tmf8829_driver_linux/ams_i2c.h at main · ams-OSRAM/tmf8829_driver_linux · GitHub

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/*
 ************************************************************************************
 * Copyright (c) [2025] ams-OSRAM AG                                                *
 *                                                                                  *
 * SPDX-License-Identifier: GPL-2.0 OR MIT                                          *
 *                                                                                  *
 * For the full license texts, see LICENSES-GPL-2.0.txt or LICENSES-MIT.TXT.        *
 ************************************************************************************
*/

#ifndef __AMS_I2C_H__
#define __AMS_I2C_H__

#include <linux/i2c.h>

/**
 * i2c_read - Read number of bytes starting at a specific address over I2C
 *
 * @client: the i2c client
 * @reg: the i2c register address
 * @buf: pointer to a buffer that will contain the received data
 * @len: number of bytes to read
 *
 * Returns 0 for no Error, else negative errno.
 */
int i2c_read(struct i2c_client *client, char reg, char *buf, int len);

/**
 * i2c_write - Write number of bytes starting at a specific address over I2C
 *
 * @client: the i2c client
 * @reg: the i2c register address
 * @buf: pointer to a buffer that will contain the data to write
 * @len: number of bytes to write
 *
 * Returns 0 for no Error, else negative errno.
 */
int i2c_write(struct i2c_client *client, char reg, const char *buf, int len);

/**
 * i2c_write_mask - Write a byte to the specified address with a given bitmask
 *
 * @client: the i2c client
 * @reg: the i2c register address
 * @val: byte to write
 * @mask: bitmask to apply to address before writing
 *
 * Returns 0 for no Error, else negative errno.
 */
int i2c_write_mask(struct i2c_client *client, char reg, char val, char mask);

/**
 * i2c_get_register - Return a specific register
 *
 * @chip: sensor_chip pointer
 * @client: the i2c client
 * @reg: the i2c register address
 * @value: pointer to value in register
 *
 * Returns 0 for no Error, else negative errno.
 */
int i2c_get_register(struct i2c_client *client, char reg, char *value);

/**
 * i2c_set_register - Set a specific register
 *
 * @chip: sensor_chip pointer
 * @client: the i2c client
 * @reg: the i2c register address
 * @value: value to set in register
 * Returns 0 for no Error, else negative errno.
 */
int i2c_set_register(struct i2c_client *client, char reg, const char value);

#endif