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[1/2] dt-bindings: tpm: Add schema for TIS I2C devices

Message ID 20220913091025.1768882-2-joel@jms.id.au
State Superseded
Headers show
Series [1/2] dt-bindings: tpm: Add schema for TIS I2C devices | expand

Commit Message

Joel Stanley Sept. 13, 2022, 9:10 a.m. UTC 
From: Johannes Holland <johannes.holland@infineon.com>

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.

This includes descriptions for the Nuvoton and Infineon devices.

Signed-off-by: Johannes Holland <johannes.holland@infineon.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
 .../bindings/security/tpm/tpm-tis-i2c.yaml    | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml
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Patch

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..fb7b747ff2a5
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml
@@ -0,0 +1,49 @@ 
+# 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@infineon.com>
+
+description:
+  Device Tree Bindings for I2C based Trusted Platform Module (TPM).
+
+properties:
+  $nodename:
+    pattern: "^tpm(@[0-9a-f]+)?$"
+
+  compatible:
+    oneOf:
+      - description: Infineon's Trusted Platform Module (TPM) (SLB9673).
+        items:
+          - const: infineon,slb9673
+      - description: Nuvoton's Trusted Platform Module (TPM) (NPCT75x).
+        items:
+          - const: nuvoton,npct75x
+          - const: tcg,tpm-tis-i2c
+      - const: tcg,tpm-tis-i2c
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      tpm@2e {
+        compatible = "nuvoton,npct75x", "tcg,tpm-tis-i2c";
+        reg = <0x2e>;
+      };
+    };
+...