Prebuilt uboot.bin file for AM335x Starter Kit

That u-boot should work on EVM, Starter Kit, Beaglebone, and Beaglebone Black.

Steve K.

Different reference h/w has different DDR memory devices. I think the prebuilt one I downlaoded is for the EVM only. I'm in process of doing board bring up for a customer using the same DDR memory as the Starter Kit. If I load the prebuilt u-boot-spl.bin for the EVM, the DDR is not configured correctly for the customer's board which is same as the starter kit's.

I don't currently have the capability of making u-boot images, so that's why I'm checking if someone else has the prebuilt one for the starter kit that they can just send me so I don't have to make one myself.

Regards,

Mark

The u-boot code configures DDR and other features based on an EEPROM on the board. One field in the EEPROM is the board name. So from board/ti/am335x/board.c:

443         if (board_is_evm_sk(&header))
444                 config_ddr(303, MT41J128MJT125_IOCTRL_VALUE, &ddr3_data,
445                            &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data, 0);
446         else if (board_is_bone_lt(&header))
447                 config_ddr(400, MT41K256M16HA125E_IOCTRL_VALUE,
448                            &ddr3_beagleblack_data,
449                            &ddr3_beagleblack_cmd_ctrl_data,
450                            &ddr3_beagleblack_emif_reg_data, 0);
451         else if (board_is_evm_15_or_later(&header))
452                 config_ddr(303, MT41J512M8RH125_IOCTRL_VALUE, &ddr3_evm_data,
453                            &ddr3_evm_cmd_ctrl_data, &ddr3_evm_emif_reg_data, 0)    ;
454         else
455                 config_ddr(266, MT47H128M16RT25E_IOCTRL_VALUE, &ddr2_data,
456                            &ddr2_cmd_ctrl_data, &ddr2_emif_reg_data, 0);
457 }

The board_is_xxxxx code is based on reading the EEPROM header:

 32 static inline int board_is_bone(struct am335x_baseboard_id *header)
 33 {
 34         return !strncmp(header->name, "A335BONE", HDR_NAME_LEN);
 35 }
 36
 37 static inline int board_is_bone_lt(struct am335x_baseboard_id *header)
 38 {
 39         return !strncmp(header->name, "A335BNLT", HDR_NAME_LEN);
 40 }
 41
 42 static inline int board_is_evm_sk(struct am335x_baseboard_id *header)
 43 {
 44         return !strncmp("A335X_SK", header->name, HDR_NAME_LEN);
 45 }

So unless the customer board has an EEPROM with a header with the A335X_SK header name, DDR probably will not be configured correctly.

Steve K.