Hi Lukasz >> The problem here is, how o flash the images first time to fresh >> boards to QSPI or eMMC device, where there is no MMC/SD boot >> option available. The solution to this problem is use peripheral USB >> boot mode (configuring sysboot switches), where the ROM loads the >> intial SPL(+DFU builtin for spi/eMMC) to IRAM, then run dfu/sf or >> dfu/eMMC to flash the binaries from PC using USB interface. Refer to >> SPL-DFU support based on 2014.07 u-boot >> http://www.ti.com/lit/an/sprac33/sprac33.pdf.
>I know about similar bootstrap (on TI board), which uses serial instead of USB. >In this approach MLO was loaded by serial, then it loaded u-boot, which was >responsible for factory setting of the device (flashing rootfs, boot and other >partitions). >One question: >Would it be possible to develop SPL (MLO) for your platform, which does >following things: >1. Loads the full-fledge u-boot to SDRAM 2. Starts the u-boot and 3. u-boot >flash all the needed stuff >By using such approach we could restrict our dfu support in SPL u-boot only to >receiving data and uploading it to SDRAM (i.e. we wouldn't need to add write >support for ext, fat and eMMC). This is not possible, because combining MLO and u-boot.img will not fit in IRAM (512k). The u-boot.img itself is around 640K. Regards Ravi _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
