TI Sitara SK Android Loadable Kernel Module (LKM)

I am in the process of creating a makefile to compile the LKM. 

Can someone tell me the path of the kernel source TI Sitara SK?

I have download the everything and the kitchen sink for rowboat.

Also below the makefile. Please let me know the value for $KDIR

Makefile

VERSION = 3
PATCHLEVEL = 2
SUBLEVEL = 0
EXTRAVERSION = 00763-g4071679
 
 
obj-m :=lcdc_load_device.o
lcdc_load_device-m += ../rowboat-android/kernel/arch/arm/plat-omap/omap_device.o
lcdc_load_device-m += ../rowboat-android/kernel/arch/arm/mach-omap2/omap_hwmod.o
 
KDIR := /home/userid/rowboat-android/kernel/

PWD := $(shell pwd)
 
default:
    $(MAKE) ARCH=arm CROSS_COMPILE=/home/userid/rowboat-android/prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi- -C $(KDIR) SUBDIRS=$(PWD) modules
 
clean:
    $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) clean

Thank you