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 	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 
37 int 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