// SPDX-License-Identifier: GPL-2.0
/* dvb-usb-i2c.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
 * 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");
                ret = -EINVAL;
                goto err;
        }

        strscpy(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);

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

        d->state |= DVB_USB_STATE_I2C;

err:
        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;
}