Add compatible string "fsl,imx-rproc-psci" for i.MX Cortex-A Core's remoteproc support.
Signed-off-by: Jiafei Pan <[email protected]> --- Changes in v4: - Updated description to describe the hardware instead of the binding - Changed compatible to SoC-specific "fsl,imx93-rproc-psci" with generic fallback "fsl,imx-rproc-psci" - Fixed example node name from "remoteproc-ca55-1" to "remoteproc" --- .../remoteproc/fsl,imx-rproc-psci.yaml | 54 +++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml new file mode 100644 index 000000000000..7d0d0da383a2 --- /dev/null +++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/remoteproc/fsl,imx-rproc-psci.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP i.MX Cortex-A Core Remote Processor via PSCI + +maintainers: + - Jiafei Pan <[email protected]> + +description: + NXP i.MX SoCs integrate multiple Cortex-A cores. On certain i.MX + platforms, one or more of these cores can be offloaded to run RTOS + or bare-metal firmware as a remote processor, while the remaining + cores run Linux. The cores are powered on and off via PSCI (Power + State Coordination Interface) CPU_ON/CPU_OFF calls to the firmware. + +properties: + compatible: + items: + - enum: + - fsl,imx93-ca55-rproc + - const: fsl,imx-rproc-psci + + fsl,cpus-mask: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Bitmask indicating which CPU cores are assigned to this remote + processor instance. Each bit represents a CPU core, where bit N + corresponds to CPU N. For example, 0x2 (0b10) assigns CPU core 1, + while 0x6 (0b110) assigns CPU cores 1 and 2. + + memory-region: + maxItems: 1 + description: + Phandle to a reserved memory region to be used for the remote + processor's code and data. + +required: + - compatible + - fsl,cpus-mask + - memory-region + +additionalProperties: false + +examples: + - | + remoteproc { + compatible = "fsl,imx93-ca55-rproc", "fsl,imx-rproc-psci"; + /* bitmask: 0b10, assign A55 Core 1 */ + fsl,cpus-mask = <0x2>; + memory-region = <&rtos_ca55_reserved>; + }; -- 2.43.0
