06:55 <crb_> when using dtc, what does it mean when it's "Unable to merge node: ttc0"

11:35 <LeSpocky> hello

11:35 <LeSpocky> is it possible to make arithmetic calculations in u-boot scripts?

11:36 <LeSpocky> (add an offset to a memory address)

11:48 <LeSpocky> I think 'setexpr' should work

14:56 <rfs613> crb_: does your dts file(s) use #include statements? if so, you need to run them through cpp (the C pre-processor) before using dtc.

15:24 <crb_> rfs613: yes that was confusing, on my platform dtc supports /include/ natively not #include

15:25 <crb_> rfs613: thank you!

15:30 <rfs613> crb_: sorry if I added to the confusion... but the error you reported typically means you have a node reference like &ttc0 { stuff-goes-here; } and dtc cannot find the actual tty0 node, because it has been defined in an #included file.

15:32 <crb_> rfs613: no no, you were spot on. I came to that conclusion about 4 AM and realized that my etc was not issuing an error on the #include "blah" file but was issuing the error I pasted for node that were in the include file which wasn't processed. I changed from #include to /include/ and things just worked

15:33 <crb_> rfs613: I didn't mean that you comment was confusing, but rather the problem was confusing since the bad include line wasn't flagged

15:40 <rfs613> crb_: note that you can get the u-boot makefiles to run dtc for you (along with cpp etc). The easiest way is "make dtbs", which in turn means you have to add your dtb names to arch/arm/dts/Makefile (or whichever architecture you're on).

16:03 <crb_> rfs613: yes I have u-boot building and working fine. I was building custom dtb files for the OS I'm using that have custom hardware I'm designing so I want to build the dtb as part of the driver build framework for that OS

16:04 <crb_> rfs613: the problem was the dtc on my os is slightly different than the one used to build u-boot on my os and I go bit by this difference for a little bit.

16:05 <rfs613> crb_: okay ;-)

16:07 <crb_> rfs613: but I do thank you for responding. I could have been stuck there forever except I notice my dtb built in my OS was WAY smaller than the u-boot dtb when it should have been larger since it's more complete

16:09 <rfs613> crb_: welcome.. the channel has been fairly quiet lately, I suspect a lot of folks are off on summer holidays...

19:17 <marex> LeSpocky: setexpr, yes

19:17 <marex> LeSpocky: that can even do regex substitution