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| author | Kyle Moffett <Kyle.D.Moffett@boeing.com> | 2011-12-22 10:19:13 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-02-23 10:50:00 +1100 |
| commit | c1b8d45db4dbc64cc6015f97922f767fdf782f64 (patch) | |
| tree | c23f986f6601b2f67645eca5b8744c8d753bc094 /Documentation | |
| parent | 5019609fce965dbdc66a7d947385fe92ca522231 (diff) | |
| download | op-kernel-dev-c1b8d45db4dbc64cc6015f97922f767fdf782f64.zip op-kernel-dev-c1b8d45db4dbc64cc6015f97922f767fdf782f64.tar.gz | |
powerpc/mpic: Add "last-interrupt-source" property to override hardware
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>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/powerpc/fsl/mpic.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt b/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt index b393ccf..dc57446 100644 --- a/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt +++ b/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt @@ -70,6 +70,13 @@ PROPERTIES If present the MPIC will be assumed to only be able to route non-IPI interrupts to a single CPU at a time (EG: Freescale MPIC). + - last-interrupt-source + Usage: optional + Value type: <u32> + Some MPICs do not correctly report the number of hardware sources + in the global feature registers. If specified, this field will + override the value read from MPIC_GREG_FEATURE_LAST_SRC. + INTERRUPT SPECIFIER DEFINITION Interrupt specifiers consists of 4 cells encoded as |
