board/xilinx/common/board.c

   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