[PATCH v3 1/5] dt-bindings: iommu: Add Allwinner H6 IOMMU bindings

Maxime Ripard maxime at cerno.tech
Tue May 5 10:09:30 UTC 2020


The Allwinner H6 has introduced an IOMMU. Let's add a device tree binding
for it.

Reviewed-by: Rob Herring <robh at kernel.org>
Signed-off-by: Maxime Ripard <maxime at cerno.tech>
---
 Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml

diff --git a/Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml b/Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml
new file mode 100644
index 000000000000..5e125cf2a88b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/allwinner,sun50i-h6-iommu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner H6 IOMMU Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <wens at csie.org>
+  - Maxime Ripard <mripard at kernel.org>
+
+properties:
+  "#iommu-cells":
+    const: 1
+    description:
+      The content of the cell is the master ID.
+
+  compatible:
+    const: allwinner,sun50i-h6-iommu
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - "#iommu-cells"
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+      #include <dt-bindings/interrupt-controller/arm-gic.h>
+      #include <dt-bindings/interrupt-controller/irq.h>
+
+      #include <dt-bindings/clock/sun50i-h6-ccu.h>
+      #include <dt-bindings/reset/sun50i-h6-ccu.h>
+
+      iommu: iommu at 30f0000 {
+          compatible = "allwinner,sun50i-h6-iommu";
+          reg = <0x030f0000 0x10000>;
+          interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+          clocks = <&ccu CLK_BUS_IOMMU>;
+          resets = <&ccu RST_BUS_IOMMU>;
+          #iommu-cells = <1>;
+      };
+
+...
-- 
git-series 0.9.1


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