System Firmware
===============

The 'firmware' node under 'ibm,opal' lists system and OPAL firmware version.

.. code-block:: dts

  firmware {
	symbol-map = <0x0 0x300ac650 0x0 0x1b3f5>;
	compatible = "ibm,opal-firmware";
	ml-version = [4d 4c 20 46 57 37 37 30 2e 32 30 20 46 57 37 37 30 2e 32 30 20 46 57 37 37 30 2e 32 30];
	mi-version = <0x4d49205a 0x4c373730 0x5f303735 0x205a4c37 0x37305f30 0x3735205a 0x4c373730 0x5f303735>;
	version = "skiboot-5.0-rc2";
	phandle = <0x8e>;
	linux,phandle = <0x8e>;
  };

``compatible``
  property describes OPAL compatibility.

``symbol-map``
  property describes OPAL symbol start address and size.

``version``
  property describes OPAL version. Replaces 'git-id', so may
  not be present. On POWER9 and above, it is always present.

``mi-version``
  property describes Microcode Image. Only on IBM FSP systems.
  Will (likely) not be present on POWER9 systems.

``ml-version``
  property describes Microcode Level. Only on IBM FSP systems.
  Will (likely) not be present on POWER9 systems.

MI/ML format
------------
::

   <ML/MI> <T side version> <P side version> <boot side version>
