u-boot/board/xilinx/common/board.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2014 - 2019 Xilinx, Inc.
 * Michal Simek <michal.simek@xilinx.com>
 */

#include <common.h>
#include <dm/uclass.h>
#include <i2c.h>

#if !defined(CONFIG_DM_I2C)
int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
{
#if defined(CONFIG_ZYNQ_GEM_EEPROM_ADDR) && \
    defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET) && \
    defined(CONFIG_ZYNQ_EEPROM_BUS)
	i2c_set_bus_num(CONFIG_ZYNQ_EEPROM_BUS);

	if (eeprom_read(CONFIG_ZYNQ_GEM_EEPROM_ADDR,
			CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET,
			ethaddr, 6))
		printf("I2C EEPROM MAC address read failed\n");
#endif

	return 0;
}

#else
int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
{
	int ret = -EINVAL;

#if defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET)
	struct udevice *dev;
	ofnode eeprom;

	eeprom = ofnode_get_chosen_node("xlnx,eeprom");
	if (!ofnode_valid(eeprom))
		return -ENODEV;

	debug("%s: Path to EEPROM %s\n", __func__,
	      ofnode_get_chosen_prop("xlnx,eeprom"));

	ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev);
	if (ret)
		return ret;

	ret = dm_i2c_read(dev, CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET, ethaddr, 6);
	if (ret)
		debug("%s: I2C EEPROM MAC address read failed\n", __func__);
	else
		debug("%s: I2C EEPROM MAC %pM\n", __func__, ethaddr);
#endif

	return ret;
}
#endif