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Commit 98cca250 authored by Kyle Moffett's avatar Kyle Moffett Committed by Benjamin Herrenschmidt
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fsl/mpic: Document and use the "big-endian" device-tree flag 



The MPIC code checks for a "big-endian" property and sets the flag
MPIC_BIG_ENDIAN if one is present, although prior to the "mpic->flags"
fixup that would never have worked anways.

Unfortunately, even now that it works properly, the Freescale mpic
device-node (the "PowerQUICC-III"-compatible one) does not specify it,
so all of the board ports need to manually pass it to mpic_alloc().

Document the flag and add it to the pq3 device tree.  Existing code will
still need to pass the MPIC_BIG_ENDIAN flag because their dtb may not
have this property, but new platforms shouldn't need to do so.

Signed-off-by: default avatarKyle Moffett <Kyle.D.Moffett@boeing.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 3a7a7176

Documentation/devicetree/bindings/powerpc/fsl/mpic.txt

+8 −1
Original line number Diff line number Diff line
@@ -57,6 +57,13 @@ PROPERTIES 
          that any initialization related to interrupt sources shall

          be limited to sources explicitly referenced in the device tree.



  - big-endian

      Usage: optional

      Value type: <empty>

          If present the MPIC will be assumed to be big-endian.  Some

          device-trees omit this property on MPIC nodes even when the MPIC is

          in fact big-endian, so certain boards override this property.



INTERRUPT SPECIFIER DEFINITION



  Interrupt specifiers consists of 4 cells encoded as

arch/powerpc/boot/dts/fsl/pq3-mpic.dtsi

+1 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ mpic: pic@40000 { 
	reg = <0x40000 0x40000>;

	compatible = "fsl,mpic";

	device_type = "open-pic";

	big-endian;

};



timer@41100 {