Kernel Hacking
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Kernel Hacking
by Mike Caruso
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Hello list,
I was wondering if anybody knew how to build a custom kernel for a Verdex running Open Embedded? I have a USB Ethernet adapter I'd like to get working on my Verdex, it uses the RTL8150 driver. My first thought was to try and add it to gumstix-custom-verdex.conf, but wouldn't you need to enable it in the kernel config first so that it knows to build that module? I found what appears to be the kernel config in: ~/gumstix/gumstix-oe/tmp/work/gumstix-custom-verdex-angstrom-linux-gnueabi/gumstix-kernel-2.6.21-r1/linux-2.6.21 So let's say I modify that to include the RTL8150 driver (as a module), how would I rebuild the Verdex image to include a kernel built from that config? Thanks, Mike ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ gumstix-users mailing list gumstix-users@... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
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Re: Kernel Hacking
by Mark Barton-2
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Mike Caruso wrote:
> Hello list, > I was wondering if anybody knew how to build a custom kernel for a > Verdex running Open Embedded? I have a USB Ethernet adapter I'd like > to get working on my Verdex, it uses the RTL8150 driver. My first > thought was to try and add it to gumstix-custom-verdex.conf, but > wouldn't you need to enable it in the kernel config first so that it > knows to build that module? I found what appears to be the kernel > config in: > > ~/gumstix/gumstix-oe/tmp/work/gumstix-custom-verdex-angstrom-linux-gnueabi/gumstix-kernel-2.6.21-r1/linux-2.6.21 > > So let's say I modify that to include the RTL8150 driver (as a > module), how would I rebuild the Verdex image to include a kernel > built from that config? > > Thanks, > Mike > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > ------------------------------------------------------------------------ > > _______________________________________________ > gumstix-users mailing list > gumstix-users@... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > http://gumstix.net/wiki/index.php?title=Kernel_Reconfiguration Not sure how complete since I have not tried this yet, but it might do the trick. Mark ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ gumstix-users mailing list gumstix-users@... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
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Re: Kernel Hacking
by Lord Serega
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for me rebuild command did not produce the right results
On Tue, May 20, 2008 at 3:21 PM, Mark Barton <mark@...> wrote:
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Re: Kernel Hacking
by Mathias Bage
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On Tue, 20 May 2008, Sergiy Fefilatyev wrote: > for me rebuild command did not produce the right results I had problems with kernel compiles too. After googling and trying some bitbake commands, I noticed that you can't (re)compile the kernel with 'bitbake -c rebuild gumstix-kernel' -- 'rebuild' will download and unpack a fresh kernel source and then copy the file: gumstix-oe/com.gumstix.collection/packages/linux/gumstix-kernel-2.6.21/gumstix-custom-verdex/defconfig to the file (assuming a uclibc target system and linux kernel version 2.6.21): gumstix-oe/tmp/work/gumstix-custom-verdex-angstrom-linux-uclibcgnueabi/gumstix-kernel-2.6.21-r1/linux-2.6.21/.config So, if you use 'bitbake gumstix-kernel -c rebuild' after a linux kernel menuconfig (using 'bitbake gumstix-kernel -c menuconfig'), your kernel .config file (path above) will have been overwritten by Gumstix Inc's default file (the .../defconfig file (see 11 lines above)) To avoid this problem, I did the following; bitbake gumstix-kernel -c menuconfig bitbake gumstix-kernel -f -c compile bitbake gumstix-kernel bitbake -c rebuild task-base-gumstix bitbake -c rebuild gumstix-directfb-image (replace gumstix-directfb-image with your preferred image name) The '-f' is used to force a '-c compile'. > > On Tue, May 20, 2008 at 3:21 PM, Mark Barton <mark@...> wrote: > >> Mike Caruso wrote: >>> Hello list, >>> I was wondering if anybody knew how to build a custom kernel for a >>> Verdex running Open Embedded? I have a USB Ethernet adapter I'd like >>> to get working on my Verdex, it uses the RTL8150 driver. My first >>> thought was to try and add it to gumstix-custom-verdex.conf, but >>> wouldn't you need to enable it in the kernel config first so that it >>> knows to build that module? I found what appears to be the kernel >>> config in: /Mathias ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ gumstix-users mailing list gumstix-users@... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
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Re: Kernel Hacking
by Pauley, John C-2
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I believe the problem of supplying your own kernel config has answered
though not directly or definitively (that I could find)... See http://www.nabble.com/Switching-from-Buildroot-to-OE-%28Open-Embedded%29 -to14713242.html#a14720004, which gives the basic concept. I'll attempt to summarize what I've done with the kernel (though TODO's still remain). Hope it's the OE way:). Hope this helps and that I haven't forgot anything... Assumes you in your gumstix-oe directory and you've already successfully baked gumstix-*-image: Get base kernel package into your user.collection: gumstix-oe]$ mkdir -p user.collection/packages/linux gumstix-oe]$ cp -r com.gumstix.collection/packages/linux/* user.collection/packages/linux/ Make kernel changes (note I'm using connex platform): gumstix-oe]$ cd tmp/work/gumstix-custom-connex-angstrom-linux-gnueabi/gumstix-kernel-2.6 .21-r1/linux-2.6.21/ linux-2.6.21]$ make ARCH=arm menuconfig [Make your changes and save] Copy the new kernel configuration to be your default config: linux-2.6.21]$ cat .config > ~/gumstix-oe/user.collection.packages/linux/gumstix-kernel-2.6.21/gumsti x-custom-connex/defconfig Rebuild: gumstix-oe]$ bitbake -c rebuild gumstix-kernel gumstix-oe]$ bitbake -c rebuild task-base-gumstix gumstix-oe]$ bitbake -c rebuild gumstix-*-image Now you have your [default] custom kernel config completely independent of what gets delivered in com.gumstix... Note I followed similar concepts (start with copy of com.gumstix.collection/package/foo into user.collection/packages/foo, tweak user.collection/packages/foo...) for images, tasks, etc... The main concept is: if it's found in user.collection, it is used, else if it is found in com.gumstix.collection it is used, else if it is in org.openembedded.snapshot it is used, else error it cant be found. What I haven't figured out yet is: 1. How to cause new kernel module load scripts to get generated into image. See tmp/rootfs/etc/modutils/*. How do these get generated? Thanks, John > -----Original Message----- > From: gumstix-users-bounces@... > [mailto:gumstix-users-bounces@...] On > Behalf Of Mathias Bage > Sent: Wednesday, May 21, 2008 8:43 AM > To: General mailing list for gumstix users. > Subject: Re: [Gumstix-users] Kernel Hacking > > > > On Tue, 20 May 2008, Sergiy Fefilatyev wrote: > > > for me rebuild command did not produce the right results > > > I had problems with kernel compiles too. > > After googling and trying some bitbake commands, I noticed > that you can't > (re)compile the kernel with 'bitbake -c rebuild gumstix-kernel' -- > 'rebuild' will download and unpack a fresh kernel source and > then copy the > file: > > > gumstix-oe/com.gumstix.collection/packages/linux/gumstix-kerne > > to the file (assuming a uclibc target system and linux kernel version > 2.6.21): > > > gumstix-oe/tmp/work/gumstix-custom-verdex-angstrom-linux-uclib cgnueabi/gumstix-kernel-2.6.21-r1/linux-2.6.21/.config > > > So, if you use 'bitbake gumstix-kernel -c rebuild' after a > linux kernel > menuconfig (using 'bitbake gumstix-kernel -c menuconfig'), > your kernel > .config file (path above) will have been overwritten by Gumstix Inc's > default file (the .../defconfig file (see 11 lines above)) > > To avoid this problem, I did the following; > > bitbake gumstix-kernel -c menuconfig > > bitbake gumstix-kernel -f -c compile > > bitbake gumstix-kernel > > bitbake -c rebuild task-base-gumstix > > bitbake -c rebuild gumstix-directfb-image > > (replace gumstix-directfb-image with your preferred image name) > The '-f' is used to force a '-c compile'. > > > > > On Tue, May 20, 2008 at 3:21 PM, Mark Barton > <mark@...> wrote: > > > >> Mike Caruso wrote: > >>> Hello list, > >>> I was wondering if anybody knew how to build a custom kernel for a > >>> Verdex running Open Embedded? I have a USB Ethernet > adapter I'd like > >>> to get working on my Verdex, it uses the RTL8150 driver. My first > >>> thought was to try and add it to gumstix-custom-verdex.conf, but > >>> wouldn't you need to enable it in the kernel config first > so that it > >>> knows to build that module? I found what appears to be the kernel > >>> config in: > [snip] > > /Mathias > > -------------------------------------------------------------- > ----------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > gumstix-users mailing list > gumstix-users@... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ gumstix-users mailing list gumstix-users@... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
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Re: Kernel Hacking
by Mike Caruso
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Mark,
THANKS! That was what I was looking for. To add on to those instructions, I had to add 'kernel-module-rtl8150' to the ethernet section of task-base-gumstix.bb and it all works :). Now, to find a way to get gphoto2 on there.... Mike On Tue, May 20, 2008 at 7:21 PM, Mark Barton <mark@...> wrote:
------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ gumstix-users mailing list gumstix-users@... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
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Re: Kernel Hacking
by Mike Caruso
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John,
> What I haven't figured out yet is: >1. How to cause new kernel module load scripts to get generated into >image. See tmp/rootfs/etc/modutils/*. How do these get generated? I don't know if this helps, but had to add the following to my 'gumstix-oe/com.gumstix.collection/packages/tasks/task-base-gumstix.bb' recipe for it to load the module into the image: RECOMMENDS_task-base-gumstix-ethernet = "\ kernel-module-smc91x \ kernel-module-smc911x \ kernel-module-rtl8150 \ " Note the addition of the rtl8150 kernel module line. This appears to add the appropriate packages and scripts into the 'task-base-gumstix-ethernet_1.0-r9_gumstix-custom-verdex.ipk' package which gets installed into the root file system. I think next time I'll try your method :^) Alternatively, does anybody know of a way of just replacing the kernel without replacing the whole file system? Thanks, Mike On Wed, May 21, 2008 at 1:58 PM, Pauley, John C <John.C.Pauley@...> wrote: I believe the problem of supplying your own kernel config has answered ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ gumstix-users mailing list gumstix-users@... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
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