xref: /openbmc/u-boot/board/xilinx/common/board.c (revision 829e8c73dd75eb49c00a6916963ec7b0b1a771c5)
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 
11 #if !defined(CONFIG_DM_I2C)
12 int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
13 {
14 #if defined(CONFIG_ZYNQ_GEM_EEPROM_ADDR) && \
15     defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET) && \
16     defined(CONFIG_ZYNQ_EEPROM_BUS)
17 	i2c_set_bus_num(CONFIG_ZYNQ_EEPROM_BUS);
18 
19 	if (eeprom_read(CONFIG_ZYNQ_GEM_EEPROM_ADDR,
20 			CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET,
21 			ethaddr, 6))
22 		printf("I2C EEPROM MAC address read failed\n");
23 #endif
24 
25 	return 0;
26 }
27 
28 #else
29 int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
30 {
31 	int ret = -EINVAL;
32 
33 #if defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET)
34 	struct udevice *dev;
35 	ofnode eeprom;
36 
37 	eeprom = ofnode_get_chosen_node("xlnx,eeprom");
38 	if (!ofnode_valid(eeprom))
39 		return -ENODEV;
40 
41 	debug("%s: Path to EEPROM %s\n", __func__,
42 	      ofnode_get_chosen_prop("xlnx,eeprom"));
43 
44 	ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev);
45 	if (ret)
46 		return ret;
47 
48 	ret = dm_i2c_read(dev, CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET, ethaddr, 6);
49 	if (ret)
50 		debug("%s: I2C EEPROM MAC address read failed\n", __func__);
51 	else
52 		debug("%s: I2C EEPROM MAC %pM\n", __func__, ethaddr);
53 #endif
54 
55 	return ret;
56 }
57 #endif
58