linux-kernel - [PATCH v5 06/17] docs: Xen ARM DT bindings

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Date:	Mon, 17 Sep 2012 18:38:52 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	<arnd@...db.de>
CC:	<linux@....linux.org.uk>, <linaro-dev@...ts.linaro.org>,
	<linux-arm-kernel@...ts.infradead.org>, <tim@....org>,
	<Ian.Campbell@...rix.com>, <konrad.wilk@...cle.com>,
	<Stefano.Stabellini@...citrix.com>,
	<xen-devel@...ts.xensource.com>, <linux-kernel@...r.kernel.org>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	<devicetree-discuss@...ts.ozlabs.org>,
	David Vrabel <david.vrabel@...rix.com>,
	Rob Herring <robherring2@...il.com>,
	Dave Martin <dave.martin@...aro.org>
Subject: [PATCH v5 06/17] docs: Xen ARM DT bindings

Add a doc to describe the Xen ARM device tree bindings


Changes in v5:

- add a comment about the size of the grant table memory region;
- add a comment about the required presence of a GIC node;
- specify that the described properties are part of a top-level
"hypervisor" node;
- specify #address-cells and #size-cells for the example.


Changes in v4:

- "xen,xen" should be last as it is less specific;
- update reg property using 2 address-cells and 2 size-cells.


Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
CC: devicetree-discuss@...ts.ozlabs.org
CC: David Vrabel <david.vrabel@...rix.com>
CC: Rob Herring <robherring2@...il.com>
CC: Dave Martin <dave.martin@...aro.org>
---
 Documentation/devicetree/bindings/arm/xen.txt |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/xen.txt

diff --git a/Documentation/devicetree/bindings/arm/xen.txt b/Documentation/devicetree/bindings/arm/xen.txt
new file mode 100644
index 0000000..0f7b9c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/xen.txt
@@ -0,0 +1,25 @@
+* Xen hypervisor device tree bindings
+
+Xen ARM virtual platforms shall have a top-level "hypervisor" node with
+the following properties:
+
+- compatible:
+	compatible = "xen,xen-<version>", "xen,xen";
+  where <version> is the version of the Xen ABI of the platform.
+
+- reg: specifies the base physical address and size of a region in
+  memory where the grant table should be mapped to, using an
+  HYPERVISOR_memory_op hypercall. The memory region is large enough to map
+  the whole grant table (it is larger or equal to gnttab_max_grant_frames()).
+
+- interrupts: the interrupt used by Xen to inject event notifications.
+  A GIC node is also required.
+
+
+Example (assuming #address-cells = <2> and #size-cells = <2>):
+
+hypervisor {
+	compatible = "xen,xen-4.3", "xen,xen";
+	reg = <0 0xb0000000 0 0x20000>;
+	interrupts = <1 15 0xf08>;
+};
-- 
1.7.2.5

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