Add Device Tree bindings for Qualcomm TEE Shared Memory Brige - a mechanism that allows sharing memory buffers between trustzone and the kernel. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx> --- .../bindings/firmware/qcom,shm-bridge.yaml | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml diff --git a/Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml b/Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml new file mode 100644 index 000000000000..f660962b7b86 --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/firmware/qcom,shm-bridge.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: QCOM Shared Memory Bridge + +description: | + Qualcomm TEE Shared Memory Bridge allows sharing limited areas of kernel's + virtual memory with the trustzone in order to avoid mapping the entire RAM. + +maintainers: + - Bjorn Andersson <andersson@xxxxxxxxxx> + - Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> + - Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx> + +properties: + compatible: + items: + - enum: + - qcom,shm-bridge-sa8775p + - qcom,shm-bridge-sm8150 + - qcom,shm-bridge-sm8450 + - const: qcom,shm-bridge + +required: + - compatible + +additionalProperties: false + +examples: + - | + firmware { + compatible = "qcom,shm-bridge-sa8775p", "qcom,shm-bridge"; + }; -- 2.39.2
