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This driver enables communication ensuring well defined message sequence protocol between Application Core and enclave's firmware. Driver configures multiple misc-device on the MU, for multiple user-space applications, to be able to communicate over single MU. It exists on some i.MX processors. e.g. i.MX8ULP, i.MX93 etc. Signed-off-by: Pankaj Gupta Reviewed-by: Rob Herring (Arm) Signed-off-by: Frank Li --- .../devicetree/bindings/firmware/fsl,imx-se.yaml | 91 ++++++++++++++++++++++ 1 file changed, 91 insertions(+) diff --git a/Documentation/devicetree/bindings/firmware/fsl,imx-se.yaml b/Documentation/devicetree/bindings/firmware/fsl,imx-se.yaml new file mode 100644 index 000000000000..fa81adbf9b80 --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/fsl,imx-se.yaml @@ -0,0 +1,91 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/firmware/fsl,imx-se.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP i.MX HW Secure Enclave(s) EdgeLock Enclave + +maintainers: + - Pankaj Gupta + +description: | + NXP's SoC may contain one or multiple embedded secure-enclave HW + IP(s) like i.MX EdgeLock Enclave, V2X etc. These NXP's HW IP(s) + enables features like + - Hardware Security Module (HSM), + - Security Hardware Extension (SHE), and + - Vehicular to Anything (V2X) + + Communication interface to the secure-enclaves(se) is based on the + messaging unit(s). + +properties: + compatible: + enum: + - fsl,imx8ulp-se-ele-hsm + - fsl,imx93-se-ele-hsm + - fsl,imx95-se-ele-hsm + + mboxes: + items: + - description: mailbox phandle to send message to se firmware + - description: mailbox phandle to receive message from se firmware + + mbox-names: + items: + - const: tx + - const: rx + + memory-region: + maxItems: 1 + + sram: + maxItems: 1 + +required: + - compatible + - mboxes + - mbox-names + +allOf: + # memory-region + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8ulp-se-ele-hsm + - fsl,imx93-se-ele-hsm + then: + required: + - memory-region + else: + properties: + memory-region: false + + # sram + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8ulp-se-ele-hsm + then: + required: + - sram + + else: + properties: + sram: false + +additionalProperties: false + +examples: + - | + secure-enclave { + compatible = "fsl,imx95-se-ele-hsm"; + mboxes = <&ele_mu0 0 0>, <&ele_mu0 1 0>; + mbox-names = "tx", "rx"; + }; +... -- 2.43.0