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[FAQ] AM64x: How to customize QSPI/OSPI flash layout for SPL/u-boot booting from QSPI/OSPI with TI AM64x Linux SDK

Hong Guan64
Guru 65135 points

I’m working on customer board porting, and want to know how to modify QSPI/OSPI flash layout for SPL/u-boot booting from QSPI/OSPI with TI AM64x Linux SDK.

  • 0
    TI__Guru 65135 points

    Let me use Linux SDK u-boot build for AM64x EVM as an example, where the QSPI/OSPI flash layout offsets for the two A53 u-boot binary (tispl.bin and u-boot.img) are defined in the two defconfig files. The two offset configuration from SDK8.2 and on-wards as listed below, and the same two offsets were 0x80000, & 0x280000 before SDK 8.2
    - SDK 8.2 and on-wards:

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    /configs/am64x_evm_r5_defconfig
    CONFIG_SYS_SPI_U_BOOT_OFFS=0x100000 => tispl.bin
    /configs/am64x_evm_a53_defconfig
    CONFIG_SYS_SPI_U_BOOT_OFFS=0x300000 => u-boot.img
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    It is important to do the followings when porting u-boot for customer board:
    1/. modify the two offsets to match the customer QSPI/OSPI flash layout
    2/. use the exact same offsets for QSPI/OSPI flashing and booting

    There's an early e2e post on the same topic on AM65x OSPI offset
    e2e.ti.com/.../4092657