From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ILEX5.IL.NDS.COM (jeru1.ndsisrael.com [192.118.34.248]) by ozlabs.org (Postfix) with ESMTP id A1D44682F4 for ; Wed, 21 Sep 2005 21:33:41 +1000 (EST) MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Date: Wed, 21 Sep 2005 14:33:39 +0300 Message-ID: <02AA386EB831044F8537A696BA785C78076299@ILEX5.IL.NDS.COM> From: "Landau, Bracha" To: "Vitaly Bordug" Cc: linuxppc-embedded@ozlabs.org Subject: RE: using SCC4 on MPC8272ADS List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , I reconfigured the kernel so that only SCC1 and SCC4 are supported. The s= ame thing happens as before. Another bit of info is that if I run with console=3DttyCPM1 as a kernel c= ommand line parameter, so that u-boot outputs to one port and the kernel = outputs to the other, if I type "ls > /dev/ttyCPM0" the system hangs. -----Original Message----- From: Vitaly Bordug [mailto:vbordug@ru.mvista.com] Sent: Wednesday, September 21, 2005 1:56 PM To: Landau, Bracha Cc: linuxppc-embedded@ozlabs.org Subject: Re: using SCC4 on MPC8272ADS Landau, Bracha wrote: > I am using the MPC8272ADS with kernel 2.6.10. The kernel is configured = to support 4 CPM SCCs, of which 1 and 4 are connected on the board. > I created device files as follows: >=20 > mknod /dev/ttyCPM0 c 204 46 > mknod /dev/ttyCPM1 c 204 47 > mknod /dev/ttyCPM2 c 204 48 > mknod /dev/ttyCPM3 c 204 49 >=20 > If I boot the kernel using console=3DttyCPM3 I see that it uses SCC4. B= ut when I boot with console=3DttyCPM0 and write to the second port using = a command like "echo hello > /dev/ttyCPM3" I don't see that anything is b= eing outputted to the second console. >=20 > What am I doing wrong? > =20 Funny - you said that SCC 1 and 4 are connected to the board; than why=20= you are enabling SCC2 and SCC3? This board does have 2 SCCs assigned for UARTs. No need to configure=20 SCC2 and SCC3 - this is useless and may lead to kernel crash. This board=20= will use in the correct configuration /dev/ttyCPM0 and=20 /dev/ttyCPM1 . --=20 Sincerely, Vitaly *************************************************************************= ********** Information contained in this email message is intended only for use of t= he individual or entity named above. If the reader of this message is not= the intended recipient, or the employee or agent responsible to deliver = it to the intended recipient, you are hereby notified that any disseminat= ion, distribution or copying of this communication is strictly prohibited= =2E If you have received this communication in error, please immediately = notify the postmaster@nds.com and destroy the original message. *************************************************************************= **********