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Fri, 12 Jul 2024 06:23:23 +0000 From: Pankaj Gupta Date: Fri, 12 Jul 2024 11:49:57 +0530 Subject: [PATCH v5 2/5] dt-bindings: arm: fsl: add imx-se-fw binding doc Message-Id: <20240712-imx-se-if-v5-2-66a79903a872@nxp.com> References: <20240712-imx-se-if-v5-0-66a79903a872@nxp.com> In-Reply-To: <20240712-imx-se-if-v5-0-66a79903a872@nxp.com> To: Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Pankaj Gupta , Rob Herring Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1720765211; l=3836; i=pankaj.gupta@nxp.com; s=20240523; h=from:subject:message-id; bh=JtbBx0yQoAaTNbWkXdPsH4Vzzy2ZXxKhbLKP3eswoUE=; b=FoPJl8139JYtMzDo57U2+jgE2gfklxXOgwI+g0WFJroaILiVrFerVBH+eBaiIPzfYrqZ8G/QT vHNMEK7caPaA76ctpfjCa3TtRMQXwULNlWsfdR4ZmqUrwFzmDmXuv85 X-Developer-Key: i=pankaj.gupta@nxp.com; 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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 --- .../devicetree/bindings/firmware/fsl,imx-se.yaml | 111 +++++++++++++++++++++ 1 file changed, 111 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..bd99505de6e6 --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/fsl,imx-se.yaml @@ -0,0 +1,111 @@ +# 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 is based on the + messaging unit(s). + +properties: + $nodename: + pattern: "firmware@[0-9a-f]+$" + + compatible: + enum: + - fsl,imx8ulp-se + - fsl,imx93-se + - fsl,imx95-se + + reg: + maxItems: 1 + description: Identifier of the communication interface to secure-enclave. + + mboxes: + items: + - description: mailbox phandle to send message to se firmware + - description: mailbox phandle to receive message from se firmware + + mbox-names: + description: two names are to be listed, one for rx and other one for tx. + The name can be any of the below list. + items: + - const: tx + - const: rx + + memory-region: + items: + - description: The phandle to the reserved external memory, the only + accessible memoryregion to secure enclave(SE) firmware. It is an + optional property based on compatible. + (see bindings/reserved-memory/reserved-memory.txt) + + sram: + items: + - description: It is an optional property based on compatible. + +required: + - compatible + - reg + - mboxes + - mbox-names + +allOf: + # memory-region + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8ulp-se + - fsl,imx93-se + then: + required: + - memory-region + else: + properties: + memory-region: false + + # sram + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8ulp-se + then: + required: + - sram + + else: + properties: + sram: false + +additionalProperties: false + +examples: + - | + firmware { + #address-cells = <1>; + #size-cells = <0>; + firmware@0 { + compatible = "fsl,imx95-se"; + reg = <0x0>; + mboxes = <&ele_mu0 0 0>, <&ele_mu0 1 0>; + mbox-names = "tx", "rx"; + }; + }; +...