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powerpc/mpic: Add "last-interrupt-source" property to override hardware
authorKyle Moffett <Kyle.D.Moffett@boeing.com>
Thu, 22 Dec 2011 10:19:13 +0000 (10:19 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 22 Feb 2012 23:50:00 +0000 (10:50 +1100)
The FreeScale PowerQUICC-III-compatible (mpc85xx/mpc86xx) MPICs do not
correctly report the number of hardware interrupt sources, so software
needs to override the detected value with "256".

To avoid needing to write custom board-specific code to detect that
scenario, allow it to be easily overridden in the device-tree.

Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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