65cc0e2a65
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
The support for multiple serial interfaces as implemented is mainly
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intended to allow for modem dial-in / dial-out while still being able
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to use a serial console on a (different) serial port.
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MPC8XX Specific
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===============
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At the moment, the ports must be split on a SMC and a SCC port on a
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8xx processor; other configurations are not (yet) supported.
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Support for hardware handshake has not been implemented yet (but is
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in the works).
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*) The default console depends on the keys pressed:
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- SMC if keys not pressed (modem not enabled)
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- SCC if keys pressed (modem enabled)
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*) The console can be switched to SCC by any of the following commands:
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setenv stdout serial_scc
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setenv stdin serial_scc
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setenv stderr serial_scc
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*) The console can be switched to SMC by any of the following commands:
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setenv stdout serial_smc
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setenv stdin serial_smc
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setenv stderr serial_smc
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*) If a file descriptor is set to "serial" then the current serial device
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will be used which, in turn, can be switched by above commands.
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*) The baudrate is the same for all serial devices. But it can be switched
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just after switching the console:
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setenv sout serial_scc; setenv baudrate 38400
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After that press 'enter' at the SCC console. Note that baudrates <38400
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are not allowed on LWMON with watchdog enabled (see CFG_SYS_BAUDRATE_TABLE in
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include/configs/lwmon.h).
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PPC4XX Specific
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===============
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*) The default console is UART0
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*) The console can be switched to UART1 by any of the following commands:
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setenv stdout serial1
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setenv stderr serial1
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setenv stdin serial1
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*) The console can be switched to UART0 by any of the following commands:
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setenv stdout serial0
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setenv stderr serial0
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setenv stdin serial0
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