[yocto] Confused with adding drivers to kernel via bitbake -c menuconfig

Wed Feb 11 13:00:39 PST 2015

Hi,

On Mon, Feb 9, 2015 at 9:03 PM, Alvin D.M. DIZON
<adm.dizon at pciltd.com.sg> wrote:
> From my understanding bitbake -c cleansstate deletes sstate-cache and $(WORKDIR), so if I want to replace the previous kernel configuration with a new one, I should run cleansstate right?

Yes bitbake <packagename> -c cleansstate will delete package cache & WORKDIR .

After you create you layer, add your bbappend file and add config in
defconfig.cfg simply bitbake <packagename> and it will detect changes
and process all tasks required by the package.

You can validate in your WORKDIR to validate the change

hmm I just notice that adding CONFIG_BT=m, when it was =y, in
defconfig.cfg didn't change it even tried cleansstate. But it worked
if I copy the original .config to my bbappend and change it inside...

I'm with yocto 1.7.1

NATIVELSBSTRING   = "Ubuntu-14.04"
TARGET_SYS        = "arm-poky-linux-gnueabi"
MACHINE           = "wandboard-quad"
DISTRO            = "poky"
DISTRO_VERSION    = "1.7.1"

 -KA

> ________________________________________
> From: Kevyn-Alexandre Paré [kapare at rogue-research.com]
> Sent: Saturday, February 07, 2015 3:21 AM
> To: Alvin D.M. DIZON
> Cc: yocto at yoctoproject.org
> Subject: Re: [yocto] Confused with adding drivers to kernel via bitbake -c menuconfig
>
> Alvin,,
>
> On Thu, Feb 5, 2015 at 8:35 PM, Alvin D.M. DIZON
> <adm.dizon at pciltd.com.sg> wrote:
>> Hello Kevyn,
>>
>> Thanks for your help. Do I still have to run bitbake -c cleansstate after creating the configuration fragment? Or do I go straight to bitbake linux-imx or bitbake fsl-image-x11?
>
> Look into ${WORKDIR}/temp for what's happening
> http://www.yoctoproject.org/docs/current/ref-manual/ref-manual.html#var-WORKDIR
> http://www.yoctoproject.org/docs/current/ref-manual/ref-manual.html#usingpoky-debugging-taskfailures
>
> It depends what you want to do.
>
> -KA
>
> On Thu, Feb 5, 2015 at 8:35 PM, Alvin D.M. DIZON
> <adm.dizon at pciltd.com.sg> wrote:
>> Hello Kevyn,
>>
>> Thanks for your help. Do I still have to run bitbake -c cleansstate after creating the configuration fragment? Or do I go straight to bitbake linux-imx or bitbake fsl-image-x11?
>>
>> Thanks
>> ________________________________________
>> From: Kevyn-Alexandre Paré [kapare at rogue-research.com]
>> Sent: Friday, February 06, 2015 12:58 AM
>> To: Alvin D.M. DIZON
>> Subject: Re: [yocto] Confused with adding drivers to kernel via bitbake -c menuconfig
>>
>> Hi Alvin,
>>
>> On Thu, Feb 5, 2015 at 12:43 AM, Alvin D.M. DIZON
>> <adm.dizon at pciltd.com.sg> wrote:
>>> Hello,
>>>
>>> I would like to the generic USB bluetooth driver "btusb" to my i.MX6Q SABRE SD, so that my USB Bluetooth dongle(Cambridge Silicon Radio). Upon reading https://community.freescale.com/docs/DOC-100847 I enabled the Bluetooth subsystem support, RFCOMM, BNEP, and HIDP, as well as the HCI USB driver. I saved the .config file and copied it to the directory where my Linux recipe is (linux-imx_3.10.17.bb). I then renamed my .config file into defconfig, made a new folder called "files" and placed the defconfig in it. I also made a .bbappend file that contained
>>
>> I personally prefer this approach:
>> http://www.yoctoproject.org/docs/1.6.1/kernel-dev/kernel-dev.html#changing-the-configuration
>> second part with the .cfg
>>
>> Doing this you can then validate it:
>> bitbake linux-imx -c configure -f
>>
>> cat tmp/work/<PATH>/linux-imx/<VERSION>/build/.config | grep CONFIG_BT
>>
>>>
>>> FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
>>> SRC_URI += "file://defconfig"
>>>
>>> I then ran "bitbake -c cleansstate linux-imx", after that I ran "bitbake fsl-image-x11". I flashed the resulting .sdcard file to an SD card, booted up my board, but found no trace of btusb. I tried doing "bitbake -f -c compile linux-imx" and then "bitbake -f -c deploy linux-imx", and copied the resulting uImage to my SD card's /media/Boot folder, but still no trace of btusb. I checked the tar archive for the kernel modules found in the /tmp/deploy/images/imx6qsabresd folder, and found two files called modules.order and modules.builtin, the btusb driver is listed in the modules.builtin file, but not mentioned in the modules.order file, I have also tried compiling the driver as module, and then ran the same commands as listed in the said link, but could not find the module. What am I doing wrong here? Any help will be will be appreciated, since I am new to Linux and the Yocto Project.
>>>
>>
>> Before putting it on your SD you could validate that btusb is in
>> tmp/work/<PATH>/linux-imx/<VERSION>/image
>>
>> Or
>>
>> grep btusb tmp/work/<PATH>/linux-imx/<VERSION>/temp/*
>>
>> Hope it could help,
>>
>> -KA
>>
>>> Thanks,
>>> Alvin
>>> [PCI]
>>>
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