linux/drivers/i2c/i2c-core-slave.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Linux I2C core slave support code
 *
 * Copyright (C) 2014 by Wolfram Sang <[email protected]>
 */

#include <dt-bindings/i2c/i2c.h>
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/of.h>

#include "i2c-core.h"

#define CREATE_TRACE_POINTS
#include <trace/events/i2c_slave.h>

int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb)
{ … }
EXPORT_SYMBOL_GPL(…);

int i2c_slave_unregister(struct i2c_client *client)
{ … }
EXPORT_SYMBOL_GPL(…);

int i2c_slave_event(struct i2c_client *client,
		    enum i2c_slave_event event, u8 *val)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * i2c_detect_slave_mode - detect operation mode
 * @dev: The device owning the bus
 *
 * This checks the device nodes for an I2C slave by checking the address
 * used in the reg property. If the address match the I2C_OWN_SLAVE_ADDRESS
 * flag this means the device is configured to act as a I2C slave and it will
 * be listening at that address.
 *
 * Returns true if an I2C own slave address is detected, otherwise returns
 * false.
 */
bool i2c_detect_slave_mode(struct device *dev)
{ … }
EXPORT_SYMBOL_GPL(…);