Messages in this thread | | | Date | Thu, 25 Aug 2016 22:47:26 +0200 | From | Maxime Ripard <> | Subject | Re: [PATCH 2/2] ARM: dts: sun8i: enable UART1 for iNet D978 Rev2 board |
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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 [unhandled content-type:application/pgp-signature] | |