| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* 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 | |
| 11 | int 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(adap: &d->i2c_adap, data: d); |
| 30 | |
| 31 | ret = i2c_add_adapter(adap: &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 | |
| 39 | err: |
| 40 | return ret; |
| 41 | } |
| 42 | |
| 43 | int dvb_usb_i2c_exit(struct dvb_usb_device *d) |
| 44 | { |
| 45 | if (d->state & DVB_USB_STATE_I2C) |
| 46 | i2c_del_adapter(adap: &d->i2c_adap); |
| 47 | d->state &= ~DVB_USB_STATE_I2C; |
| 48 | return 0; |
| 49 | } |
| 50 |