[yocto] Porting of specific Kernel/Driver into yocto.
Om Prakash PAL
omprakash.pal at stericsson.com
Thu May 3 02:24:46 PDT 2012
Hi Bruce,
Thanks a lot for your help.
Now I am able to build the local kernel.
I have one doublt:
when I do
bitbake -c mencuconfig virtual/kernel
then from which location it will take the config file?.
and if I want to buiild my own specific defconfig file then How can do it?.
Best Regards,
Om Prakash Pal
________________________________________
From: Bruce Ashfield [bruce.ashfield at windriver.com]
Sent: Monday, April 30, 2012 7:42 PM
To: Om Prakash PAL
Cc: Bruce Ashfield; yocto at yoctoproject.org
Subject: Re: [yocto] Porting of specific Kernel/Driver into yocto.
On 12-04-30 6:34 AM, Om Prakash PAL wrote:
>> On 12-04-29 5:58 AM, Om Prakash PAL wrote:
>
> > Hi Bruce,
> >for porting of our local kernel,we have created an BSP layer and to change the the
> >kernel, we have created an linux-yocto_3.0.bbappend file inside
> >meta<BSP>/recipes-kernel/linux/
> >like this:-
>
> >FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
>
> > COMPATIBLE_MACHINE_<BSP_name> = "BSP_name"
>
> ># KMACHINE is the branch to build
> >KMACHINE_<BSP_name> = "local_branch"
>
> > SRCREV_machine_pn_linux-yocto_<BSP_name> ?= "XXXXXXXX" (here we have assign
> >top commit ID of our local kernel)
>
>
> ># KSRC_linux_yocto to point to your local clone as appropriate.
> >KSRC_linux_yocto ?= "/path/to/local/kernel"
>
> >SRC_URI =
> >"git://${KSRC_linux_yocto};protocol=file;nocheckout=1;branch=${KBRANCH};name=machine
> >\
> > file://defconfig"
>
>
> >KERNEL_REVISION_CHECKING=""
> >SRCREV="${AUTOREV}"
> >#BB_LOCALCOUNT_OVERRIDE = "1"
> >LOCALCOUNT = "0"
>
>
> >while building we are getting following Error:
>
> >NOTE: Executing RunQueue Tasks
> >NOTE: Running task 1341 of 1710 (ID: 513,
> >/home/apallan/yocto/poky-edison-6.0/meta/recipes-kernel/linux/linux-yocto_3.0.bb,
> >do_validate_branches)
> >NOTE: package
> >linux-yocto-3.0.4+git1+6b2c7d65b844e686eae7d5cccb9b638887afe28e-r2: task
> >do_validate_branches: Started
> >ERROR: Function 'do_validate_branches' failed (see
> >/home/apallan/yocto/hello_build/tmp/work/u8500-poky-linux-gnueabi/linux-yocto-3.0.4+git1+6b2c7d65b844e686eae7d5cccb9b638887afe28e-r2/temp/log.do_validate_branches.16792
> >for further information)
>
>
> >please tell me what we have done wrong?.
> >is there anything else we need to modify in .bbappend file or some other
> >variable?.
>
>> Which release are you using again ?
> I am using 6.0.0 Edision
>
>> The diagnostics out of validate branches are about to get better in master,
>> but they are coupled with some other tools changes that couldn't go
>> into yocto 1.2.
>
>> Is there anything extra in the log file, or just what you saw on the
>> build log ?.
> actually I have set YOCTO_KERNEL_EXTERNAL_BRANCH ="dev";(dev is my local brach)
> Now this Error has gone and now I am getting
>
> ERROR: Function 'do_patch' failed (see /home/apallan/yocto/hello_build/tmp/work/u8500-poky-linux-gnueabi/linux-yocto-3.0.4+git2+0a81a5eaa7a5c1216cbd087bec5ec7cd8a448383-r3/temp/log.do_patch.22008 for further information)
> ERROR: Logfile of failure stored in: /home/apallan/yocto/hello_build/tmp/work/u8500-poky-linux-gnueabi/linux-yocto-3.0.4+git2+0a81a5eaa7a5c1216cbd087bec5ec7cd8a448383-r3/temp/log.do_patch.22008
> Log data follows:
> | ERROR. meta data not found, check upstream repo for tags and branches
> | ERROR: Function 'do_patch' failed (see /home/apallan/yocto/hello_build/tmp/work/u8500-poky-linux-gnueabi/linux-yocto-3.0.4+git2+0a81a5eaa7a5c1216cbd087bec5ec7cd8a448383-r3/temp/log.do_patch.22008 for further information)
> NOTE: package linux-yocto-3.0.4+git2+0a81a5eaa7a5c1216cbd087bec5ec7cd8a448383-r3: task do_patch: Failed
> ERROR: Task 516 (/home/apallan/yocto/poky-edison-6.0/meta/recipes-kernel/linux/linux-yocto_3.0.bb, do_patch) failed with exit code '1'
> ERROR: '/home/apallan/yocto/poky-edison-6.0/meta/recipes-kernel/linux/linux-yocto_3.0.bb' failed
>
This is what I was saying a few weeks ago. If you aren't using
the linux-yocto kernel repository (and hence linux-yocto branches/meta
data) as your base, then building directly via the linux-yocto recipe
probably isn't what you want. It is a recipe that leverages the tools
and infrastructure on top of the linux-yocto repository.
That same infrastructure can build other repositories, but needs some
extra variables set. The meta-kernel-dev layer, in poky-extras has
examples of this for building korg (or any repo) with the tools.
What you re being told in this particular error is that you don't have
a meta branch in the tree, or not one that the tools can recognize.
You can prevent this by setting YOCTO_KERNEL_META_DATA="" in your
recipe (see the korg recipe as an example). (and FYI: this will no
longer be required in 1.3, but it is for any previous release.
>
>> Validate branches fails like this when you've provided a bad branch or
>> SRCREV (vs a SRCREV that is simply not the tip of the branch .. it fixes
>> hat scenario) and the fetcher or another git command aborts.
>
>> You've output some example text from the bbappend, but what were the real
>> values in your situation ? i.e. what are KMACHINE/KBRANCH set to ?.
>
> I have not set the value of KBRANCH?. what it should be ?.
It needs to be a valid branch in the repository. The 1.2 recipes
set it to be KMACHINE if it hasn't been explicitly set. But it
sounds like you are past this, and have set your branch to something
that actually exists in the tree.
Cheers,
Bruce
>
>> There are some flags you can set to exit the branch validation early, but
>> I don't think setting them is the right course of action yet, since the
>> error you are seeing is likely hiding some other mis configuration.
>
>> Cheers,
>
>> Bruce
>
> Best Regards,
> Om Prakash Pal
> ________________________________________
> From: Om Prakash PAL
> Sent: Sunday, April 29, 2012 3:28 PM
> To: Bruce Ashfield
> Cc: yocto at yoctoproject.org
> Subject: RE: [yocto] Porting of specific Kernel/Driver into yocto.
>
> Hi Bruce,
> for porting of our local kernel,we have created an BSP layer and to change the the kernel, we have created an linux-yocto_3.0.bbappend file inside meta<BSP>/recipes-kernel/linux/
> like this:-
>
> FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
>
> COMPATIBLE_MACHINE_<BSP_name> = "BSP_name"
>
> # KMACHINE is the branch to build
> KMACHINE_<BSP_name> = "local_branch"
>
> SRCREV_machine_pn_linux-yocto_<BSP_name> ?= "XXXXXXXX" (here we have assign top commit ID of our local kernel)
>
>
> # KSRC_linux_yocto to point to your local clone as appropriate.
> KSRC_linux_yocto ?= "/path/to/local/kernel"
>
> SRC_URI = "git://${KSRC_linux_yocto};protocol=file;nocheckout=1;branch=${KBRANCH};name=machine \
> file://defconfig"
>
>
> KERNEL_REVISION_CHECKING=""
> SRCREV="${AUTOREV}"
> #BB_LOCALCOUNT_OVERRIDE = "1"
> LOCALCOUNT = "0"
>
>
> while building we are getting following Error:
>
> NOTE: Executing RunQueue Tasks
> NOTE: Running task 1341 of 1710 (ID: 513, /home/apallan/yocto/poky-edison-6.0/meta/recipes-kernel/linux/linux-yocto_3.0.bb, do_validate_branches)
> NOTE: package linux-yocto-3.0.4+git1+6b2c7d65b844e686eae7d5cccb9b638887afe28e-r2: task do_validate_branches: Started
> ERROR: Function 'do_validate_branches' failed (see /home/apallan/yocto/hello_build/tmp/work/u8500-poky-linux-gnueabi/linux-yocto-3.0.4+git1+6b2c7d65b844e686eae7d5cccb9b638887afe28e-r2/temp/log.do_validate_branches.16792 for further information)
>
>
> please tell me what we have done wrong?.
> is there anything else we need to modify in .bbappend file or some other variable?.
>
> Best Regards,
> Om Prakash Pal
> ________________________________________
> From: Bruce Ashfield [bruce.ashfield at gmail.com]
> Sent: Monday, April 09, 2012 11:04 PM
> To: Om Prakash PAL
> Cc: yocto at yoctoproject.org
> Subject: Re: [yocto] Porting of specific Kernel/Driver into yocto.
>
> On Mon, Apr 9, 2012 at 12:31 PM, Om Prakash PAL
> <omprakash.pal at stericsson.com> wrote:
>> Hi Bruce,
>> Thanks for you help.
>> As you have mentioned, its working properly.
>> I want to know that is there any better way of doing same thing for my scenario ?:
>> here is my scenario:
>> We have development branch where we write/modify our kernel/driver code i.e. thats our local kernel repository(git rep)
>> and lots of driver/files being modified everyday-->so I have to take the same effect into yocto kernel also----> so except creating patches for all modified drivers and creating .bbappend files, is there any better way of doing same thing .
>
> Aha. Missed that.
>
> Just create a simple recipe that points at your git repository in the SRC_URI.
> If all the changes are in the tree, and you have a defconfig and you
> are building
> the master branch. Then pretty much everything you need can be specified in
> the SRC_URI .. and that's the entire recipe.
>
> If you look in oe-classic, meta-ti or any one of a number of other
> layers, you'll
> find recipes that do just that.
>
> The meta-kernel-dev (in the poky extras) layer has an example of using the
> kernel.org tree with the yocto kern tools, and once yocto 1.3 opens up for
> submissions, I have a set of changes prep'd that make it relatively simple to
> use the yocto kern tools against different types of repository.
>
> So the summary is: Depending on the type of tooling you need, and what baseline
> you need for your work .. there are a number of ways to do things.
>
>>
>> Is there anyway that instead of using yocto-kernel tree, can we use our local kernel-tree for building images?. (should I create separate BSP ?)
>
> You should definitely create a BSP, that way you can tune the system specific
> to your board,
>
> Cheers,
>
> Bruce
>
>>
>> Thanks in advance.
>> Best Regards,
>> Om Prakash Pal
>> ________________________________________
>> From: Bruce Ashfield [bruce.ashfield at windriver.com]
>> Sent: Monday, April 09, 2012 9:32 AM
>> To: Om Prakash PAL
>> Cc: yocto at yoctoproject.org
>> Subject: Re: [yocto] Porting of specific Kernel/Driver into yocto.
>>
>> On 12-04-08 10:04 AM, Om Prakash PAL wrote:
>>> Hi Bruce,
>>> Thanks for your reply.
>>> I am totally new to Yocto.
>>> I have gone through the section BSP/Linux kernel configuration and if I am not wrong then it explains how can we configure the kernel, not the how we can add/replace a component(driver etc).
>>> lets take the example of UART driver, I want to add my own UART driver code.
>>> Should I write a separate recipe file (.bb) for UART Driver?.
>>> if yes then I have to write the recipe files for all my drivers that will be very time consuming.
>>> Is there any other way that I can port all my desired drivers into Yocto kernel?.
>>
>> No recipes are required per-driver, unless you are building them all
>> as out of tree modules.
>>
>> The typical way this is done is to simply work in the extracted linux
>> src tree (build/tmp/work/<your board>/linux-yocto-<hashes>/linux), manually
>> patch, or copy your drivers into the tree. At this point, you'll port
>> the drivers, doing test builds (bitbake -f -c compile linux-yocto) to
>> ensure that your port is working. When you've completed the build phase,
>> boot tests would be in order. (Do not do a 'clean' or you'll lose in
>> progress changes).
>>
>> When you are happy with the changes, the directory where you were working
>> is with the kernel git repository. So you can simply commit your
>> changes, and generate patches.
>>
>> git format-patch -o<your directory> HEAD^ (or however many commits
>> you have)
>>
>> Take those patches, create a layer with a bbappend and add them like
>> any other patch to any package. They'll be applied to subsequent builds
>> of the kernel.
>>
>> I'm skipping a lot of detail there, but it is all found in the various
>> manuals, and I don't want to repeat it here.
>>
>> Cheers,
>>
>> Bruce
>>
>>> Please help me.
>>> Thanks a lot in advance.
>>>
>>> Best Regards,
>>> Om Prakash Pal
>>> ________________________________________
>>> From: Bruce Ashfield [bruce.ashfield at windriver.com]
>>> Sent: Wednesday, April 04, 2012 6:17 PM
>>> To: Om Prakash PAL
>>> Cc: yocto at yoctoproject.org
>>> Subject: Re: [yocto] Porting of specific Kernel/Driver into yocto.
>>>
>>> On 12-04-04 04:46 AM, Om Prakash PAL wrote:
>>>> Hi,
>>>> I want to build my local kernel/Driver code, not the default one.
>>>> please help how can i do it ?.
>>>> any wiki/docs on this?.
>>>
>>> The BSP developer guides show how to extend the yocto kernels, and
>>> also have sections on custom/different kernel versions. Have you
>>> seen that doc yet ? Or have you seen it, and have specific questions ?
>>>
>>> Bruce
>>>
>>>>
>>>> Best Regards,
>>>> Om Prakash Pal
>>>> _______________________________________________
>>>> yocto mailing list
>>>> yocto at yoctoproject.org
>>>> https://lists.yoctoproject.org/listinfo/yocto
>>>
>>
>> _______________________________________________
>> yocto mailing list
>> yocto at yoctoproject.org
>> https://lists.yoctoproject.org/listinfo/yocto
>
>
>
> --
> "Thou shalt not follow the NULL pointer, for chaos and madness await
> thee at its end"
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