo = d->props.i2c_algo;
29 d->i2c_adap.algo_data = NULL;
30 d->i2c_adap.dev.parent = &d->udev->dev;
31
32 i2c_set_adapdata(&d->i2c_adap, d);
33
34 if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)
35 err("could not add i2c adapter");
36
37 d->state |= DVB_USB_STATE_I2C;
38
39 return ret;
40 }
41
42 int dvb_usb_i2c_exit(struct dvb_usb_device *d)
43 {
44 if (d->state & DVB_USB_STATE_I2C)
45 i2c_del_adapter(&d->i2c_adap);
46 d->state &= ~DVB_USB_STATE_I2C;
47 return 0;
48 }
49
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