i2cd.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2021 Steven Stallion <sstallion@gmail.com>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 * the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef I2CD_H
#define I2CD_H
 
#include <stddef.h>
#include <stdint.h>
#include <linux/i2c.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct i2cd;
 
struct i2cd *i2cd_open(const char *path);
 
struct i2cd *i2cd_open_by_name(const char *name);
 
struct i2cd *i2cd_open_by_number(unsigned int num);
 
void i2cd_close(struct i2cd *dev);
 
const char *i2cd_get_path(struct i2cd *dev);
 
int i2cd_set_retries(struct i2cd *dev, unsigned long retries);
 
int i2cd_set_timeout(struct i2cd *dev, unsigned long timeout);
 
int i2cd_get_functionality(struct i2cd *dev, unsigned long *funcs);
 
int i2cd_transfer(struct i2cd *dev, struct i2c_msg msgs[], size_t nmsgs);
 
int i2cd_read(struct i2cd *dev, uint16_t addr, void *buf, size_t len);
 
int i2cd_write(struct i2cd *dev, uint16_t addr, const void *buf, size_t len);
 
int i2cd_write_read(struct i2cd *dev, uint16_t addr,
        const void *write_buf, size_t write_len,
        void *read_buf, size_t read_len);
 
static inline int i2cd_register_read(struct i2cd *dev, uint16_t addr,
        uint8_t reg, void *buf, size_t len)
{
    return i2cd_write_read(dev, addr, &reg, sizeof(reg), buf, len);
}
 
static inline int i2cd_register_read16(struct i2cd *dev, uint16_t addr,
        uint16_t reg, void *buf, size_t len)
{
    return i2cd_write_read(dev, addr, &reg, sizeof(reg), buf, len);
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* I2CD_H */