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Date: Mon, 7 Jun 2021 14:39:28 -0500
From: Rob Herring <robh@...nel.org>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Jason Wang <jasowang@...hat.com>,
Jean-Philippe Brucker <jean-philippe@...aro.org>,
virtualization@...ts.linux-foundation.org
Subject: [PATCH] dt-bindings: virtio: Convert virtio-mmio to DT schema
Convert the virtio-mmio binding to DT schema format.
Cc: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jason Wang <jasowang@...hat.com>
Cc: Jean-Philippe Brucker <jean-philippe@...aro.org>
Cc: virtualization@...ts.linux-foundation.org
Signed-off-by: Rob Herring <robh@...nel.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@...0 {
- compatible = "virtio,mmio";
- reg = <0x3000 0x100>;
- interrupts = <41>;
-
- /* Device has endpoint ID 23 */
- iommus = <&viommu 23>
- }
-
- viommu: iommu@...0 {
- 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@...aro.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@...0 {
+ compatible = "virtio,mmio";
+ reg = <0x3000 0x100>;
+ interrupts = <41>;
+
+ /* Device has endpoint ID 23 */
+ iommus = <&viommu 23>;
+ };
+
+ viommu: iommu@...0 {
+ compatible = "virtio,mmio";
+ reg = <0x3100 0x100>;
+ interrupts = <42>;
+
+ #iommu-cells = <1>;
+ };
+
+...
--
2.27.0
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