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
index c289bb2..a0c0422 100644
--- 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
@@ -6,10 +6,7 @@
    - 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.
@@ -32,3 +29,13 @@
 #I2C bus number to get the device tree's number.
 #Optional.
 i2c-bus-adjust: -1
+
+#BMC flash specific fields that don't belong
+#in the MRW.  Keys and values here show up
+#as-is in the node structure that gets passed to
+#the node generator code.
+bmc-flash-config:
+  chip-select-0:
+     DTSI_INCLUDE: aspeed-bmc-opp-flash-layout.dtsi
+  chip-select-1:
+    label: alt