ld: cannot open pad.o COMPILE Error --help

["Mukund JB." <mukundjb@esntechnologies.co.in>]

Dear all,
 
I am written a new keypad driver `keypad_drv.c' .I wanted this to be integrated to the kernel rather than a module.
 
So, I edited the Config.in file the driver/char adding
 
        bool `EP93xx Keypad support' CONFIG_GPIO_KEYPAD
 
I edited the Makefile file in driver/char adding
 
        Obj-$(CONFIG_GPIO_KEYPAD) +=keypad_drv.o
 
Is there any thing that I am missing just because, I am not able to compile and I am getting the following Error:
 
        arm-linux-ld: cannot open keypad_drv.o: No such file or directory
 
Can any one suggest me what is the problem?
 
 
Regards,
Mukund Jampala
 
 

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