[PATCH 2/3] iommu: bindings: Add binding documentation for Toshiba Visconti5 IOMMU device

Nobuhiro Iwamatsu
2022-05-25T01:32:53Z

Add documentation for the binding of Toshiba Visconti5 SoC's IOMMU.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
---
.../bindings/iommu/toshiba,visconti-atu.yaml | 62 +++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iommu/toshiba,visconti-atu.yaml

diff --git a/Documentation/devicetree/bindings/iommu/toshiba,visconti-atu.yaml b/Documentation/devicetree/bindings/iommu/toshiba,visconti-atu.yaml
new file mode 100644
index 000000000000..af8d6688fa70
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/toshiba,visconti-atu.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/toshiba,visconti-atu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Toshiba ARM SoC Visconti5 IOMMU (ATU)
+
+maintainers:
+ - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+
+description: |+
+ IOMMU (ATU) driver can bse used for Visconti5's multimedia IPs, such as
+ DCNN (Deep Convolutional Neural Network), VIIF(Video Input), VOIF(Video
+ output), and others.
+
+properties:
+ compatible:
+ const: toshiba,visconti-atu
+
+ reg:
+ maxItems: 1
+
+ "#iommu-cells":
+ const: 0
+
+ toshiba,max-entry:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: The size of entry for address
+ enum:
+ - 16
+ - 32
+
+ toshiba,reserved-entry:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: The reserve number of entry address.
+ default: 0
+ minimum: 0
+ maximum: 32
+
+required:
+ - compatible
+ - reg
+ - "#iommu-cells"
+ - toshiba,max-entry
+
+additionalProperties: false
+
+examples:
+ - |
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ atu_affine0: iommu@1400f000 {
+ compatible = "toshiba,visconti-atu";
+ reg = <0 0x1400F000 0 0x1000>;
+ toshiba,max-entry = <16>;
+ toshiba,reserved-entry = <1>;
+ #iommu-cells = <0>;
+ };
+ };
--
2.36.0