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Subject[PATCH v4 1/2] dt-bindings: firmware: Add Open Profile for DICE
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Add DeviceTree bindings for Open Profile for DICE, an open protocol for
measured boot. Firmware uses DICE to measure the hardware/software
combination and generates Compound Device Identifier (CDI) certificates.
These are stored in memory and the buffer is described in the DT as
a reserved memory region referenced by a compatible device node.

Signed-off-by: David Brazdil <dbrazdil@google.com>
---
.../bindings/firmware/google,open-dice.yaml | 51 +++++++++++++++++++
1 file changed, 51 insertions(+)
create mode 100644 Documentation/devicetree/bindings/firmware/google,open-dice.yaml

diff --git a/Documentation/devicetree/bindings/firmware/google,open-dice.yaml b/Documentation/devicetree/bindings/firmware/google,open-dice.yaml
new file mode 100644
index 000000000000..1aa69f381b8c
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/google,open-dice.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/google,open-dice.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Open Profile for DICE Device Tree Bindings
+
+description: |
+ This binding represents a reserved memory region containing data
+ generated by the Open Profile for DICE protocol.
+
+ See https://pigweed.googlesource.com/open-dice/
+
+maintainers:
+ - David Brazdil <dbrazdil@google.com>
+
+properties:
+ compatible:
+ enum:
+ - google,open-dice
+
+ memory-region:
+ maxItems: 1
+ description: |
+ phandle to the reserved memory node to be associated with the device
+ The reserved memory node should be defined as per the bindings,
+ Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml
+
+required:
+ - compatible
+ - memory-region
+
+additionalProperties: false
+
+examples:
+ - |
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ dice_reserved: dice@12340000 {
+ reg = <0x00 0x12340000 0x2000>;
+ no-map;
+ };
+ };
+
+ dice {
+ compatible = "google,open-dice";
+ memory-region = <&dice_reserved>;
+ };
--
2.34.1.173.g76aa8bc2d0-goog
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