| // SPDX-License-Identifier: GPL-2.0 |
| /* dvb-usb-i2c.c is part of the DVB USB library. |
| * |
| * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de) |
| * see dvb-usb-init.c for copyright information. |
| * |
| * This file contains functions for (de-)initializing an I2C adapter. |
| */ |
| #include "dvb-usb-common.h" |
| |
| int dvb_usb_i2c_init(struct dvb_usb_device *d) |
| { |
| int ret = 0; |
| |
| if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER)) |
| return 0; |
| |
| if (d->props.i2c_algo == NULL) { |
| err("no i2c algorithm specified"); |
| return -EINVAL; |
| } |
| |
| strlcpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name)); |
| d->i2c_adap.algo = d->props.i2c_algo; |
| d->i2c_adap.algo_data = NULL; |
| d->i2c_adap.dev.parent = &d->udev->dev; |
| |
| i2c_set_adapdata(&d->i2c_adap, d); |
| |
| if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0) |
| err("could not add i2c adapter"); |
| |
| d->state |= DVB_USB_STATE_I2C; |
| |
| return ret; |
| } |
| |
| int dvb_usb_i2c_exit(struct dvb_usb_device *d) |
| { |
| if (d->state & DVB_USB_STATE_I2C) |
| i2c_del_adapter(&d->i2c_adap); |
| d->state &= ~DVB_USB_STATE_I2C; |
| return 0; |
| } |
