1 /* dvb-usb-i2c.c is part of the DVB USB library. 2 * 3 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.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 10 int 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 37 int 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