linux-kernel - [tip:irq/core] dt-bindings/gic-v3: Add documentation for MBI support

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Date:   Sun, 13 May 2018 07:07:56 -0700
From:   tip-bot for Marc Zyngier <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     miquel.raynal@...tlin.com, hpa@...or.com, robh@...nel.org,
        mingo@...nel.org, marc.zyngier@....com, tglx@...utronix.de,
        srinivas.kandagatla@...aro.org, thomas.petazzoni@...tlin.com,
        linux-kernel@...r.kernel.org, ard.biesheuvel@...aro.org,
        jason@...edaemon.net
Subject: [tip:irq/core] dt-bindings/gic-v3: Add documentation for MBI
 support

Commit-ID:  53667c670fe00d63246fb3cfb4480bb1ba247bcc
Gitweb:     https://git.kernel.org/tip/53667c670fe00d63246fb3cfb4480bb1ba247bcc
Author:     Marc Zyngier <marc.zyngier@....com>
AuthorDate: Tue, 8 May 2018 13:14:38 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Sun, 13 May 2018 15:59:02 +0200

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

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

Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Rob Herring <robh@...nel.org>
Cc: Jason Cooper <jason@...edaemon.net>
Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Cc: Miquel Raynal <miquel.raynal@...tlin.com>
Link: https://lkml.kernel.org/r/20180508121438.11301-10-marc.zyngier@arm.com

---
 .../bindings/interrupt-controller/arm,gic-v3.txt        | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
index 0a57f2f4167d..3ea78c4ef887 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
@@ -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@...00000 {
 			compatible = "arm,gic-v3-its";
 			msi-controller;