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dt-bindings: arm: firmware: Convert linaro,optee-tz to json schema

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Convert linaro,optee-tz to json schema format for better documentation
and error checks.

NOTE: This change does introduce a stricter naming convention for
optee nodes.

Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20210426164008.20000-1-nm@ti.com
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Nishanth Menon 2021-04-26 11:40:08 -05:00 committed by Rob Herring
parent 5a9652f699
commit be78329717
2 changed files with 58 additions and 31 deletions
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31
Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt
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@ -1,31 +0,0 @@
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";
};
};

58
Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml Normal file
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/arm/firmware/linaro,optee-tz.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: OP-TEE Device Tree Bindings
maintainers:
- Jens Wiklander <jens.wiklander@linaro.org>
description: |
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.
properties:
$nodename:
const: optee
compatible:
const: linaro,optee-tz
method:
enum: [smc, hvc]
description: |
The method of calling the OP-TEE Trusted OS depending on smc or hvc
instruction usage.
SMC #0, register assignments
or
HVC #0, register assignments
register assignments are specified in drivers/tee/optee/optee_smc.h
required:
- compatible
- method
additionalProperties: false
examples:
- |
firmware {
optee {
compatible = "linaro,optee-tz";
method = "smc";
};
};
- |
firmware {
optee {
compatible = "linaro,optee-tz";
method = "hvc";
};
};