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dt-bindings/gic-v3: Add documentation for MBI support

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Add the required properties to support the MBI feature on GICv3.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lkml.kernel.org/r/20180508121438.11301-10-marc.zyngier@arm.com
This commit is contained in:
Marc Zyngier 2018-05-08 13:14:38 +01:00 committed by Thomas Gleixner
parent 3898535149
commit 53667c670f
1 changed files with 17 additions and 0 deletions
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17
Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
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@ -57,6 +57,20 @@ Optional
occupied by the redistributors. Required if more than one such
region is present.
- msi-controller: Boolean property. Identifies the node as an MSI
controller. Only present if the Message Based Interrupt
functionnality is being exposed by the HW, and the mbi-ranges
property present.
- mbi-ranges: A list of pairs <intid span>, where "intid" is the first
SPI of a range that can be used an MBI, and "span" the size of that
range. Multiple ranges can be provided. Requires "msi-controller" to
be set.
- mbi-alias: Address property. Base address of an alias of the GICD
region containing only the {SET,CLR}SPI registers to be used if
isolation is required, and if supported by the HW.
Sub-nodes:
PPI affinity can be expressed as a single "ppi-partitions" node,
@ -99,6 +113,9 @@ Examples:
<0x0 0x2c020000 0 0x2000>; // GICV
interrupts = <1 9 4>;
msi-controller;
mbi-ranges = <256 128>;
gic-its@2c200000 {
compatible = "arm,gic-v3-its";
msi-controller;