50 lines · c
1// SPDX-License-Identifier: GPL-2.02/* dvb-usb-i2c.c is part of the DVB USB library.3 *4 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)5 * see dvb-usb-init.c for copyright information.6 *7 * This file contains functions for (de-)initializing an I2C adapter.8 */9#include "dvb-usb-common.h"10 11int dvb_usb_i2c_init(struct dvb_usb_device *d)12{13 int ret = 0;14 15 if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))16 return 0;17 18 if (d->props.i2c_algo == NULL) {19 err("no i2c algorithm specified");20 ret = -EINVAL;21 goto err;22 }23 24 strscpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));25 d->i2c_adap.algo = d->props.i2c_algo;26 d->i2c_adap.algo_data = NULL;27 d->i2c_adap.dev.parent = &d->udev->dev;28 29 i2c_set_adapdata(&d->i2c_adap, d);30 31 ret = i2c_add_adapter(&d->i2c_adap);32 if (ret < 0) {33 err("could not add i2c adapter");34 goto err;35 }36 37 d->state |= DVB_USB_STATE_I2C;38 39err:40 return ret;41}42 43int dvb_usb_i2c_exit(struct dvb_usb_device *d)44{45 if (d->state & DVB_USB_STATE_I2C)46 i2c_del_adapter(&d->i2c_adap);47 d->state &= ~DVB_USB_STATE_I2C;48 return 0;49}50