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diff --git a/roms/skiboot/doc/device-tree/ibm,opal/flash.rst b/roms/skiboot/doc/device-tree/ibm,opal/flash.rst
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+.. _device-tree/ibm,opal/flash:
+
+ibm,opal/flash device tree entries
+==================================
+
+The flash@<n> nodes under ibm,opal describe flash devices that can be
+accessed through the OPAL_FLASH_{READ,ERASE,WRITE} interface.
+
+These interfaces take an 'id' parameter, which corresponds to the ibm,opal-id
+property of the node.
+
+The properties under a flash node are:
+
+- ``compatible = "ibm,opal-flash"``
+
+``ibm,opal-id = <id>``
+  provides the index used for the OPAL_FLASH_XXX calls to reference this
+  flash device
+
+``reg = <0 size>``
+  the offset and size of the flash device
+
+``ibm,flash-block-size``
+  the read/write/erase block size for the flash interface. Calls
+  to read/write/erase must be aligned to the block size.
+
+``#address-cells = <1>``, ``#size-cells = <1>``
+  flash devices are currently 32-bit addressable
+
+If valid partitions are found on the flash device, then ``partition@<offset>``
+sub-nodes are added to the flash node. These match the Linux binding for
+flash partitions; the reg parameter contains the offset and size of the
+partition.
+
+
+Example:
+
+.. code-block:: dts
+
+ flash@0 {
+   reg = <0x0 0x4000000>;
+   compatible = "ibm,opal-flash";
+   ibm,opal-id = <0x0>;
+   ibm,flash-block-size = <0x1000>;
+   #address-cells = <0x1>;
+   phandle = <0x100002bf>;
+   #size-cells = <0x1>;
+ };