linux-kernel - [RFC PATCH 1/3]Binding: Add a new property string in ITS node to control the two-level route function

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Date:   Thu, 1 Dec 2016 15:45:58 +0800
From:   Majun <majun258@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <marc.zyngier@....com>,
        <linux-acpi@...r.kernel.org>, <robert.moore@...el.com>,
        <lenb@...nel.org>, <lv.zheng@...el.com>,
        <rafael.j.wysocki@...el.com>, <devel@...ica.org>,
        <mark.rutland@....com>, <robh+dt@...nel.org>,
        <jason@...edaemon.net>
CC:     <dingtianhong@...wei.com>, <guohanjun@...wei.com>,
        <majun258@...wei.com>
Subject: [RFC PATCH 1/3]Binding: Add a new property string in ITS node to control the two-level route function

From: MaJun <majun258@...wei.com>

Add the two-level-route property in ITS node.
When this property string defined, two-level route(indirect) function
will be enabled in ITS driver, otherwise disable it.

Signed-off-by: MaJun <majun258@...wei.com>
---
 Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
index 4c29cda..e9f4a9c 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
@@ -74,6 +74,8 @@ These nodes must have the following properties:
   which will generate the MSI.
 - reg: Specifies the base physical address and size of the ITS
   registers.
+- two-level-route: This is an optional property which means enable the two level
+  route property when look up route table.
 
 The main GIC node must contain the appropriate #address-cells,
 #size-cells and ranges properties for the reg property of all ITS
@@ -97,6 +99,7 @@ Examples:
 
 		gic-its@...00000 {
 			compatible = "arm,gic-v3-its";
+			two-level-route;
 			msi-controller;
 			#msi-cells = <1>;
 			reg = <0x0 0x2c200000 0 0x200000>;
-- 
1.7.12.4