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?
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 was using this modified for tftp loading. But I was setting fdt high
>> after loading the dtb, not before. Does that make a difference? FDT
>> has to be working or it would have errored out earlier when the
>> machine name didn't match.
>
> No, it doesn't make any difference.
>
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com



-- 
Jon Smirl
[email protected]

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