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Document the reserved status
We use this on Bare metal Power 8/9 systems to mark devices that are used by the OPAL firmware rather than being available to the operating system. Signed-off-by: Oliver O'Halloran <[email protected]>
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source/devicetree-basics.rst

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@@ -573,6 +573,10 @@ Description:
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Refer to the device binding for details on what disabled means
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for a given device.
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-------------- --------------------------------------------------------------
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``"reserved"`` Indicates that the device is operational, but should not be
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used. Typically this is used for devices that are controlled
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by another software component, such as platform firmware.
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-------------- --------------------------------------------------------------
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``"fail"`` Indicates that the device is not operational. A serious error
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was detected in the device, and it is unlikely to become
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operational without repair.

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