On Tue, May 27, 2014 at 08:17:43PM -0400, [email protected] wrote: > On Sun, May 25, 2014 at 2:34 PM, Maxime Ripard > <[email protected]> wrote: > > On Sat, May 24, 2014 at 11:50:20AM -0400, [email protected] wrote: > >> I seem to have fried TX on my TTL serial converter. I can't get a new > >> one until Tuesday. I'll see if I can rig things up to boot without > >> needing to type since I can still receive the serial output. > > So my new USB to serial converter came and the kernel boots now. > > Isn't there a way to set the electrical drive strength on the pins?
Yes, there's the allwinner,drive property in the DT for this. > Maybe the drive was ok under earlyprintk and then when the real UART > driver lowered it when it took over. Maybe my old old serial device > was able to correctly read earlyprintk and couldn't understand the > UART driver. Just a guess. > > New one is a different chip CP12xx. Old one was PL23xx. I'm using a PL2301 on a regular basis and it works just fine. Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
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