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 dvb_usb_i2c_init(struct dvb_usb_device * d)11786baecfSMauro Carvalho Chehabint 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"); 20*131ae388SDongliang Mu ret = -EINVAL; 21*131ae388SDongliang Mu goto err; 22786baecfSMauro Carvalho Chehab } 23786baecfSMauro Carvalho Chehab 24c0decac1SMauro Carvalho Chehab strscpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name)); 25786baecfSMauro Carvalho Chehab d->i2c_adap.algo = d->props.i2c_algo; 26786baecfSMauro Carvalho Chehab d->i2c_adap.algo_data = NULL; 27786baecfSMauro Carvalho Chehab d->i2c_adap.dev.parent = &d->udev->dev; 28786baecfSMauro Carvalho Chehab 29786baecfSMauro Carvalho Chehab i2c_set_adapdata(&d->i2c_adap, d); 30786baecfSMauro Carvalho Chehab 31*131ae388SDongliang Mu ret = i2c_add_adapter(&d->i2c_adap); 32*131ae388SDongliang Mu if (ret < 0) { 33786baecfSMauro Carvalho Chehab err("could not add i2c adapter"); 34*131ae388SDongliang Mu goto err; 35*131ae388SDongliang Mu } 36786baecfSMauro Carvalho Chehab 37786baecfSMauro Carvalho Chehab d->state |= DVB_USB_STATE_I2C; 38786baecfSMauro Carvalho Chehab 39*131ae388SDongliang Mu err: 40786baecfSMauro Carvalho Chehab return ret; 41786baecfSMauro Carvalho Chehab } 42786baecfSMauro Carvalho Chehab dvb_usb_i2c_exit(struct dvb_usb_device * d)43786baecfSMauro Carvalho Chehabint dvb_usb_i2c_exit(struct dvb_usb_device *d) 44786baecfSMauro Carvalho Chehab { 45786baecfSMauro Carvalho Chehab if (d->state & DVB_USB_STATE_I2C) 46786baecfSMauro Carvalho Chehab i2c_del_adapter(&d->i2c_adap); 47786baecfSMauro Carvalho Chehab d->state &= ~DVB_USB_STATE_I2C; 48786baecfSMauro Carvalho Chehab return 0; 49786baecfSMauro Carvalho Chehab } 50