lkml.org 
[lkml]   [2018]   [May]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
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@arm.com>
AuthorDate: Tue, 8 May 2018 13:14:38 +0100
Committer: Thomas Gleixner <tglx@linutronix.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@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

---
.../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@2c200000 {
compatible = "arm,gic-v3-its";
msi-controller;
\
 
 \ /
  Last update: 2018-05-13 16:08    [W:0.142 / U:7.924 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site