2011-01-15 15:46:04     drivers/char/test/built-in.o: No such file: No such file or directory

2011-01-15 15:46:04     drivers/char/test/built-in.o: No such file: No such file or directory

Carl Berglund (SWEDEN)

Message: 97469   

Hi, im trying to add the simple-gpio.c driver to linux kernel and I follow the guide in   docs.blackfin.uclinux.org/doku.php?id=basic_driver_configure_and_build

But when i compile i get the error:

/opt/uClinux/bfin-uclinux/bin/../bfin-uclinux/bin/ld.real: drivers/char/test/built-in.o: No such file: No such file or directory

make[3]: *** [drivers/char/built-in.o] Error 1

make[2]: *** [drivers/char] Error 2

make[1]: *** [drivers] Error 2

make[1]: Leaving directory `blackfin-linux-dist/linux-2.6.x'

make: *** [linux] Error 1

What is built-in.o and how do i get it?

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2011-01-15 15:55:56     Re: drivers/char/test/built-in.o: No such file: No such file or directory

Mike Frysinger (UNITED STATES)

Message: 97470   

use the GPIO sysfs driver:

  docs.blackfin.uclinux.org/doku.php?id=linux-kernel:drivers:gpio-sysfs

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2011-01-16 09:23:28     Re: drivers/char/test/built-in.o: No such file: No such file or directory

Carl Berglund (SWEDEN)

Message: 97474   

Thanks, that works great.

But why doesn't the other driver work?

And what is the difference between devices in /dev and /sys?

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2011-01-16 12:22:09     Re: drivers/char/test/built-in.o: No such file: No such file or directory

Mike Frysinger (UNITED STATES)

Message: 97478   

there is probably a bug in the way you tried to integrate the code

/dev is a bunch of device nodes manually managed while /sys is a pseudo filesystem generated on the fly