lkml.org 
[lkml]   [2011]   [Oct]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Serieal console on Samsung S3C6410 ARM11 CPU (Was [ANNOUNCE] 3.0.6-rt17)
Date
Hi Thomas,

Thomas Abraham wrote:
> On 8 October 2011 16:56, Juergen Beisert <jbe@pengutronix.de> wrote:
> > Thomas Gleixner wrote:
> >> I'm pleased to announce the 3.0.6-rt17 release.
> >
> > I have no idea where to search, but when I'm using the 3.0.6-rt17 on my
> > Samsung S3C6410 ARM based system, the UART (serial console) does not work
> > as expected. Typing only one char at a time is okay. Typing two chars
> > immediately makes the system using 100 % CPU load and takes about 2
> > seconds to respond. It seems the interrupt handling is broken in the UART
> > driver, but I don't know how to fix it.
> >
> > This with a simple cursor up (one char to get the last command) and a
> > small pause to the next "ENTER" char:
> >
> > root@mini6410:~ cat /proc/interrupts | grep 18:
> >  18:    5739107  s3c-uart  s3c6400-uart
> >
> > Same again:
> >
> > root@mini6410:~ cat /proc/interrupts | grep 18:
> >  18:    5739113  s3c-uart  s3c6400-uart
> >
> > 6 interrupts seems reasonable.
> >
> > Now with cursor up and SPACE immediately, then a pause for ENTER:
> >
> > root@mini6410:~ cat /proc/interrupts | grep 18:
> >  18:    5923815  s3c-uart  s3c6400-uart
> >
> > 184702 interrupts looks strange.
>
> Just curious, do you have the following two commits?
>
> serial: samsung: Add unified interrupt handler for s3c64xx and later SoC's
> ARM: SAMSUNG: Remove uart irq handling from platform code

Are they part of the current 3.0.6 vanilla kernel? I'm only using the vanilla
3.0.6 with rt17 on my target.

jbe

--
Pengutronix e.K. | Juergen Beisert |
Linux Solutions for Science and Industry | http://www.pengutronix.de/ |
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2011-10-08 20:17    [W:0.044 / U:1.572 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site