app/tests/i2c_test.c

/*
 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *     * Neither the name of The Linux Foundation, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <i2c_qup.h>
#include <blsp_qup.h>

#define EEPROM_HW_I2C_ADDRESS       (0x52)

void eeprom_read_test()
{

	struct qup_i2c_dev  *dev;
	char ret[100] = {'\0'};

	dev = qup_blsp_i2c_init(BLSP_ID_2, QUP_ID_4, 100000, 19200000);

	if (!dev) {
		dprintf(CRITICAL, "Failed initializing I2c\n");
		return;
	}

	/* Create a i2c_msg buffer, to read from eprom */

	struct i2c_msg msg_buf[] = {
		{EEPROM_HW_I2C_ADDRESS, I2C_M_RD, 100, ret}
	};

	qup_i2c_xfer(dev, msg_buf, 1);
}