Add openbmc-conversion.md to document switching from AMI
Change-Id: I40777dfcdb770809cf1032ce6081771d21857cd2
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/openbmc-conversion.md b/openbmc-conversion.md
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+# Converting to OpenBMC from AMI firmware #
+
+Often a number of steps are required to convert from the AMI firmware to
+OpenBMC. These steps are documented for various machines below.
+
+## Palmetto ##
+
+1. Upgrade the firmware flash chip to 256Mb (32MB) part (MX25L25635E or equivalent)
+2. [Build](cheatsheet.md#building-for-palmetto) and flash the `image-bmc`
+ output to the 256Mb flash chip
+3. Replace existing flash chip on the motherboard (cradle closest to the battery)
+4. Manufacture a cable to connect to the COM2 header for the BMC console. COM2
+ is wired for a DB-9-style pin-out.
+5. Reconfigure both `BMC_DEBUG1` (TX) and `BMC_DEBUG2` (RX) jumpers to short
+ pins 2-3.
+6. Boot OpenBMC on your Palmetto. The console runs at 115200baud.