linux-kernel - [PATCH v4 2/3] dt-bindings: iommu: Add documentation for rockchip iommu

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Message-Id: <1413272705-9111-3-git-send-email-djkurtz@chromium.org>
Date:	Tue, 14 Oct 2014 15:45:04 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Grant Grundler <grundler@...omium.org>,
	Stéphane Marchesin <marcheu@...omium.org>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Simon Xue <xxm@...k-chips.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND...),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4 2/3] dt-bindings: iommu: Add documentation for rockchip iommu

Add binding documentation for Rockchip IOMMU.

Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>
Signed-off-by: Simon Xue <xxm@...k-chips.com>
---
 .../devicetree/bindings/iommu/rockchip,iommu.txt   | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iommu/rockchip,iommu.txt

diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
new file mode 100644
index 0000000..810e058a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
@@ -0,0 +1,26 @@
+Rockchip IOMMU
+==============
+
+A Rockchip DRM iommu translates io virtual addresses to physical addresses for
+its master device.  Each slave device is bound to a single master device, and
+shares its clocks, power domain and irq.
+
+Required properties:
+- compatible      : Should be "rockchip,iommu"
+- reg             : Address space for the configuration registers
+- interrupts      : Interrupt specifier for the IOMMU instance
+- interrupt-names : Interrupt name for the IOMMU instance
+- #iommu-cells    : Should be <0>.  This indicates the iommu is a
+                    "single-master" device, and needs no additional information
+                    to associate with its master device.  See:
+                    Documentation/devicetree/bindings/iommu/iommu.txt
+
+Example:
+
+	vopl_mmu: iommu@...f940300 {
+		compatible = "rockchip,iommu";
+		reg = <0xff940300 0x100>;
+		interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "vopl_mmu";
+		#iommu-cells = <0>;
+	};
-- 
2.1.0.rc2.206.gedb03e5

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