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Add support for CONFIG_SERIAL_MULTI on MPC5xxx

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Patch by Martin Krause, 8 Jun 2006

This patch supports two serial consoles on boards with
a MPC5xxx CPU. The console can be switched at runtime
by setting stdin, stdout and stderr to the desired serial
interface (serial0 or serial1). The PSCs to be used as
console port are definded by CONFIG_PSC_CONSOLE
and CONFIG_PSC_CONSOLE2.
See README.serial_multi for details.
This commit is contained in:
Wolfgang Denk
2006-06-16 17:04:45 +02:00
parent 30a43cc2ae
commit c12cffc543
5 changed files with 211 additions and 13 deletions
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26
doc/README.serial_multi
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@@ -52,3 +52,29 @@ PPC4XX Specific
setenv stdout serial0
setenv stderr serial0
setenv stdin serial0
MPC5xxx Specific
================
Up to two PSCs can be used as console.
Support for hardware handshake has not been implemented yet.
*) The first (default) console port is defined by:
#define CONFIG_PSC_CONSOLE <PSC number>
*) The second (alternative) console port is defined by:
#define CONFIG_PSC_CONSOLE2 <PSC number>
*) Commands to switch to the second console:
setenv stdout serial1
setenv stderr serial1
setenv stdin serial1
*) Commands to switch to the first console:
setenv stdout serial0
setenv stderr serial0
setenv stdin serial0
*) If a file descriptor is set to "serial" then the
current serial device will be used.