/**************************************************************************

 *                       I.MX6 MAC Address hacking

 * 说明：

 *     本文记录I.MX6驱动是如何获取MAC地址的。

 *

 *                                  2016-6-24 深圳 南山平山村 曾剑锋

 **************************************************************************/

/*

 * initialize __mach_desc_MX6Q_SABRESD data structure.

 */

MACHINE_START(MX6Q_SABRESD, "Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board")

    /* Maintainer: Freescale Semiconductor, Inc. */

    .boot_params = MX6_PHYS_OFFSET + 0x100,

    .fixup = fixup_mxc_board,

    .map_io = mx6_map_io,

    .init_irq = mx6_init_irq,

    .init_machine = mx6_sabresd_board_init,        --------------+

    .timer = &mx6_sabresd_timer,                                 |

    .reserve = mx6q_sabresd_reserve,                             |

MACHINE_END                                                      |

                                                                 |

                                                                 |

static void __init mx6_sabresd_board_init(void)    <-------------+

{

    ......

    imx6_init_fec(fec_data);                       --------------------+

    ......                                                             |

}                                                                      |

                                                                       |

void __init imx6_init_fec(struct fec_platform_data fec_data)      <----+

{

    fec_get_mac_addr(fec_data.mac);                      ----------+

    if (!is_valid_ether_addr(fec_data.mac))                        |

        random_ether_addr(fec_data.mac);                           |

                                                                   |

    if (cpu_is_mx6sl())                                            |

        imx6sl_add_fec(&fec_data);                                 |

    else                                                           |

        imx6q_add_fec(&fec_data);                                  |

}                                                                  |

                                                                   |

static int fec_get_mac_addr(unsigned char *mac)         <----------+

{

    unsigned int value;

    value = readl(MX6_IO_ADDRESS(OCOTP_BASE_ADDR) + HW_OCOTP_MACn());

    mac[] = value & 0xff;

    mac[] = (value >> ) & 0xff;

    mac[] = (value >> ) & 0xff;

    mac[] = (value >> ) & 0xff;

    value = readl(MX6_IO_ADDRESS(OCOTP_BASE_ADDR) + HW_OCOTP_MACn());

    mac[] = value & 0xff;

    mac[] = (value >> ) & 0xff;

    return ;

}