Hi, On 10 March 2015 at 23:48, Masahiro Yamada <yamada.masah...@socionext.com> wrote: > Hi Yehuda, Tom, Simon, > > > > 2015-03-07 0:12 GMT+09:00 Tom Rini <tr...@konsulko.com>: >> On Thu, Mar 05, 2015 at 06:20:35PM +0000, Yehuda Yitschak wrote: >>> Hey Tom >>> >>> In arch/arm/dts/Makfile: line 56 >>> "DTC_FLAGS += -R 4 -p 0x1000" >>> >>> this tell the dtc tool to add a 4K padding to the device tree blob. >>> >>> i can't figure out why this is needed. >>> Its creating a 4KB penalty on the dtb file so i guess it has some >>> justification. >> >> That's interesting and I don't see a corresponding thing in the kernel. >> Masahiro? This dates back to the introduction of the Makefile and >> that's you in the git log, thanks! > > Not me! > I just converted the Makefile into Kbuild style. > > > The option "-R 4 -p 0x1000" was introduced by: > > commit bbb0b128c3956ac549471addc314702fbe0ace63 > Author: Simon Glass <s...@chromium.org> > Date: Sat Oct 15 05:48:21 2011 +0000 > > fdt: Add support for embedded device tree (CONFIG_OF_EMBED) > > > Simon, > Looks like the 4K padding was introduced by you. > Can you explain why?
I think at the time perhaps we were thinking of modifying the FDT in early U-Boot init, but that did not happen. I think it can be dropped. Using my time machine I just sent a patch to do this a few weeks ago: http://patchwork.ozlabs.org/patch/444847/ Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot