[yocto] defconfig file (or fragment files) not used

[Prakash Ks]

Hi Vincent,

Its better to create patch and apply from platform specific kernel recipes.

if you need more info let me know.

Thanks!
Prakash

On Thu, Mar 29, 2018 at 1:55 PM, Khem Raj <raj.khem at gmail.com> wrote:

>
>
> On 3/28/18 11:00 PM, Vincent Daanen wrote:
>
>> On 3/28/18 9:27 AM, Vincent Daanen wrote:
>>>
>>>> Hi,
>>>>
>>>> I want to add CAN driver support to the kernel. Here is the procedure
>>>> I
>>>> followed:
>>>>
>>>>   1. Generate a .config file
>>>>   2. Copy it to meta-myWork/recipes-kernel/linux/files/defconfig
>>>>   3. Update it: set at the end the config to enable CAN as follows
>>>>
>>>> # CAN Bus
>>>>
>>>> CONFIG_NET=y
>>>>
>>>> CONFIG_CAN=y
>>>>
>>>> CONFIG_CAN_RAW=y
>>>>
>>>> CONFIG_CAN_BCM=y
>>>>
>>>> CONFIG_CAN_GW=y
>>>>
>>>> #
>>>>
>>>> # CAN Device Drivers
>>>>
>>>> #
>>>>
>>>> CONFIG_CAN_VCAN=y
>>>>
>>>> # CONFIG_CAN_SLCAN is not set
>>>>
>>>> CONFIG_CAN_DEV=y
>>>>
>>>> # CONFIG_CAN_CALC_BITTIMING is not set
>>>>
>>>> # CONFIG_CAN_LEDS is not set
>>>>
>>>> # CONFIG_CAN_SJA1000 is not set
>>>>
>>>>   4. Update the linux-yocto_%.bbappend file as follows
>>>>
>>>> SUMMARY = "Recipe to configure kernel as required"
>>>>
>>>> LICENSE = "CLOSED"
>>>>
>>>> inherit kernel-yocto
>>>>
>>>> FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
>>>>
>>>> SRC_URI += file://defconfig
>>>>
>>>>   5. Request rebuilt:
>>>>
>>>> bitbake linux-yocto-rt -c cleansstate
>>>>
>>>> bitbake -k linux-yocto-rt
>>>>
>>>> Once the image started (with qemu), I check if the CAN is enabled
>>>> (using zcat /proc/config.gz | grep CAN) and I always get “CAN not set”
>>>>
>>>> I also tried using fragment and I got the same result ☹
>>>>
>>>> According the user manual, it seems to me I’m doing the right think!
>>>>
>>>> Does someone know why my defconfig file is not taken into account ?
>>>>
>>>>
>>> If you are using linux-yocto for your kernel provider then I wouldr
>>> recommend that you look into developer manual.
>>>
>>> you should look into using config fragments to modify the needed
>>> options e.g. see
>>> https://www.yoctoproject.org/docs/latest/kernel-dev/kernel-dev.html#cha
>>> nging-the-configuration
>>>
>>
>> I don't understand what you mean. That's what I'm doing. I followed the
>> procedure described in the link you provide... Can u explain ?
>>
>>
> Create a file for config fragment say can.cfg and put all options you want
> to change in that file and then add that to SRC_URI
> you dont need to create full defconfig.
>
>
> Thanks
>>
>> Vincent
>>
>> --
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-- 
Thanks and Regards,
Prakash K S
+91 9620140303
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