BACKPORT: dt/bindings: add bindings for optee
Introduces linaro prefix and adds bindings for ARM TrustZone based OP-TEE
implementation.
Change-Id: I8992ce7476d3cb232600f1691ef698f7403cdc62
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
(cherry picked from commit c8bfafb1594435889b571b79325011e8b7fd087b)
Signed-off-by: Victor Chong <victor.chong@linaro.org>
diff --git a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt
new file mode 100644
index 0000000..d38834c
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt
@@ -0,0 +1,31 @@
+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.
+
+We're using "linaro" as the first part of the compatible property for
+the reference implementation maintained by Linaro.
+
+* OP-TEE based on ARM TrustZone required properties:
+
+- compatible : should contain "linaro,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:
+ firmware {
+ optee {
+ compatible = "linaro,optee-tz";
+ method = "smc";
+ };
+ };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index bceffff..d0526e0 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -156,6 +156,7 @@
lantiq Lantiq Semiconductor
lenovo Lenovo Group Ltd.
lg LG Corporation
+linaro Linaro Limited
linux Linux-specific binding
lltc Linear Technology Corporation
lsi LSI Corp. (LSI Logic)