I wanna add my test device driver,
So make yu/ directory in driver/,
device driver source file is xxx.c(assume only one file)

Then edit Kconfig and Makefile...

===Kconfig in yu directory===

menu "Device Driver YU support"
config YU
tristate "YU TEST device driver"
---help---
YU,GANBARE~~~~~~
endmenu

===Makefile in yu directory===

obj-$(CONFIG_YU) += xxx.o

===Kconfig in driver directory===

source "drivers/yu/Kconfig"

===Makefile in driver directory===

obj-$(CONFIG_YU) += yu/


Doing so , but i cannot see this new item
by using "make menuconfig".
Could someone tell me how to sovle it?
Many thanks!