> > Specifying the early debug UART > > through cmdline is not standard behavior. > > Note that this is different from the "console" kernel cmdline parameter. > > This is instead about earlyprintk. > > It's possible and well defined to use kernel command line arguments to > specify the earlycon console and earlyprink output channel. earlycon > mappes to console drivers with earlycon support, and earlyprink maps to > a hardcoded list of earlyprintk drivers.
Oh, my mistake then. Thanks for the factual correction. > > I'm pretty sure the routing specified in the fex is phony anyways. > > I do wonder why setting the debug to UART0 (Luc's patch) makes my device > > hang, though. Especially if it is not routed to anything. > > For Allwinner boot, u-boot & kernel the pinmapping specified in the FEX > is applied as specified in the FEX, but only when the hardware for the > section in question is activated. Also it's quite possible that the FEX > file uses incorrect names for the pin mappings, as only the values > matter and not their name. Alright. It is however not used on our sunxi-3.4 code, nor on the U-Boot we maintain. -- Paul Kocialkowski, Replicant developer Replicant is a fully free Android distribution Website: http://www.replicant.us/ Redmine: http://redmine.replicant.us/
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