[Buildroot] how to add UART1,2,3 on beaglebone

[Baruch Siach <baruch@tkos.co.il>]

Hi Jehun Lee,

On Tue, Jul 19, 2016 at 09:07:26PM -0700, Jehun Lee wrote:
> I made and load successfully on my beaglebone black by following docs on
> https://buildroot.org/docs.html.
> But that image has only one ttyO0 for console. I want to add UART1,2,3 of
> beaglebone black.
> How can I do that? Any advice?

You need to add getty entries in your target /etc/inittab file. Look for 
'ttyO0' in /etc/inittab, and add similar entries for ttyO{1,2,3}.

This assumes that you are using either Busybox init (most likely) or sysvinit. 
If you use systemd, add a symlink in /etc/systemd/system/getty.target.wants/ 
for each console.

Hope this helps,
baruch

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