IOMUX: Add console multiplexing support.
Modifications to support console multiplexing. This is controlled using
CONFIG_SYS_CONSOLE_MUX in the board configuration file.
This allows a user to specify multiple console devices in the environment
with a command like this: setenv stdin serial,nc. As a result, the user can
enter text on both the serial and netconsole interfaces.
All devices - stdin, stdout and stderr - can be set in this manner.
1) common/iomux.c and include/iomux.h contain the environment setting
implementation.
2) doc/README.iomux contains a somewhat more detailed description.
3) The implementation in (1) is called from common/cmd_nvedit.c to
handle setenv and from common/console.c to handle initialization of
input/output devices at boot time.
4) common/console.c also contains the code needed to poll multiple console
devices for input and send output to all devices registered for output.
5) include/common.h includes iomux.h and common/Makefile generates iomux.o
when CONFIG_SYS_CONSOLE_MUX is set.
Signed-off-by: Gary Jennejohn <garyj@denx.de>
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index d280cb0..85025da 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -213,6 +213,11 @@
return 1;
}
+#ifdef CONFIG_CONSOLE_MUX
+ i = iomux_doenv(console, argv[2]);
+ if (i)
+ return i;
+#else
/* Try assigning specified device */
if (console_assign (console, argv[2]) < 0)
return 1;
@@ -221,6 +226,7 @@
if (serial_assign (argv[2]) < 0)
return 1;
#endif
+#endif /* CONFIG_CONSOLE_MUX */
}
/*