[PATCH v2 2/5] dt-bindings: iommu: Add Broadcom BCM2712 IOMMU

[Daniel Drake]

Add bindings for the Broadcom BCM2712 IOMMUs and their shared TLB cache.

Signed-off-by: Daniel Drake <dan at reactivated.net>
---
 .../bindings/iommu/brcm,bcm2712-iommu.yaml         | 48 ++++++++++++++++++++++
 .../bindings/iommu/brcm,bcm2712-iommuc.yaml        | 35 ++++++++++++++++
 2 files changed, 83 insertions(+)

diff --git a/Documentation/devicetree/bindings/iommu/brcm,bcm2712-iommu.yaml b/Documentation/devicetree/bindings/iommu/brcm,bcm2712-iommu.yaml
new file mode 100644
index 000000000000..af4d8bac10e5
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/brcm,bcm2712-iommu.yaml
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/brcm,bcm2712-iommu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM2712 IOMMU
+
+maintainers:
+  - Daniel Drake <dan at reactivated.net>
+
+description:
+  The BCM2712 IOMMU provides address translation for various hardware blocks
+  on the BCM2712 SoC, such as the VC6 display pipeline.
+
+properties:
+  compatible:
+    const: brcm,bcm2712-iommu
+
+  reg:
+    maxItems: 1
+
+  '#iommu-cells':
+    const: 0
+
+  brcm,iommu-cache:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the shared IOMMU cache. The IOMMUC is a shared hardware block
+      that provides centralized Translation Lookaside Buffer (TLB) caching and
+      invalidation.
+
+required:
+  - compatible
+  - reg
+  - '#iommu-cells'
+  - brcm,iommu-cache
+
+additionalProperties: false
+
+examples:
+  - |
+    iommu at 5200 {
+        compatible = "brcm,bcm2712-iommu";
+        reg = <0x5200 0x80>;
+        brcm,iommu-cache = <&iommuc>;
+        #iommu-cells = <0>;
+    };
diff --git a/Documentation/devicetree/bindings/iommu/brcm,bcm2712-iommuc.yaml b/Documentation/devicetree/bindings/iommu/brcm,bcm2712-iommuc.yaml
new file mode 100644
index 000000000000..f22e9be2c473
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/brcm,bcm2712-iommuc.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/brcm,bcm2712-iommuc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM2712 Shared IOMMU Cache (IOMMUC)
+
+maintainers:
+  - Daniel Drake <dan at reactivated.net>
+
+description: |
+  The BCM2712 IOMMU Cache (IOMMUC) provides a shared Translation Lookaside
+  Buffer (TLB) cache used by the primary BCM2712 IOMMUs to speed up address
+  translations.
+
+properties:
+  compatible:
+    const: brcm,bcm2712-iommuc
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    iommuc: iommu-cache at 1001000 {
+        compatible = "brcm,bcm2712-iommuc";
+        reg = <0x1001000 0x100>;
+    };

-- 
2.55.0