Create YAML config file for device tree generation.

This file will be read by the device tree generation
code to fill in some things that aren't strictly
hardware dependent so don't belong in the XML.

Change-Id: I8d863adfd04c13dee5e133f1aceed76d470c2fe1
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/workbook/devtree-config/config.yaml b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/workbook/devtree-config/config.yaml
new file mode 100644
index 0000000..c289bb2
--- /dev/null
+++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/workbook/devtree-config/config.yaml
@@ -0,0 +1,34 @@
+#Device tree include files, which can be
+#included in different parts of the tree.
+#Optional.
+includes:
+  pre-root-node:
+   - aspeed-g5.dtsi
+   - dt-bindings/gpio/aspeed-gpio.h
+  root-node:
+   - aspeed-bmc-opp-spi-flash-legacy.dtsi
+  post-root-node:
+  bmc-flash:
+   - aspeed-bmc-opp-flash-layout.dtsi
+
+#The BMC's memory base address and size.
+#Required.
+memory:
+  base: 0x80000000
+  size: 0x40000000
+
+#Values for the chosen node.
+#Required.
+chosen:
+  stdout-path: uart5
+  bootargs: console=ttyS4,115200 earlyprintk
+
+#Values for the aliases node.
+#Optional.
+aliases:
+  serial4: uart5
+
+#The number that should be added to the MRW's
+#I2C bus number to get the device tree's number.
+#Optional.
+i2c-bus-adjust: -1