SOC_ROOT directory is not working if we mention it on application CMakeLists.txt

[aravinth-kalai]

Hello everyone!

I'm using zephyr 3.3.0 and micro controller as LPC55S16JBD64 , but in zephyr 3.3.0 there is no support for LPC55S16JBD64 (64 pin ) It's only having LPC55S16JBD100( 100 pin ) support, so I just edited the following soc folder files and now it's successfully built

Kconfig.soc
Kconfig.defconfig.lpc55S16
soc.c 

Now the issue is I'm trying to keep the soc folder and files in my application folder and I changed the SOC_ROOT directory to my local application directory using main CMakeLists.txt , but if I build it it's still considering the zephyr stack's soc folder instead of my application directory soc folder , I verified this by reverting the changes in zephyr soc directory and keeping the changes in my application directory's soc, am I missing anything in my CMakeLists.txt

rough application folder structure:

main.c
CMakeLists.txt
soc\arm\nxp_lpc\lpc55xxx\CMakeLists.txt -> This soc folder is not considering for build
soc\arm\nxp_lpc\lpc55xxx\Kconfig.defconfig.lpc55S16
soc\arm\nxp_lpc\lpc55xxx\Kconfig.defconfig.series
soc\arm\nxp_lpc\lpc55xxx\Kconfig.series
soc\arm\nxp_lpc\lpc55xxx\Kconfig.soc
soc\arm\nxp_lpc\lpc55xxx\linker.ld
soc\arm\nxp_lpc\lpc55xxx\pinctrl_soc.h
soc\arm\nxp_lpc\lpc55xxx\soc.c
soc\arm\nxp_lpc\lpc55xxx\soc.h
soc\arm\nxp_lpc\CMakeLists.txt
soc\arm\CMakeLists.txt
soc\Kconfig

zephyr 3.3.0 folder structure

soc\arm\nxp_lpc\lpc55xxx\CMakeLists.txt -> This soc folder is consider for build

main CMakeLists.txt

set( SOC_ROOT   ${CMAKE_CURRENT_LIST_DIR} )

Please help me to fix this issue as soon as possible.

Thanks in advance !

[nordicjm]

main CMakeLists.txt

Doesn't really show enough

[aravinth-kalai]

Hi @nordicjm ,

To change the soc directory we need to mention the below line

set( SOC_ROOT ${CMAKE_CURRENT_LIST_DIR} ) in a main CMakeLists.txt list right?

Unfortunately I'm unable to share full CMakeLists.txt or If possible if you have any links related to this topic please share

Thank you !

[DerekSnell]

Hi @aravinth-kalai ,
When you set SOC_ROOT in your CMakeLists.txt, is that done before pulling in the Zephyr boilerplate with find_package(Zephyr ...)?

[aravinth-kalai]

Hi @DerekSnell ,

Yes SOC_ROOT is mentioned before

find_package( Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE} ) this line 

[DerekSnell]

Hi @aravinth-kalai ,
Is the issue a problem with missing Kconfig definitions? Did you update all the paths sourced in the Kconfig files, to point to your app's SOC_ROOT folder? For example, lpc55xxx/Kconfig.defconfig.series sources soc/arm/nxp_lpc/lpc55xxx/Kconfig.defconfig.lp*, which I believe points to the SOC folder in the Zephyr repo.

A couple years ago I used my own SOC_ROOT folder for an SOC I added. I struggled getting all my Kconfig files sourced. I finally resolved it by putting intentional errors in my Kconfig files, and found some were not sourced. Then I hunted down how each was getting source until I confirmed all of them were included in the build.

Let us know what you find.