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Diffstat (limited to 'roms/skiboot/doc/device-tree/ibm,opal/oppanel.rst')
| -rw-r--r-- | roms/skiboot/doc/device-tree/ibm,opal/oppanel.rst | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/roms/skiboot/doc/device-tree/ibm,opal/oppanel.rst b/roms/skiboot/doc/device-tree/ibm,opal/oppanel.rst new file mode 100644 index 000000000..c13949f82 --- /dev/null +++ b/roms/skiboot/doc/device-tree/ibm,opal/oppanel.rst @@ -0,0 +1,25 @@ +.. _device-tree/ibm,opal/oppanel: + +Operator Panel (oppanel) +======================== + +.. code-block:: dts + + oppanel { + compatible = "ibm,opal-oppanel"; + #lines = <0x2>; + #length = <0x10>; + }; + +The Operator Panel is a device for displaying small amounts of textual +data to an administrator. On IBM POWER8 systems with an FSP, this is a +small 16x2 LCD panel that can be viewed either from the Web UI of the FSP +(known as ASM) or by physically going to the machine and looking at the +panel. + +The operator panel does not have to be present. + +If it is, there are OPAL calls to read and write to it. + +The device tree entry is so that the host OS knows the size of the panel +and can pass buffers of the appropriate size to the OPAL calls. |