[PATCH] dt-bindings: virtio: Convert virtio-mmio to DT schema

* [PATCH] dt-bindings: virtio: Convert virtio-mmio to DT schema
@ 2021-06-07 19:39 ` Rob Herring
  0 siblings, 0 replies; 6+ messages in thread
From: Rob Herring @ 2021-06-07 19:39 UTC (permalink / raw)
  To: Michael S. Tsirkin
  Cc: devicetree, linux-kernel, Jason Wang, Jean-Philippe Brucker,
	virtualization

Convert the virtio-mmio binding to DT schema format.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
Jean-Philippe, hopefully you are okay with being listed as the 
maintainer here. You're the only active person that's touched this 
binding.

 .../devicetree/bindings/virtio/mmio.txt       | 47 ---------------
 .../devicetree/bindings/virtio/mmio.yaml      | 60 +++++++++++++++++++
 2 files changed, 60 insertions(+), 47 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/virtio/mmio.txt
 create mode 100644 Documentation/devicetree/bindings/virtio/mmio.yaml

diff --git a/Documentation/devicetree/bindings/virtio/mmio.txt b/Documentation/devicetree/bindings/virtio/mmio.txt
deleted file mode 100644
index 0a575f329f6e..000000000000
--- a/Documentation/devicetree/bindings/virtio/mmio.txt
+++ /dev/null
@@ -1,47 +0,0 @@
-* virtio memory mapped device
-
-See https://ozlabs.org/~rusty/virtio-spec/ for more details.
-
-Required properties:
-
-- compatible:	"virtio,mmio" compatibility string
-- reg:		control registers base address and size including configuration space
-- interrupts:	interrupt generated by the device
-
-Required properties for virtio-iommu:
-
-- #iommu-cells:	When the node corresponds to a virtio-iommu device, it is
-		linked to DMA masters using the "iommus" or "iommu-map"
-		properties [1][2]. #iommu-cells specifies the size of the
-		"iommus" property. For virtio-iommu #iommu-cells must be
-		1, each cell describing a single endpoint ID.
-
-Optional properties:
-
-- iommus:	If the device accesses memory through an IOMMU, it should
-		have an "iommus" property [1]. Since virtio-iommu itself
-		does not access memory through an IOMMU, the "virtio,mmio"
-		node cannot have both an "#iommu-cells" and an "iommus"
-		property.
-
-Example:
-
-	virtio_block@3000 {
-		compatible = "virtio,mmio";
-		reg = <0x3000 0x100>;
-		interrupts = <41>;
-
-		/* Device has endpoint ID 23 */
-		iommus = <&viommu 23>
-	}
-
-	viommu: iommu@3100 {
-		compatible = "virtio,mmio";
-		reg = <0x3100 0x100>;
-		interrupts = <42>;
-
-		#iommu-cells = <1>
-	}
-
-[1] Documentation/devicetree/bindings/iommu/iommu.txt
-[2] Documentation/devicetree/bindings/pci/pci-iommu.txt
diff --git a/Documentation/devicetree/bindings/virtio/mmio.yaml b/Documentation/devicetree/bindings/virtio/mmio.yaml
new file mode 100644
index 000000000000..444bfa24affc
--- /dev/null
+++ b/Documentation/devicetree/bindings/virtio/mmio.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/virtio/mmio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: virtio memory mapped devices
+
+maintainers:
+  - Jean-Philippe Brucker <jean-philippe@linaro.org>
+
+description:
+  See https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio for
+  more details.
+
+properties:
+  compatible:
+    const: virtio-mmio
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  '#iommu-cells':
+    description: Required when the node corresponds to a virtio-iommu device.
+    const: 1
+
+  iommus:
+    description: Required for devices making accesses thru an IOMMU.
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    virtio@3000 {
+        compatible = "virtio,mmio";
+        reg = <0x3000 0x100>;
+        interrupts = <41>;
+
+        /* Device has endpoint ID 23 */
+        iommus = <&viommu 23>;
+    };
+
+    viommu: iommu@3100 {
+        compatible = "virtio,mmio";
+        reg = <0x3100 0x100>;
+        interrupts = <42>;
+
+        #iommu-cells = <1>;
+    };
+
+...
-- 
2.27.0


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