[PATCH v6 3/6] dt/bindings: add bindings for optee

[Jens Wiklander <jens.wiklander@linaro.org>]

Introduces optee prefix and adds bindings for ARM TrustZone based OP-TEE
implementation.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
---
 .../bindings/arm/firmware/optee,optee-tz.txt       | 29 ++++++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.txt        |  1 +
 2 files changed, 30 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/firmware/optee,optee-tz.txt

diff --git a/Documentation/devicetree/bindings/arm/firmware/optee,optee-tz.txt b/Documentation/devicetree/bindings/arm/firmware/optee,optee-tz.txt
new file mode 100644
index 0000000..0a8ed0d
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/firmware/optee,optee-tz.txt
@@ -0,0 +1,29 @@
+OP-TEE Device Tree Bindings
+
+OP-TEE is a piece of software using hardware features to provide a Trusted
+Execution Environment. The security can be provided with ARM TrustZone, but
+also by virtualization or a separate chip. As there's no single OP-TEE
+vendor we're using "optee" as the first part of compatible property,
+indicating the OP-TEE protocol is used when communicating with the secure
+world.
+
+* OP-TEE based on ARM TrustZone required properties:
+
+- compatible     : should contain "optee,optee-tz"
+
+- method         : The method of calling the OP-TEE Trusted OS. Permitted
+                   values are:
+
+                   "smc" : SMC #0, with the register assignments specified
+		           in drivers/tee/optee/optee_smc.h
+
+                   "hvc" : HVC #0, with the register assignments specified
+		           in drivers/tee/optee/optee_smc.h
+
+
+
+Example:
+	optee {
+		compatible = "optee,optee-tz";
+		method = "smc";
+	};
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 82d2ac9..38e632f 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -159,6 +159,7 @@ nxp	NXP Semiconductors
 okaya	Okaya Electric America, Inc.
 onnn	ON Semiconductor Corp.
 opencores	OpenCores.org
+optee	OP-TEE, Open Portable Trusted Execution Environment
 option	Option NV
 ortustech	Ortus Technology Co., Ltd.
 ovti	OmniVision Technologies
-- 
1.9.1