[PATCH 4/4] tpm: Add YAML schema for the TPM TIS I2C options

[Johannes Holland]

Add a YAML schema to support device tree bindings for the generic I2C
physical layer. Refer to the TCG PC Client Platform TPM Profile (PTP)
Specification for TPM 2.0 v1.04 Revision 14.

Signed-off-by: Johannes Holland <johannes.holland@xxxxxxxxxxxx>
---
 .../bindings/security/tpm/tpm-tis-i2c.yaml    | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml

diff --git a/Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml b/Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml
new file mode 100644
index 000000000000..7948867ff3f7
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/security/tpm/tpm-tis-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C PTP based TPM Device Tree Bindings
+
+maintainers:
+  - Johannes Holland <johannes.holland@xxxxxxxxxxxx>
+
+description:
+  Device Tree Bindings for I2C based Trusted Platform Module (TPM).
+
+properties:
+  compatible:
+    items:
+      - enum:
+          # Infineon's Trusted Platform Module (TPM) (SLB9673)
+          - infineon,slb9673
+          # Nuvoton's Trusted Platform Module (TPM) (NPCT75x)
+          - nuvoton,npct75x
+      - const: tcg,tpm-tis-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupt:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      tpm@2e {
+        compatible = "infineon,slb9673", "nuvoton,npct75x", "tcg,tpm-tis-i2c";
+        reg = <0x2e>;
+      };
+    };
+...
-- 
2.31.1.windows.1