linux-kernel - [PATCH 2/3] Docs: dt: fsl-mc update binding to include definition of ranges

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Date:	Fri, 25 Sep 2015 16:08:05 -0500
From:	Stuart Yoder <stuart.yoder@...escale.com>
To:	<robh+dt@...nel.org>, <mark.rutland@....com>
CC:	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<german.rivera@...escale.com>, <bhupesh.sharma@...escale.com>,
	<itai.katz@...escale.com>,
	Stuart Yoder <stuart.yoder@...escale.com>
Subject: [PATCH 2/3] Docs: dt: fsl-mc update binding to include definition of ranges

Define a ranges property to specify the mapping between
the MC address space and the system address space.

Signed-off-by: Stuart Yoder <stuart.yoder@...escale.com>
---
 .../devicetree/bindings/misc/fsl,qoriq-mc.txt      | 30 +++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
index 6aac955..848975f 100644
--- a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
+++ b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
@@ -35,6 +35,26 @@ Required properties:
         Definition: Must be present and point to the MSI controller node
                     handling message interrupts for the MC.
 
+    - ranges
+        Value type: <prop-encoded-array>
+        Definition: A standard property.  Defines the mapping between the child
+                    MC address space and the parent system address space.
+
+                    The MC address space is defined by 3 components:
+                       <region type> <offset hi> <offset lo>
+
+                    Valid values for region type are
+                       0x0 - MC portals
+                       0x1 - QBMAN portals
+
+    - #address-cells
+        Value type: <u32>
+        Definition: Must be 3.  (see definition in 'ranges' property)
+
+    - #size-cells
+        Value type: <u32>
+        Definition: Must be 1.
+
 Example:
 
         fsl_mc: fsl-mc@...000000 {
@@ -42,5 +62,13 @@ Example:
                 reg = <0x00000008 0x0c000000 0 0x40>,    /* MC portal base */
                       <0x00000000 0x08340000 0 0x40000>; /* MC control reg */
                 msi-parent = <&its>;
-        };
+                #address-cells = <3>;
+                #size-cells = <1>;
 
+                /*
+                 * Region type 0x0 - MC portals
+                 * Region type 0x1 - QBMAN portals
+                 */
+                ranges = <0x0 0x0 0x0 0x8 0x0c000000 0x4000000
+                          0x1 0x0 0x0 0x8 0x18000000 0x8000000>;
+        };
-- 
2.3.3

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