add support for DDR3 in am335x evm

Hi,

DDR3 support should already be implemented in the kernel and u-boot included in the latest SDK (version 06.00.00.00).

You don't need to manually apply additional patches.

Please check the void s_init(void) function inside <u-boot_dir>/board/ti/am335x/board.c file:

    if (!strncmp("A335X_SK", header.name, HDR_NAME_LEN))
        config_ddr(303, MT41J128MJT125_IOCTRL_VALUE, &ddr3_data,
               &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data);
    else if  (!strncmp("A335BNLT", header.name, 8))
        config_ddr(400, MT41K256M16HA125E_IOCTRL_VALUE,
               &ddr3_beagleblack_data,
               &ddr3_beagleblack_cmd_ctrl_data,
               &ddr3_beagleblack_emif_reg_data);
    else if (!strncmp("A33515BB", header.name, 8) &&
                strncmp("1.5", header.version, 3) <= 0)
        config_ddr(303, MT41J512M8RH125_IOCTRL_VALUE, &ddr3_evm_data,
               &ddr3_evm_cmd_ctrl_data, &ddr3_evm_emif_reg_data);
    else
        config_ddr(266, MT47H128M16RT25E_IOCTRL_VALUE, &ddr2_data,
               &ddr2_cmd_ctrl_data, &ddr2_emif_reg_data);

Basically it configures the DDR based on the reading from the EEPROM. You just need to workaround this EEPROM check or remove it (it isn't necessary if you only support one board).

Best regards,
Miroslav