lkml.org 
[lkml]   [2014]   [Apr]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC 0/5] of: Automatic console registration cleanups
On Mon, Mar 31, 2014 at 10:41:24AM +0100, Grant Likely wrote:
> On Mon, 31 Mar 2014 09:10:15 +0200, Sascha Hauer <s.hauer@pengutronix.de> wrote:
> > On Fri, Mar 28, 2014 at 09:08:00AM -0700, Grant Likely wrote:
> > > Hi all,
> > >
> > > This is a series that I've been playing with over the last few days to
> > > clean up the selection of default console devices when using the device
> > > tree. The device tree defines a way of specifying the console by using a
> > > "stdout-path" property in the /chosen node, but very few drivers
> > > actually attempt to use that data, and so for most platforms there needs
> > > to be a "console=" line in the command line if a serial port is intended
> > > to be used as the console.
> > >
> > > With this series, if there is a /chosen/stdout-path property, and if
> > > that property points to a serial port node, then when the serial driver
> > > registers the port, the core uart_add_one_port() function will notice
> > > and if no console= argument was provided then add it as a preferred
> > > console.
> > >
> > > I've not tested this very extensively yet, but I want to get some
> > > feedback before I go further.
> >
> > I gave it a test on i.MX. It works as expected with both
> > linux,stdout-path and stdout-path. Specifying a console on the
> > commandline still works and overrides the devicetree setting.
> >
> > Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
>
> Brilliant! Thanks Sascha.
>
> Can you supply a patch to add stdout to the imx dts files?

The information which console is used on each board is not in the
kernel. I can create a patch adding stdout for a handful of boards I
know, but I won't catch all.

Sascha

--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |


\
 
 \ /
  Last update: 2014-04-01 10:29    [W:0.090 / U:1.212 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site