Re: 2.6 kernel hangs after loading device tree

Hi,
      I got a solution to this.The problem was with the current speed
parameter in the DTS,as stated.You need to explicity specify the
speed.It doesnot get filled in from U-boot.You can also probabaly
check the kernel log buf to see what values are set for these
parameters.Anyways,changing the current speed made it work me and my
2.6 kernel is now up.

Thanks.
Charanya.

Date: Mon, 19 Nov 2007 16:08:03 -0800 (PST)
From: abhi_linux <redacted>
Subject: Re: 2.6 kernel hangs after loading device tree
To: linuxppc-embedded@ozlabs.org
Message-ID: [ref]
Content-Type: text/plain; charset=us-ascii


Hello
Did u get a solution to this? I have similar issues. How do u enable
debugging in UBoot?
Thanks

charanya venkatraman wrote:

quoted

Hi all
       Sorry about the previous mail.Got sent  by mistake.

Iam using the 2.6.22.5 kernel on MPC 8560 and MPC8540 on my custom
board.Mykernel hangs after loading the device tree in both the
processors .There is
no output on the serial port after loading the device tree.Am using U-boot
1.2.0 as the bootloader.After enabling debug in u-boot i could see that
the
control is getting transferred to the kernel after which it hangs.Earlier
i
tried using 2.6.21 which also hangs at the same point.The config files
used
were MPC8540ADS_defconfig and MPC8560ADS_defconfig under powerpc
directory.
The changes that were made to the device tree are:
1.The reg and ranges properties of the soc node have been changed to
account
for the change in CCSRBAR of my board.
2.Removed the PCI,mdio nodes and ethernet nodes since i dont need support
for these as of now.

I have tried the following console arguments:
MPC8540: bootargs root=/dev/ram rw console=ttyS0,115200
MPC8560:bootargs root=/dev/ram rw console=ttyCPM0,115200

Any help on this issue??

Thanks.
Charanya.