Merge branch 'tracing/urgent' into tracing/ftrace
[linux-2.6] / drivers / media / dvb / dvb-usb / dvb-usb-i2c.c
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         d->i2c_adap.class = I2C_CLASS_TV_DIGITAL,
24         d->i2c_adap.algo      = d->props.i2c_algo;
25         d->i2c_adap.algo_data = NULL;
26         d->i2c_adap.dev.parent = &d->udev->dev;
27
28         i2c_set_adapdata(&d->i2c_adap, d);
29
30         if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)
31                 err("could not add i2c adapter");
32
33         d->state |= DVB_USB_STATE_I2C;
34
35         return ret;
36 }
37
38 int dvb_usb_i2c_exit(struct dvb_usb_device *d)
39 {
40         if (d->state & DVB_USB_STATE_I2C)
41                 i2c_del_adapter(&d->i2c_adap);
42         d->state &= ~DVB_USB_STATE_I2C;
43         return 0;
44 }