using SCC4 on MPC8272ADS

Landau, Bracha BLandau at
Wed Sep 21 20:21:03 EST 2005

I am using the MPC8272ADS with kernel 2.6.10. The kernel is configured to support 4 CPM SCCs, of which 1 and 4 are connected on the board.
I created device files as follows:

mknod /dev/ttyCPM0 c 204 46
mknod /dev/ttyCPM1 c 204 47
mknod /dev/ttyCPM2 c 204 48
mknod /dev/ttyCPM3 c 204 49

If I boot the kernel using console=ttyCPM3 I see that it uses SCC4. But when I boot with console=ttyCPM0 and write to the second port using a command like "echo hello > /dev/ttyCPM3" I don't see that anything is being outputted to the second console.

What am I doing wrong?
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