How to enable printk message on EP9307 (kernel 2.6.8.1)

tamamontu · 02-04-2010, 09:28 PM

Hi Guys,

Can some one please show how to enable printk KERNEL_INFO messages to appear on serial terminal. I am trying to change the lcd device driver ep93xxfb.c So i have add some printk messages in the exsisting driver to see the current configuration of the lcd.

The existing ep93xxfb.c has printk command but nothing is displayed on com port.

I just get this on the terminal
----------------------------------------------------------------------------------------------------------------------------------
+
Ethernet eth0: MAC address 00:00:00:00:68:34
IP: 192.168.254.10
0/255.255.255.0, Gateway: 192.168.254.254
Default server: 192.168.254.254, DNS server IP: 192.168.254.254

RedBoot(tm) bootstrap and debug environment [ROMRAM]
Non-certified release, version v2_0 - built 10:15:31, Feb 5 2010

Platform: Cirrus Logic EDB9307 Board (ARM920T) Rev A
Copyright (C) 2000, 2001, 2002, Red Hat, Inc.

RAM: 0x00000000-0x04000000, 0x00041f68-0x03fbd000 available
FLASH: 0x60000000 - 0x62000000, 128 blocks of 0x00040000 bytes each.
== Executing boot script in 1.000 seconds - enter ^C to abort

RedBoot> fis load ramdisk.gz

RedBoot> fis load zImage

RedBoot> exec -r 0x800000 -s 0xC00000
Using base address 0x0008
0000 and length 0x0012f580

Uncompressing Linux.........................................
............................................ done, booting the kern
el.

Please press Enter to activate this console.

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Thanks in advance.

tamamontu · 02-05-2010, 01:36 AM

when I do cat /proc/sys/kernel/printk

~# cat /proc/sys/kernel/printk
1 8 1 7

if I am not wrong I need to change the console_loglevel.

I am new to this and I am not sure how to change it.

can some one please share some info.