Subject: [PATCH 2/2] ARM: dts: sun8i: enable UART1 for iNet D978 Rev2 board

From: [email-masked] (Maxime Ripard)
Date: Thu, 25 Aug 2016 22:47:26 +0200

On Thu, Aug 25, 2016 at 10:12:35PM +0800, Icenowy Zheng wrote:
> >> ?But many codes will require a ttyS0 as console... So I think the
> >> ?bluetooth should be located at ttyS1...
> >
> > Most of them would use /dev/console anyway. What do you have in mind?
> 
> As a general configuration, /dev/ttyS0 will be indicated as the default console=
> value... (Otherwise more boards will fail)

There's no reason to make that assumption. The console might be on
another UART entirely (ttyS3, for the sake of the argument), on a
different UART "class" (ttyUSB?, framebuffer console?), or not present
at all.

If you want to use the console, use /dev/console.

I don't what's so special about the UART here. Every single device in
Linux behaves that way.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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