LXR linux/drivers/media/usb/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
  10int 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
  37int 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