[PATCH v2] schemas: Add Google Widevine initialization parameters

[Yi Chou <yich@chromium.org>]

The necessary fields to initialize the Widevine related functions in
OP-TEE.
Widevine is Google's content protection system for DRM (Digital rights
management) contents.

Signed-off-by: Yi Chou <yich@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

---
The previous discussion in the OP-TEE:
https://github.com/OP-TEE/optee_os/pull/6418
The reviewer prefer us remove the compatible string.
And they prefer the /options/op-tee/widevine node.

Changes in v2:
- Change all "widevine" to "Widevine".
- Fix the prefix of properties.
- Add the description of Widevine in description.
- Add the usage restriction in the description.

 .../options/op-tee/google,widevine.yaml       | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 dtschema/schemas/options/op-tee/google,widevine.yaml

diff --git a/dtschema/schemas/options/op-tee/google,widevine.yaml b/dtschema/schemas/options/op-tee/google,widevine.yaml
new file mode 100644
index 0000000..742e519
--- /dev/null
+++ b/dtschema/schemas/options/op-tee/google,widevine.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/options/op-tee/google,widevine.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google Widevine initialization parameters
+
+maintainers:
+  - Jeffrey Kardatzke <jkardatzke@chromium.org>
+  - Yi Chou <yich@chromium.org>
+
+description:
+  Widevine is Google's content protection system for DRM (digital rights
+  management) contents.
+  The necessary fields to initialize the Widevine related functions in
+  OP-TEE. This node does not represent a real device, but serves as a
+  place for passing data between firmware and OP-TEE.
+  The content of this node should not be shared with the Linux kernel.
+
+properties:
+  op-tee,hardware-unique-key:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    maxItems: 32
+    description: |
+      The hardware-unique key of the OP-TEE. It will be used to derive
+      the secure storage key.
+      For more information, please reference:
+      https://optee.readthedocs.io/en/latest/architecture/porting_guidelines.html#hardware-unique-key
+
+  tcg,tpm-auth-public-key:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    maxItems: 1024
+    description: |
+      The TPM auth public key. Used to communicate the TPM from OP-TEE.
+      The format of data should be TPM2B_PUBLIC.
+      For more information, please reference the 12.2.5 section:
+      https://trustedcomputinggroup.org/wp-content/uploads/TCG_TPM2_r1p59_Part2_Structures_pub.pdf
+
+  google,widevine-root-of-trust-ecc-p256:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    maxItems: 32
+    description: |
+      The Widevine root of trust secret. Used to sign the Widevine
+      request in OP-TEE. The value is an ECC NIST P-256 scalar.
+      For more information, please reference the G.1.2 section:
+      https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-186.pdf
+
+required:
+  - op-tee,hardware-unique-key
+  - tcg,tpm-auth-public-key
+  - google,widevine-root-of-trust-ecc-p256
+
+additionalProperties: false
+
+examples:
+  - |
+    options {
+      google,widevine {
+        op-tee,hardware-unique-key = [
+          12 f7 98 d2 0e d2 85 92 a5 82 bf 98 b8 99 2b c0
+          c6 6f 19 85 79 86 65 18 55 eb ff 9b 6c c0 ac 27
+        ];
+        tcg,tpm-auth-public-key = [
+          00 76 00 23 00 0b 00 02 04 b2 00 20 e1 47 bf 27
+          e1 74 30 c8 16 ab 72 4d 5c 77 e1 5c 61 2d 56 81
+          b3 35 cd 9d eb 67 41 37 69 f0 32 41 00 10 00 10
+          00 03 00 10 00 20 70 9a df 50 f9 0f d5 f4 40 e0
+          ea 2c e8 f2 26 9f 0e 5c 02 70 16 c3 6c c1 83 03
+          2d 04 10 bd 85 7a 00 20 83 03 c2 66 6e 01 32 34
+          5c 5e 80 22 c7 48 24 3c 70 6b b8 e4 24 42 74 a9
+          cf fc ab f8 30 e9 de 51
+        ];
+        google,widevine-root-of-trust-ecc-p256 = [
+          ac 0d 86 c3 d7 b5 b7 a2 6f c3 d9 93 f7 de bc bb
+          d5 c4 25 9b 21 5f 36 af b5 dd 6d 29 9d 08 c0 10
+        ];
+      };
+    };
-- 
2.42.0.869.gea05f2083d-goog