On Tuesday 9. June 2015 17.26.07 Dr. H. Nikolaus Schaller wrote: > > I have to correct myself. > > Yesterday, JZ4740 DT support has found its way into linux-next: > > https://git.kernel.org/cgit/linux/kernel/git/next/linux- next.git/commit/?id=e6382f138edd218dbe7757cf12f0b64e2926400f > > So we definitvely will see it as part of the 4.2-rc series :)
Yes, it looks like the beginning of full device tree support, at least. > A minor problem will be how to boot a DT kernel… We can’t easily modify > U-Boot to load the .dtb and pass its address to the bootm command. > > But it is usually possible to append the DTB before using mkimage to build > an uImage. Then, the kernel startup code will scan the kernel binary for a > DTB. > > I hope this mechanism exists for MIPS as well and not only for ARM. It > needs some CONFIG to be enabled. > > We also use this method for the GTA04 if we boot from NAND. There we also > can’t load a separate DTB (because we have no dedicated partition for it). > > Here is the code that merges an existing uImage and some DTB into a > bootable thing: > > http://git.goldelico.com/?p=gta04-rootfs.git;a=blob;f=config/root/flash- nand;hb=HEAD#l152 I imagine that booting a single payload with appended DT information is probably desirable in many different environments. Indeed, I thought that this was being widely done on the supported platforms already. Paul _______________________________________________ Mipsbook-devel mailing list Mipsbook-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/mipsbook-devel
