1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* dvb-usb-i2c.c is part of the DVB USB library. 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de) 5*4882a593Smuzhiyun * see dvb-usb-init.c for copyright information. 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * This file contains functions for (de-)initializing an I2C adapter. 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun #include "dvb-usb-common.h" 10*4882a593Smuzhiyun dvb_usb_i2c_init(struct dvb_usb_device * d)11*4882a593Smuzhiyunint dvb_usb_i2c_init(struct dvb_usb_device *d) 12*4882a593Smuzhiyun { 13*4882a593Smuzhiyun int ret = 0; 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER)) 16*4882a593Smuzhiyun return 0; 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun if (d->props.i2c_algo == NULL) { 19*4882a593Smuzhiyun err("no i2c algorithm specified"); 20*4882a593Smuzhiyun ret = -EINVAL; 21*4882a593Smuzhiyun goto err; 22*4882a593Smuzhiyun } 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun strscpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name)); 25*4882a593Smuzhiyun d->i2c_adap.algo = d->props.i2c_algo; 26*4882a593Smuzhiyun d->i2c_adap.algo_data = NULL; 27*4882a593Smuzhiyun d->i2c_adap.dev.parent = &d->udev->dev; 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun i2c_set_adapdata(&d->i2c_adap, d); 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun ret = i2c_add_adapter(&d->i2c_adap); 32*4882a593Smuzhiyun if (ret < 0) { 33*4882a593Smuzhiyun err("could not add i2c adapter"); 34*4882a593Smuzhiyun goto err; 35*4882a593Smuzhiyun } 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun d->state |= DVB_USB_STATE_I2C; 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun err: 40*4882a593Smuzhiyun return ret; 41*4882a593Smuzhiyun } 42*4882a593Smuzhiyun dvb_usb_i2c_exit(struct dvb_usb_device * d)43*4882a593Smuzhiyunint dvb_usb_i2c_exit(struct dvb_usb_device *d) 44*4882a593Smuzhiyun { 45*4882a593Smuzhiyun if (d->state & DVB_USB_STATE_I2C) 46*4882a593Smuzhiyun i2c_del_adapter(&d->i2c_adap); 47*4882a593Smuzhiyun d->state &= ~DVB_USB_STATE_I2C; 48*4882a593Smuzhiyun return 0; 49*4882a593Smuzhiyun } 50