Thank you, definitely valuable tips! :-) On Thursday, May 15, 2014 3:14:39 AM UTC+3, RobertCNelson wrote: > > > > > On Wed, May 14, 2014 at 7:07 PM, Gilco333 <[email protected]<javascript:> > > wrote: > >> Wow, thank you Robert for the super quick answer :-) >> >> A short question before I'll read and delve into more depth about the >> subject: >> I have noticed during the boot process, the beagleboard-xM (rev B) prints >> on screen: >> >> "reading /dtbs/omap3-beagle-xm-ab.dtb >> 60695 bytes read in 13 ms (4.5 MiB/s) >> ## Error: "expansion_args" not defined >> > > That's just an old variable in u-boot for the old "board" file boot. (the > buddy=spidev etc crap) > > >> >> Kernel image @ 0x80300000 [ 0x000000 - 0x3e2f38 ] >> ## Flattened Device Tree blob at 815f0000 >> Booting using the fdt blob at 0x815f0000 >> Using Device Tree in place at 815f0000, end 81601d16 >> >> Starting kernel .." >> >> So I searched for the omap3-beagle-xm-ab.dts (on linux_kernel-3.14.4 >> source) in order to modify it. but couldn't find it, found only >> omap3-beagle-xm.dts >> googled and found only this skinny file: omap3-beagle-xm-ab.dts, which >> contains: >> > > Yeah, just got merged to mainline a few weeks back. > > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/omap3-beagle-xm-ab.dts?id=refs/tags/v3.15-rc5 > > >> /include/ "omap3-beagle-xm.dts" >> >> /* On Rev A/B USBHOST_PWR_EN is active high */ >> >> &hsusb2_power { >> >> enable-active-high; >> >> }; >> >> Is it the correct file? which I should: >> 1) modify >> 2) compile it to dtb >> 3) overwrite the exist file in /boot/uboot/dtbs/omap3-beagle-xm-ab.dtb >> > > > It's actually way easier to just "decompile" it with dtc, then recompile > it again. > > dtc -I dtb -O dts omap3-beagle-xm-ab.dtb > omap3-beagle-xm-ab.dts > > Regards, > > -- > Robert Nelson > http://www.rcn-ee.com/ >
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