Bindings/arm/firmware/linaro,optee-tz.yaml

   1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/arm/firmware/linaro,optee-tz.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: OP-TEE
   8
   9 maintainers:
  10   - Jens Wiklander <jens.wiklander@linaro.org>
  11
  12 description: |
  13   OP-TEE is a piece of software using hardware features to provide a Trusted
  14   Execution Environment. The security can be provided with ARM TrustZone, but
  15   also by virtualization or a separate chip.
  16
  17   We're using "linaro" as the first part of the compatible property for
  18   the reference implementation maintained by Linaro.
  19
  20 properties:
  21   $nodename:
  22     const: optee
  23
  24   compatible:
  25     const: linaro,optee-tz
  26
  27   interrupts:
  28     maxItems: 1
  29     description: |
  30       This interrupt which is used to signal an event by the secure world
  31       software is expected to be either a per-cpu interrupt or an
  32       edge-triggered peripheral interrupt.
  33
  34   method:
  35     enum: [smc, hvc]
  36     description: |
  37       The method of calling the OP-TEE Trusted OS depending on smc or hvc
  38       instruction usage.
  39       SMC #0, register assignments
  40       or
  41       HVC #0, register assignments
  42       register assignments are specified in drivers/tee/optee/optee_smc.h
  43
  44 required:
  45   - compatible
  46   - method
  47
  48 additionalProperties: false
  49
  50 examples:
  51   - |
  52     #include <dt-bindings/interrupt-controller/arm-gic.h>
  53     firmware  {
  54         optee  {
  55             compatible = "linaro,optee-tz";
  56             method = "smc";
  57             interrupts = <GIC_SPI 187 IRQ_TYPE_EDGE_RISING>;
  58         };
  59     };
  60
  61   - |
  62     firmware  {
  63         optee  {
  64             compatible = "linaro,optee-tz";
  65             method = "hvc";
  66         };
  67     };