[poky] [PATCH] README.hardware: update the beagleboard serial port documentation
Darren Hart
dvhart at linux.intel.com
Mon Feb 14 14:59:22 PST 2011
From: Darren Hart <dvhart at linux.intel.com>
Pull URL: git://git.pokylinux.org/poky-contrib.git
Branch: dvhart/beagle
Browse: http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=dvhart/beagle
Thanks,
Darren Hart <dvhart at linux.intel.com>
Update the README.hardware beagleboard description to account for the use
of the OMAP_SERIAL in recent kernel recipes. Add a note documenting how to
use the old 8250 based serial devices for older kernels.
Correct a type.
Correct the boot script name from user.scr to boot.scr.
Signed-off-by: Darren Hart <dvhart at linux.intel.com>
CC: Gary Thomas <gary at mlbassoc.com>
---
README.hardware | 16 ++++++++++++----
1 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/README.hardware b/README.hardware
index bc5b5b8..c0df01b 100644
--- a/README.hardware
+++ b/README.hardware
@@ -519,7 +519,7 @@ TODO: need someone with a Beagleboard C4 to verify these instructions.
Due to the lack of NAND on the xM, the install and boot process varies a bit
between boards. The C4 can run the x-loader and u-boot binaries from NAND or
the SD, while the xM can only run them from the SD. The following instructions
-apply to both the C4 and the xM, but te C4 can skip step 2 (as noted below),
+apply to both the C4 and the xM, but the C4 can skip step 2 (as noted below),
and may require modification of the NAND environment.
1. Partition and format an SD card:
@@ -564,11 +564,19 @@ and may require modification of the NAND environment.
# (cat << EOF
setenv bootcmd 'mmc init; fatload mmc 0:1 0x80300000 uImage; bootm 0x80300000'
- setenv bootargs 'console=tty0 console=ttyS2,115200n8 root=/dev/mmcblk0p2 rootwait rootfstype=ext3 ro'
+ setenv bootargs 'console=tty0 console=ttyO2,115200n8 root=/dev/mmcblk0p2 rootwait rootfstype=ext3 ro'
boot
EOF
) > serial-boot.cmd
- # mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "Poky Minimal" -d ./serial-boot.cmd ./user.scr
- # cp user.scr /media/boot
+ # mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "Poky Minimal" -d ./serial-boot.cmd ./boot.scr
+ # cp boot.scr /media/boot
6. Unmount the SD partitions and boot the Beagleboard
+
+Note: As of the 2.6.37 linux-yocto kernel recipe, the Beagleboard uses the
+ OMAP_SERIAL device (ttyO2). If you are using an older kernel, such as the
+ 2.6.35 linux-yocto-stable, be sure replace ttyO2 with ttyS2 above. You
+ should also override the machine SERIAL_CONSOLE in your local.conf in
+ order to setup the getty on the serial line:
+
+ SERIAL_CONSOLE_beagleboard = "115200 ttyS2"
--
1.7.0.4
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