On Mon, Aug 18, 2025 at 03:44:17PM -0500, Shenwei Wang wrote: > Remote processors may announce multiple devices (e.g., I2C, GPIO) over > an RPMSG channel. These devices may require corresponding device tree > nodes, especially when acting as providers, to supply phandles for their > consumers. > > Define an RPMSG node to work as a container for a group of RPMSG channels > under the imx_rproc node. > > Each subnode within "rpmsg" represents an individual RPMSG channel. The > name of each subnode corresponds to the channel name as defined by the > remote processor. > > All remote devices associated with a given channel are defined as child > nodes under the corresponding channel node. > > Signed-off-by: Shenwei Wang <shenwei.w...@nxp.com>
Reviewed-by: Frank Li <frank...@nxp.com> > --- > .../bindings/remoteproc/fsl,imx-rproc.yaml | 117 ++++++++++++++++++ > 1 file changed, 117 insertions(+) > > diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml > b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml > index 57d75acb0b5e..a105aac798d0 100644 > --- a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml > +++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml > @@ -84,6 +84,86 @@ properties: > This property is to specify the resource id of the remote processor in > SoC > which supports SCFW > > + rpmsg: > + type: object > + additionalProperties: false > + description: > + Present a group of RPMSG channel devices. > + > + properties: > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 0 > + > + rpmsg-io-channel: > + type: object > + unevaluatedProperties: false > + properties: > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 0 > + > + patternProperties: > + "gpio@[0-9a-f]+$": > + type: object > + unevaluatedProperties: false > + properties: > + compatible: > + enum: > + - fsl,imx-rpmsg-gpio > + > + reg: > + maxItems: 1 > + > + required: > + - compatible > + - reg > + > + allOf: > + - $ref: /schemas/gpio/gpio.yaml# > + - $ref: /schemas/interrupt-controller.yaml# > + > + required: > + - '#address-cells' > + - '#size-cells' > + > + rpmsg-i2c-channel: > + type: object > + unevaluatedProperties: false > + properties: > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 0 > + > + patternProperties: > + "i2c@[0-9a-f]+$": > + type: object > + unevaluatedProperties: false > + properties: > + compatible: > + enum: > + - fsl,imx-rpmsg-i2c > + > + reg: > + maxItems: 1 > + > + required: > + - compatible > + - reg > + > + allOf: > + - $ref: /schemas/i2c/i2c-controller.yaml# > + > + required: > + - '#address-cells' > + - '#size-cells' > + > required: > - compatible > > @@ -146,5 +226,42 @@ examples: > &mu 3 1>; > memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>, > <&rsc_table>; > syscon = <&src>; > + > + rpmsg { > + rpmsg-io-channel { > + #address-cells = <1>; > + #size-cells = <0>; > + > + gpio@0 { > + compatible = "fsl,imx-rpmsg-gpio"; > + reg = <0>; > + gpio-controller; > + #gpio-cells = <2>; > + #interrupt-cells = <2>; > + interrupt-controller; > + interrupt-parent = <&rpmsg_gpioa>; > + }; > + > + gpio@1 { > + compatible = "fsl,imx-rpmsg-gpio"; > + reg = <1>; > + gpio-controller; > + #gpio-cells = <2>; > + #interrupt-cells = <2>; > + interrupt-controller; > + interrupt-parent = <&rpmsg_gpiob>; > + }; > + }; > + > + rpmsg-i2c-channel { > + #address-cells = <1>; > + #size-cells = <0>; > + > + i2c@0 { > + compatible = "fsl,imx-rpmsg-i2c"; > + reg = <0>; > + }; > + }; > + }; > }; > ... > -- > 2.43.0 >