Hi Rogan, On Thu, Jun 15, 2023 at 9:00 AM Rogan Dawes <ro...@dawes.za.net> wrote: > > Hi folks, > > I am trying to boot a custom kernel on a Wink Hub v1, which has an i.MX28 > CPU, and is running U-Boot (U-Boot 2014.01-14400-gda781c6-dirty (Apr 30 > 2014 - 22:35:38)). > > I have tried compiling my own modern kernel and putting it in place of the > vendor (Linux version 2.6.35.3-flex-dvt) kernel on the flash chip, but when > loading, I simply get the expected U-Boot loading messages, but then > nothing at all from the serial port after that. > > I'm trying to figure out where my problem is most likely to be. As far as I > am aware from long-ago poking at U-Boot, the way that U-Boot passes > arguments to the kernel has changed recently? Previously it was ATAGS, and > now it expects a Device Tree Blob? Might this explain the failure to boot > that I am seeing? And yes, I understand that given that
Yes, to boot a modern kernel, you need to generate a devicetree for the Wink Hubv1 board. Then you build it and generate a .dtb file. To boot zImage + dtb using an old bootloader that does not support booting dtb, you would need to select the following options in the kernel: CONFIG_ARM_APPENDED_DTB=y CONFIG_ARM_ATAG_DTB_COMPAT=y And then: cat arch/arm/boot/zImage arch/arm/boot/dts/imx28-wink-hub-v1.dtb > zImage_with_dtb And then boot zImage_with_dtb as you do with 2.6.35. Ideally, you should also port a modern U-Boot version, which supports dtb by default and then you don't need the steps above. Take a look at board/freescale/mx28eevk support for a reference. Regards, Fabio Estevam
