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From: a b <poseidon21@post.sk>
To: <linuxppc-embedded@ozlabs.org>
Subject: SMC as UART problem on mpc8xx
Date: 01 Feb 2007 17:10:31 +0100 (CET)
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Hi,
I have mpc8xx where I would like the following configuration:
 - SCC1 as system console (works fine) 
 - SMC1-2 as UART (doesn\'t work)

I use linux 2.6.16.20 with backward patch from linux-2.6.19.2 for SMCs. My only problem is 
that even I can see cpm_uart registered for IRQ 20 (for SMC1) I never get interrupt even
I do e.g. \"echo 123 > /dev/ttyCPM\". 

here is a short extract from /proc/interrupts:
 20:          0   CPM       Edge      cpm_uart  <--SMC1
 21:       7546   CPM       Edge      SPI
 46:         20   CPM       Edge      cpm_uart  <-- SCC1 (console)

here is a short extract from /proc/tty/driver/ttyCPM:
serinfo:1.0 driver revision:
0: uart:CPM UART mmio:0xFFF00A80 irq:20 tx:14 rx:0 RTS|CTS|DTR|DSR|CD
1: uart:CPM UART mmio:0xFFF00A90 irq:19 tx:0 rx:0 CTS|DSR|CD
2: uart:CPM UART mmio:0xFFF00A00 irq:46 tx:3038 rx:46 RTS|CTS|DTR|DSR|CD

Can anybody help me to get SMCs working?

thnx,
Ladislav.



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