Document the secvio device tree bindings. The tampers are security feature available on i.MX products and managed by SNVS block.The tamper goal is to detect the variation of hardware or physical parameters, which can indicate an attack. The SNVS, which provides secure non-volatile storage, allows to detect some hardware attacks against the SoC.They are connected to the security-violation ports, which send an alert when an out-of-range value is detected. The "imx-secvio-sc" module is designed to report security violations and tamper triggering via SCU firmware to the user. Add the imx-scu secvio sub node and secvio sub node description. Signed-off-by: Franck LENORMAND <franck.lenormand@xxxxxxx> Signed-off-by: Vabhav Sharma <vabhav.sharma@xxxxxxx> --- .../bindings/arm/freescale/fsl,scu-secvio.yaml | 35 ++++++++++++++++++++++ .../devicetree/bindings/firmware/fsl,scu.yaml | 10 +++++++ 2 files changed, 45 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu-secvio.yaml b/Documentation/devicetree/bindings/arm/freescale/fsl,scu-secvio.yaml new file mode 100644 index 000000000000..30dc1e21f903 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu-secvio.yaml @@ -0,0 +1,35 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/arm/freescale/fsl,scu-secvio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP i.MX Security Violation driver + +maintainers: + - Franck LENORMAND <franck.lenormand@xxxxxxx> + +description: | + Receive security violation from the SNVS via the SCU firmware. Allow to + register notifier for additional processing + +properties: + compatible: + enum: + - fsl,imx-sc-secvio + + nvmem: + maxItems: 1 + +required: + - compatible + - nvmem + +additionalProperties: false + +examples: + - | + secvio { + compatible = "fsl,imx-sc-secvio"; + nvmem = <&ocotp>; + }; diff --git a/Documentation/devicetree/bindings/firmware/fsl,scu.yaml b/Documentation/devicetree/bindings/firmware/fsl,scu.yaml index 557e524786c2..b40e127fdc88 100644 --- a/Documentation/devicetree/bindings/firmware/fsl,scu.yaml +++ b/Documentation/devicetree/bindings/firmware/fsl,scu.yaml @@ -129,6 +129,11 @@ properties: RTC controller provided by the SCU $ref: /schemas/rtc/fsl,scu-rtc.yaml + secvio: + description: + Receive security violation from the SNVS via the SCU firmware + $ref: /schemas/arm/freescale/fsl,scu-secvio.yaml + thermal-sensor: description: Thermal sensor provided by the SCU @@ -197,6 +202,11 @@ examples: compatible = "fsl,imx8qxp-sc-rtc"; }; + secvio { + compatible = "fsl,imx-sc-secvio"; + nvmem = <&ocotp>; + }; + keys { compatible = "fsl,imx8qxp-sc-key", "fsl,imx-sc-key"; linux,keycodes = <KEY_POWER>; -- 2.25.1
