<font face="Default Sans Serif,Verdana,Arial,Helvetica,sans-serif" size="2"> Hi , <br><br><pre>Did you measure the junk characters or the 'working' serial output. The<br>question is whether the baud rate really changes.<br> -- Yes. we have measured the baud rate when the junk characters starts coming. <br><br>Please send in patches of your modifications so people here can have a<br>look to what you did.<br> -- Please find the patches [please find the attachment . ]<br><br>You seem to have omitted the root= parameter. But frankly, I don't<br>understand why you're doing all that. Why don't let the bootloader pass<br>the options? The hard-coded config is only a fallback for bootloaders<br>that don't provide a cmdline tag.<br> -- Our boot loader is customized by vendor. So no option to change the command line options.<br><br></pre>Thanks and regards, <br><br>Vadivelan M<br><br><font color="#990099">-----Daniel Mack <daniel@caiaq.de> wrote: -----</daniel@caiaq.de></font><div><blockquote style="border-left: 2px solid black; padding-right: 0px; padding-left: 5px; margin-left: 5px; margin-right: 0px;">To: Vadivelan M <vadivelan.m@tcs.com><br>From: Daniel Mack <daniel@caiaq.de><br>Date: 11/17/2009 12:48PM<br>cc: linux-arm-kernel@lists.infradead.org, linux-arm@lists.infradead.org<br>Subject: Re: imx27 - hanging at freeing init memory -- getting some junk characters here after on console ..<br><br><pre>On Tue, Nov 17, 2009 at 09:34:44AM +0530, Vadivelan M wrote:<br>> As you have suggested we tried on main line kernel also. It is hanging at<br>> the same point...<br>> <br>> Freeing init memory..<br>> After this some junk characters.<br>> <br>> We have measured the baud rate through CRO. It shows 8.6 us (115200) which<br>> is correct.<br><br>Did you measure the junk characters or the 'working' serial output. The<br>question is whether the baud rate really changes.<br><br>> Platform dependent changes<br>> Platform : IMX27ads board<br>> clock changes & memory changes<br>><br>> will there be any platform dependency with UART driver?<br>> We did not do any modification here. It seems both the lower<br>> version kernel and higher version kernel is same.<br><br>Please send in patches of your modifications so people here can have a<br>look to what you did.<br><br>> Already working lower version kernel is not taking the command line<br>> arguments [ passed from the CONFIG ]<br>> its taking the boot loader arguments only. so we just did a<br>> hack so that it will take our CONFIG command line arguments.<br>> [commented strlcpy() @ arch/arm/kernel/setup.c - fn :<br>> parse_tag_cmdline ]<br>> we are getting error : kernel panic - not syncing VFS: unagle<br>> to mount roof fs on unknown-block(1,0)<br><br>You seem to have omitted the root= parameter. But frankly, I don't<br>understand why you're doing all that. Why don't let the bootloader pass<br>the options? The hard-coded config is only a fallback for bootloaders<br>that don't provide a cmdline tag.<br><br>Daniel<br><br><br><br>> -----Daniel Mack wrote: -----<br>> <br>> To: Vadivelan M <vadivelan.m@tcs.com><br>> From: Daniel Mack <daniel@caiaq.de><br>> Date: 11/10/2009 12:19PM<br>> cc: linux-arm-kernel@lists.infradead.org, linux-arm@lists.infradead.org<br>> Subject: Re: imx27 - hanging at freeing init memory -- getting some junk<br>> characters here after on console ..<br>> <br>> On Fri, Nov 06, 2009 at 11:12:03AM +0530, Vadivelan M wrote:<br>> > I have checked the inittab. the baud rate is correct.<br>> ><br>> > When i am passing command line arguments "init=bin/sh<br>> > consloe=ttymxc0,115200 root=/dev/ram rw ip=off"<br>> ><br>> > same status. i can see the print Freeing init memory and some uart<br>> > function prints...<br>> ><br>> > After that only junk characters are coming.<br>> ><br>> > we have checked serial drivers . almost no changes between 2.6.19(working<br>> > kernel) and 2.6.27<br>> ><br>> > Please help us to go forward.....<br>> <br>> Sorry, I don't know then. I was sure you're facing a baud rate issue,<br>> which also is a common pitfall.<br>> <br>> Can you try using a current mainline git kernel and see if the problem<br>> persists? Your machine type (MX27ADS) should be supported.<br>> <br>> Daniel<br>> <br>> =====-----=====-----=====<br>> Notice: The information contained in this e-mail<br>> message and/or attachments to it may contain<br>> confidential or privileged information. If you are<br>> not the intended recipient, any dissemination, use,<br>> review, distribution, printing or copying of the<br>> information contained in this e-mail message<br>> and/or attachments to it are strictly prohibited. If<br>> you have received this communication in error,<br>> please notify us by reply e-mail or telephone and<br>> immediately and permanently delete the message<br>> and any attachments. Thank you<br></pre>
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