tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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 return -EINVAL;
21 }
22
23 strlcpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));
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
38int 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}