board/atmel/common/mac_eeprom.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 Microchip
   4  *                    Wenyou Yang <wenyou.yang@microchip.com>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <environment.h>
  10 #include <i2c_eeprom.h>
  11 #include <netdev.h>
  12
  13 int at91_set_ethaddr(int offset)
  14 {
  15         const int ETH_ADDR_LEN = 6;
  16         unsigned char ethaddr[ETH_ADDR_LEN];
  17         const char *ETHADDR_NAME = "ethaddr";
  18         struct udevice *dev;
  19         int ret;
  20
  21         if (env_get(ETHADDR_NAME))
  22                 return 0;
  23
  24         ret = uclass_first_device_err(UCLASS_I2C_EEPROM, &dev);
  25         if (ret)
  26                 return ret;
  27
  28         ret = i2c_eeprom_read(dev, offset, ethaddr, 6);
  29         if (ret)
  30                 return ret;
  31
  32         if (is_valid_ethaddr(ethaddr))
  33                 eth_env_set_enetaddr(ETHADDR_NAME, ethaddr);
  34
  35         return 0;
  36 }