After some valuable info received from Brad (see comment on my earlier article, at http://rglinuxtech.com/?p=1723 ), I found the complete set of four patches for initial C2 U-Boot support, and applied these to the latest (May 9) GIT version of U-Boot.. Thanks are also due to Beniamino Galvani for producing these patches.. Detailed instruction on how to … Continue reading →
I discovered there was a later version (6) of the U-boot patch for the Odroid C2, and also – after more research – found the reason for the compile error… It turns out that the GIT version (May 5, 2016) of U-boot currently needs two patches.. The first one is to provide psci_system_reset for armv8, and details … Continue reading →
I decided to check the latest linux-next tree for signs of Odroid C2 code, and there is some there – apparently for basic functionality.. Compiled OK, but when I tried to boot it, the Hardkernel-supplied version of U-Boot crashed: odroidc2#ext4load mmc 0:1 ${loadaddr} /boot/uboot/Image 7748608 bytes read in 187 ms (39.5 MiB/s) odroidc2#ext4load mmc 0:1 ${dtb_loadaddr} /boot/uboot/meson-gxbb-odroidc2.dtb … Continue reading →
If you need a particular rootfs for an ARM7 or ARM64 device, there is a source of these at http://libguestfs.org/download/builder/ As an example, for Fedora 23 aarch64, then download the http://libguestfs.org/download/builder/fedora-23-aarch64.xz file, and then expand it (I use ark..) This will give you a file fedora-23-aarch64, and simply rename this to fedora-23-aarch64.img. As the Fedora aarch64 images … Continue reading →
After more ‘investigation’, I managed to find a working U-Boot for a 64-bit boot of the Raspberry Pi 3, by copying it from the boot directory of this: http://www.tom-yam.or.jp/rpi3/rpi3-arm64-debian-20160414.img.xz found towards the end of the latest 64-bit thread on the Pi Forum: https://www.raspberrypi.org/forums/viewtopic.php?f=72&t=137963&sid=cd15abd8d4dd2a2d5c517f47a3e4f5e4&start=125 . Thanks to xyinao for putting it all together.. I copied the kernel Image … Continue reading →
I had ordered a Raspberry Pi 3 back in March in the hope that it would be a useful exercise in 64-bit on a different chipset.. I was (somewhat) disappointed to find that there was no initial 64-bit support, and indeed that I had been a bit of a pioneer in even running armv7 code on my … Continue reading →
I recently acquired on of the rather quirky Geekbox ARM64 devices, together with the oddly-named ‘Landingstrip’ expansion board.. http://www.cnx-software.com/2015/11/19/geekbox-is-a-hackable-android-and-linux-tv-box-powered-by-rockchip-rk3368-soc/ http://forum.geekbox.tv/ The similarity in overall design to the ARMv7 Radxa Rock2 will be seen from the photo: If you are ordering one, it is worth getting the USB/UART connector as well, as the 3-pin micro flat-pin connection is … Continue reading →
Just acquired a 64-bit Odroid C2: As usual, I installed Fedora 23 aarch64 on it: Fedora 23 (Twenty Three) Kernel 3.14.29 on an aarch64 (ttyS0) ………………… # uname -a Linux rgc2 3.14.29 #1 SMP PREEMPT Wed Mar 9 11:14:41 PST 2016 aarch64 aarch64 aarch64 GNU/Linux The only kernel source available – so far – is a heavily-patched … Continue reading →
Updated the DragonBoard 410c to Kernel 4.2.4: # git clone https://git.linaro.org/landing-teams/working/qualcomm/kernel.git -b release/qcomlt-4.2 and this version boot/runs OK.. I am running these systems ‘headless’, so have not been able to test monitor/display capabilities.. Fedora 23 (Twenty Three) Kernel 4.2.4 on an aarch64 (ttyMSM0) ……………… # uname -a Linux rg410c 4.2.4 #1 SMP PREEMPT Wed Nov 11 04:12:36 … Continue reading →
One of the shortcomings of the DragonBoard 410c was that it relied on the Android-phone-centric fastboot for any Kernel updates, but now there is a version of U-Boot available, thanks to Mateusz Kulikowski.. This is very much a work-in-progress, but I thought I would give it a try… I started with the version at https://github.com/hallor/u-boot/tree/dragonboard-2015.11.01, and made … Continue reading →