Messages in this thread | | | Date | Sat, 8 Oct 2011 18:59:18 +0530 | Subject | Re: Serieal console on Samsung S3C6410 ARM11 CPU (Was [ANNOUNCE] 3.0.6-rt17) | From | Thomas Abraham <> |
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Hi Juergen,
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
Thanks, Thomas. -- 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/
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