1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2014 - 2019 Xilinx, Inc.
4 * Michal Simek <michal.simek@xilinx.com>
5 */
6
7 #include <common.h>
8 #include <dm/uclass.h>
9 #include <i2c.h>
10
zynq_board_read_rom_ethaddr(unsigned char * ethaddr)11 int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
12 {
13 int ret = -EINVAL;
14
15 #if defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET)
16 struct udevice *dev;
17 ofnode eeprom;
18
19 eeprom = ofnode_get_chosen_node("xlnx,eeprom");
20 if (!ofnode_valid(eeprom))
21 return -ENODEV;
22
23 debug("%s: Path to EEPROM %s\n", __func__,
24 ofnode_get_chosen_prop("xlnx,eeprom"));
25
26 ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev);
27 if (ret)
28 return ret;
29
30 ret = dm_i2c_read(dev, CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET, ethaddr, 6);
31 if (ret)
32 debug("%s: I2C EEPROM MAC address read failed\n", __func__);
33 else
34 debug("%s: I2C EEPROM MAC %pM\n", __func__, ethaddr);
35 #endif
36
37 return ret;
38 }
39