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authorDarren Hart <dvhart@linux.intel.com>2011-02-14 14:52:47 -0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2011-02-15 19:23:59 +0000
commitf7cb8230700bdbbd570d69447cea35cda363208c (patch)
treee64cd4ecf33a8bc445a1f591c3ba5406f77bee6d /README.hardware
parente0f49d2ae40ee7c5e6a804264845b89595e1b06c (diff)
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README.hardware: update the beagleboard serial port documentation
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@linux.intel.com> CC: Gary Thomas <gary@mlbassoc.com>
Diffstat (limited to 'README.hardware')
-rw-r--r--README.hardware16
1 files changed, 12 insertions, 4 deletions
diff --git a/README.hardware b/README.hardware
index bc5b5b8afd..c0df01bc0d 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"