1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2786baecfSMauro Carvalho Chehab /* dvb-usb-i2c.c is part of the DVB USB library. 3786baecfSMauro Carvalho Chehab * 499e44da7SPatrick Boettcher * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de) 5786baecfSMauro Carvalho Chehab * see dvb-usb-init.c for copyright information. 6786baecfSMauro Carvalho Chehab * 7786baecfSMauro Carvalho Chehab * This file contains functions for (de-)initializing an I2C adapter. 8786baecfSMauro Carvalho Chehab */ 9786baecfSMauro Carvalho Chehab #include "dvb-usb-common.h" 10786baecfSMauro Carvalho Chehab 11786baecfSMauro Carvalho Chehab int dvb_usb_i2c_init(struct dvb_usb_device *d) 12786baecfSMauro Carvalho Chehab { 13786baecfSMauro Carvalho Chehab int ret = 0; 14786baecfSMauro Carvalho Chehab 15786baecfSMauro Carvalho Chehab if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER)) 16786baecfSMauro Carvalho Chehab return 0; 17786baecfSMauro Carvalho Chehab 18786baecfSMauro Carvalho Chehab if (d->props.i2c_algo == NULL) { 19786baecfSMauro Carvalho Chehab err("no i2c algorithm specified"); 20786baecfSMauro Carvalho Chehab return -EINVAL; 21786baecfSMauro Carvalho Chehab } 22786baecfSMauro Carvalho Chehab 23*c0decac1SMauro Carvalho Chehab strscpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name)); 24786baecfSMauro Carvalho Chehab d->i2c_adap.algo = d->props.i2c_algo; 25786baecfSMauro Carvalho Chehab d->i2c_adap.algo_data = NULL; 26786baecfSMauro Carvalho Chehab d->i2c_adap.dev.parent = &d->udev->dev; 27786baecfSMauro Carvalho Chehab 28786baecfSMauro Carvalho Chehab i2c_set_adapdata(&d->i2c_adap, d); 29786baecfSMauro Carvalho Chehab 30786baecfSMauro Carvalho Chehab if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0) 31786baecfSMauro Carvalho Chehab err("could not add i2c adapter"); 32786baecfSMauro Carvalho Chehab 33786baecfSMauro Carvalho Chehab d->state |= DVB_USB_STATE_I2C; 34786baecfSMauro Carvalho Chehab 35786baecfSMauro Carvalho Chehab return ret; 36786baecfSMauro Carvalho Chehab } 37786baecfSMauro Carvalho Chehab 38786baecfSMauro Carvalho Chehab int dvb_usb_i2c_exit(struct dvb_usb_device *d) 39786baecfSMauro Carvalho Chehab { 40786baecfSMauro Carvalho Chehab if (d->state & DVB_USB_STATE_I2C) 41786baecfSMauro Carvalho Chehab i2c_del_adapter(&d->i2c_adap); 42786baecfSMauro Carvalho Chehab d->state &= ~DVB_USB_STATE_I2C; 43786baecfSMauro Carvalho Chehab return 0; 44786baecfSMauro Carvalho Chehab } 45