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#changing-the-configuration
Thanks
Vincent
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