dvb-usb-i2c.c

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/* dvb-usb-i2c.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 Patrick Boettcher ([email protected])
 * see dvb-usb-init.c for copyright information.
 *
 * This file contains functions for (de-)initializing an I2C adapter.
 */
#include "dvb-usb-common.h"

int dvb_usb_i2c_init(struct dvb_usb_device *d)
{
    int ret = 0;

    if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))
        return 0;

    if (d->props.i2c_algo == NULL) {
        err("no i2c algorithm specified");
        return -EINVAL;
    }

    strlcpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));
    d->i2c_adap.algo      = d->props.i2c_algo;
    d->i2c_adap.algo_data = NULL;
    d->i2c_adap.dev.parent = &d->udev->dev;

    i2c_set_adapdata(&d->i2c_adap, d);

    if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)
        err("could not add i2c adapter");

    d->state |= DVB_USB_STATE_I2C;

    return ret;
}

int dvb_usb_i2c_exit(struct dvb_usb_device *d)
{
    if (d->state & DVB_USB_STATE_I2C)
        i2c_del_adapter(&d->i2c_adap);
    d->state &= ~DVB_USB_STATE_I2C;
    return 0;
}