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.class = I2C_CLASS_TV_DIGITAL, 24 d->i2c_adap.algo = d->props.i2c_algo; 25 d->i2c_adap.algo_data = NULL; 26 d->i2c_adap.dev.parent = &d->udev->dev; 27 28 i2c_set_adapdata(&d->i2c_adap, d); 29 30 if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0) 31 err("could not add i2c adapter"); 32 33 d->state |= DVB_USB_STATE_I2C; 34 35 return ret; 36} 37 38int dvb_usb_i2c_exit(struct dvb_usb_device *d) 39{ 40 if (d->state & DVB_USB_STATE_I2C) 41 i2c_del_adapter(&d->i2c_adap); 42 d->state &= ~DVB_USB_STATE_I2C; 43 return 0; 44} 45