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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/media/dvb/dvb-usb/dvb-usb-i2c.c
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/* dvb-usb-i2c.c is part of the DVB USB library.

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 *

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 * Copyright (C) 2004-6 Patrick Boettcher ([email protected])

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 * see dvb-usb-init.c for copyright information.

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 *

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 * This file contains functions for (de-)initializing an I2C adapter.

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 */

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#include "dvb-usb-common.h"

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int dvb_usb_i2c_init(struct dvb_usb_device *d)

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{

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	int ret = 0;

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

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		return 0;

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	if (d->props.i2c_algo == NULL) {

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		err("no i2c algorithm specified");

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		return -EINVAL;

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	}

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	strlcpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));

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	d->i2c_adap.algo      = d->props.i2c_algo;

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	d->i2c_adap.algo_data = NULL;

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	d->i2c_adap.dev.parent = &d->udev->dev;

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	i2c_set_adapdata(&d->i2c_adap, d);

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	if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)

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		err("could not add i2c adapter");

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	d->state |= DVB_USB_STATE_I2C;

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	return ret;

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}

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int dvb_usb_i2c_exit(struct dvb_usb_device *d)

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{

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	if (d->state & DVB_USB_STATE_I2C)

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		i2c_del_adapter(&d->i2c_adap);

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	d->state &= ~DVB_USB_STATE_I2C;

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	return 0;

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}

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