25 lines
755 B
ReStructuredText
25 lines
755 B
ReStructuredText
.. _device-tree/ibm,opal/oppanel:
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Operator Panel (oppanel)
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========================
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.. code-block:: dts
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oppanel {
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compatible = "ibm,opal-oppanel";
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#lines = <0x2>;
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#length = <0x10>;
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};
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The Operator Panel is a device for displaying small amounts of textual
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data to an administrator. On IBM POWER8 systems with an FSP, this is a
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small 16x2 LCD panel that can be viewed either from the Web UI of the FSP
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(known as ASM) or by physically going to the machine and looking at the
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panel.
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The operator panel does not have to be present.
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If it is, there are OPAL calls to read and write to it.
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The device tree entry is so that the host OS knows the size of the panel
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and can pass buffers of the appropriate size to the OPAL calls.
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