topic Custom driver not building with the package in i.MX Processors

Custom driver not building with the package

chandraevolute — Mon, 25 Jul 2016 09:00:33 GMT

I am writing my own driver for switches for IMX6ulEVK. I followed the below steps while writing the driver

1. Create a directory like my_drvr inside drivers(which is in the Linux source code) for your driver and put your driver (my_driver.c) file inside this directory. It will looks like /linux_source_code/drivers/my_drvr/my_driver.c
2. Create one Makefile inside your driver directory (using vi any editor) and inside this put obj-$(CONFIG_MY_DRIVER) += my_driver.o and save this file. This will appears like /linux_source_code/drivers/my_drvr/Makefile
3. Create one Kconfig file inside your driver directory (using vi any editor) and inside this put
4. config MY_DRIVER
5. tristate "my driver" //gives your driver description like vendor name etc.
6. depends on ARM
7. default y if ARM
8. help

my driver module.

9. Save this file, this will appears like /linux_source_code/drivers/my_drvr/Kconfig
10. Add both Makefile and Kconfig file in the Linux source drivers Makefile and Kconfig file which are at /linux_source_code/drivers/Makefile and /linux_source_code/drivers/Kconfig
11. In the Makefile add below in last line

obj-y += my_drvr/

obj-$(CONFIG_MY_DRIVER) += my_drvr/

12. In Kconfig file add below in last line

source "drivers/my_drvr/Kconfig"

13. Finally have to add Kconfig file into architecture specific config file which will be at kernel_source/arch/arm/configs/--defconfig in this add below line in the last

CONFIG_MY_DRIVER=y

After compiling the kernel using bitbake linux-imx i am able to see my driver gopt compiled and .ko file is generated. But it is not included in the sdcard package. Is there anything I need to do additionally other than the above steps. I am using bitbake core-image-base for 3.14.38 bsp version

Re: Custom driver not building with the package

qinghuazhu — Mon, 25 Jul 2016 09:41:09 GMT

I'd like to share my rebuild script here

#!/bin/sh
rm tmp/stamps/imx6sxsabresd-poky-linux-gnueabi/linux-imx/3.14.28-r0.do_compile.*
bitbake linux-imx -c compile
if [ $? -ne 0 ];then
exit
fi
rm sstate-cache/ab/sstate:linux-imx:imx6sxsabresd-poky-linux-gnueabi:3.14.28:r0:imx6sxsabresd:3:abcaddfad744af88c57ba3e6769b28dc_deploy.tgz
rm tmp/stamps/imx6sxsabresd-poky-linux-gnueabi/linux-imx/3.14.28-r0.do_deploy.abcaddfad744af88c57ba3e6769b28dc
rm tmp/stamps/imx6sxsabresd-poky-linux-gnueabi/linux-imx/3.14.28-r0.do_deploy_setscene.abcaddfad744af88c57ba3e6769b28dc
bitbake linux-imx -c deploy
if [ $? -ne 0 ];then
exit
fi
rm tmp/stamps/imx6sxsabresd-poky-linux-gnueabi/core-image-minimal/1.0-r0.do_rootfs.*
bitbake core-image-minimal

and I don't like "bitbake xxxxx -f"

Re: Custom driver not building with the package

chandraevolute — Mon, 25 Jul 2016 10:48:50 GMT

thank you very much for the script.

will the above script will make sure that my custom driver and added with final image

Re: Custom driver not building with the package

SergioSolis — Fri, 19 Aug 2016 17:15:45 GMT

Hello Chandra, did you try the script from Qinghua?

Re: Custom driver not building with the package

chandraevolute — Sat, 20 Aug 2016 05:21:46 GMT

yes tried and it is working with minor changes