1) Create Directory: /board/{VENDOR}/{BRDNAME}
2) Check similar driver? GPIO?
2a) For example, if we want to modify GPIO, create the C src file in /driver/gpio/{MARCH}_gpio.c
2b) In the /drivers/gpio/Makefile, add:
COBJS-$(CONFIG_{MARCH}_GPIO) += {BRDNAME}_gpio.o
2c) Create file: include/configs/{BRDNAME}.h
add #define CONFIG_{BRDNAME}_GPIO
3) CPU
3a) Create configs/{BRDNAME}_defconfig in the /configs directory
CONFIG_{ARCH}=y
CONFIG_TARGET_{BRDNAME}=y
3b) In arch/{ARCH}/Kconfig, add:
config TARGET_{BRDNAME}
bool "Support {BRDNAME}"
select CPU_{MARCH}
3c) In arch/{ARCH}/Kconfig, add:
source "board/{VENDOR}/{BRDNAME}/Kconfig"
4) Place relevant src files in
/board/{VENDOR}/{BRDNAME}
5) Add your Device in boards.cfg
6) Add Kconfig file:
if TARGET_{BRDNAME}
config SYS_BOARD
default "{BRDNAME}"
config SYS_VENDOR
default "{VENDOR}"
config SYS_SOC
default "{ARCH}"
config SYS_CONFIG_NAME
default "{BRDNAME}"
endif
