cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

dvb-usb-i2c.c (1093B)

      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		ret = -EINVAL;
     21		goto err;
     22	}
     23
     24	strscpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));
     25	d->i2c_adap.algo      = d->props.i2c_algo;
     26	d->i2c_adap.algo_data = NULL;
     27	d->i2c_adap.dev.parent = &d->udev->dev;
     28
     29	i2c_set_adapdata(&d->i2c_adap, d);
     30
     31	ret = i2c_add_adapter(&d->i2c_adap);
     32	if (ret < 0) {
     33		err("could not add i2c adapter");
     34		goto err;
     35	}
     36
     37	d->state |= DVB_USB_STATE_I2C;
     38
     39err:
     40	return ret;
     41}
     42
     43int dvb_usb_i2c_exit(struct dvb_usb_device *d)
     44{
     45	if (d->state & DVB_USB_STATE_I2C)
     46		i2c_del_adapter(&d->i2c_adap);
     47	d->state &= ~DVB_USB_STATE_I2C;
     48	return 0;
     49}