162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci/* dvb-usb-i2c.c is part of the DVB USB library. 362306a36Sopenharmony_ci * 462306a36Sopenharmony_ci * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de) 562306a36Sopenharmony_ci * see dvb-usb-init.c for copyright information. 662306a36Sopenharmony_ci * 762306a36Sopenharmony_ci * This file contains functions for (de-)initializing an I2C adapter. 862306a36Sopenharmony_ci */ 962306a36Sopenharmony_ci#include "dvb-usb-common.h" 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ciint dvb_usb_i2c_init(struct dvb_usb_device *d) 1262306a36Sopenharmony_ci{ 1362306a36Sopenharmony_ci int ret = 0; 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER)) 1662306a36Sopenharmony_ci return 0; 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ci if (d->props.i2c_algo == NULL) { 1962306a36Sopenharmony_ci err("no i2c algorithm specified"); 2062306a36Sopenharmony_ci ret = -EINVAL; 2162306a36Sopenharmony_ci goto err; 2262306a36Sopenharmony_ci } 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ci strscpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name)); 2562306a36Sopenharmony_ci d->i2c_adap.algo = d->props.i2c_algo; 2662306a36Sopenharmony_ci d->i2c_adap.algo_data = NULL; 2762306a36Sopenharmony_ci d->i2c_adap.dev.parent = &d->udev->dev; 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci i2c_set_adapdata(&d->i2c_adap, d); 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci ret = i2c_add_adapter(&d->i2c_adap); 3262306a36Sopenharmony_ci if (ret < 0) { 3362306a36Sopenharmony_ci err("could not add i2c adapter"); 3462306a36Sopenharmony_ci goto err; 3562306a36Sopenharmony_ci } 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci d->state |= DVB_USB_STATE_I2C; 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_cierr: 4062306a36Sopenharmony_ci return ret; 4162306a36Sopenharmony_ci} 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ciint dvb_usb_i2c_exit(struct dvb_usb_device *d) 4462306a36Sopenharmony_ci{ 4562306a36Sopenharmony_ci if (d->state & DVB_USB_STATE_I2C) 4662306a36Sopenharmony_ci i2c_del_adapter(&d->i2c_adap); 4762306a36Sopenharmony_ci d->state &= ~DVB_USB_STATE_I2C; 4862306a36Sopenharmony_ci return 0; 4962306a36Sopenharmony_ci} 50