Hi Rogan, On Thu, Jun 22, 2023 at 7:09 PM Rogan Dawes <ro...@dawes.za.net> wrote: > > I tried to follow your suggestion, but so far I have been unsuccessful. > > I cloned Linus' latest source code, and then did: > > make ARCH=arm mxs_defconfig > make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- > cat arch/arm/boot/zImage ./arch/arm/boot/dts/imx28-evk.dtb > > arch/arm/boot/zImage_with_dtb
Do you have access to the Wink Hub v1 board schematics? What about the original U-Boot and kernel source? You are using imx28-evk.dtb here, but not sure if the console pins are the same for the two boards. It is better to create a minimal devicetree specific for Wink Hub v1. To start with, you can only describe the duart node there. > cd arch/arm/boot > mkimage -T kernel -A arm -O linux -a 0x40008000 -e 0x40008000 -C none -d > ./zImage_with_dtb uImage_with_dtb > > then copied onto the Wink hub and did: > > flash_erase /dev/mtd4 0 0 > nandwrite -p -m /dev/mtd4 uImage_with_dtb > reboot > > I then interrupted u-boot, and had to update the number of bytes read from > the mtd4 partition (was 0x00400000, now 0x00600000), as the new kernel was > about 4 times larger than the vendor kernel, and I was getting checksum > errors due to only partial read of the image. > > setenv app_boot 'run appboot_args && nand read ${loadaddr} app-kernel > 0x00600000 && bootm ${loadaddr}' > run app_boot > > NAND read: device 0 offset 0x2b00000, size 0x600000 > 6291456 bytes read: OK > ## Booting kernel from Legacy Image at 42000000 ... > Image Name: > Created: 2023-06-22 21:37:11 UTC > Image Type: ARM Linux Kernel Image (uncompressed) > Data Size: 6279041 Bytes = 6 MiB > Load Address: 40008000 > Entry Point: 40008000 > Verifying Checksum ... OK > Loading Kernel Image ... OK > > Starting kernel ... > > And it stopped there after dumping some garbage to the screen. You should also pass the kernel command line: console=ttyAMA0,115200n8 As far as I recall, the 2.6.35 kernel used a different console device. Can you share the U-Boot log of the board booting the 2.6.35 kernel? > I did note that the mxs_defconfig did not define the appended DTB config, so > I updated my .config as follows: > > $ grep DTB .config > CONFIG_ARM_APPENDED_DTB=y > CONFIG_ARM_ATAG_DTB_COMPAT=y > CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER=y > # CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is not set One thing you could also try is to load U-Boot via USB using this tool: https://source.denx.de/denx/mxsldr To build U-Boot for mx28, please check: https://source.denx.de/u-boot/u-boot/-/blob/master/doc/imx/common/mxs.txt