>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 ?
Thanks
Vincent
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