[oe] Kernel config question

ed nelson enelson1000 at comcast.net
Sun Apr 12 20:14:05 UTC 2009


I am trying to build the console-image for the at91sam9g20-ek development
board running linux 2.6.28.  I have used the at91sam92g20dfc and the
at91sam9263 as examples.  I was hoping Ulf Samuelsson would create the
at91sam9g20ek machine but did not see it in the dev branch yet so I thought
I would try to make it and hopefully get comments from him or Marcin or
someone. I am using the dev branch for the build and built with updates from
pull yesterday.  I have attached the boot log and the defconfig file.

 

I see at least two problems when I look at the boot log.

1. The floating point emulation - Netwinder is not started.  In the
defconfig file
(/openembedded/recipes/linux/linux-2.6.28/at91sam9g20ek/defconfig) I have
the following configured.

#
# Floating point emulation
#

#
# At least one emulation must be selected
#
CONFIG_FPE_NWFPE=y
# CONFIG_FPE_NWFPE_XP is not set
# CONFIG_FPE_FASTFPE is not set
# CONFIG_VFP is not set
But when I look at the .config file under
tmp/work/at91sam9g20ek-angstrom-linux-gnueabi/linux-2.6.28-r7/linux-2.6.28/
all I see is the following.

#
# Floating point emulation
#

#
# At least one emulation must be selected
#
# CONFIG_VFP is not set

If I look at at91sam9g20ek_defconfig in the following directories each file
contains what I have in the defconfig file (has CONFIG_FPE_NWFPE=y).

 
Tmp/staging/at91sam9g20ek-angstrom-linux-gnueabi/kernel/arch/arm/configs

 
Tmp/work/at91sam9g20ek-angstrom-linux-gnueabi/linux-2.6.28-r7/linux-2.6.28/a
rch/arm/configs

 
Tmp/work/at91sam9g20ek-angstrom-linux-gnueabi/linux-2.6.28-r7/staging-pkg/st
aging/ at91sam9g20ek-angstrom-linux-gnueabi/kernel/arch/arm/configs

Does the kernel image (uImage) get built using the
tmp/work/at91sam9g20ek-angstrom-linux-gnueabi/linux-2.6.28-r7/linux-2.6.28
directory?  Why does the .config file not contain the statement for the
floating point emulation?

 

2. It looks like the kernel has problems with the WM8731 audio IC. What is
needed to fix the problem?

Configuring network interfaces... No state is present for card WM8731

/usr/sbin/alsactl: parse:1620: Unable to open file
'/usr/share/alsa/init/00main'

: No such file or directory

No state is present for card WM8731

 

Thanks

Ed

 

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