1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: "http://devicetree.org/schemas/remoteproc/fsl,imx-rproc.yaml#" 5$schema: "http://devicetree.org/meta-schemas/core.yaml#" 6 7title: NXP i.MX Co-Processor 8 9description: 10 This binding provides support for ARM Cortex M4 Co-processor found on some NXP iMX SoCs. 11 12maintainers: 13 - Peng Fan <peng.fan@nxp.com> 14 15properties: 16 compatible: 17 enum: 18 - fsl,imx6sx-cm4 19 - fsl,imx7d-cm4 20 - fsl,imx7ulp-cm4 21 - fsl,imx8mm-cm4 22 - fsl,imx8mn-cm7 23 - fsl,imx8mp-cm7 24 - fsl,imx8mq-cm4 25 - fsl,imx8ulp-cm33 26 - fsl,imx93-cm33 27 28 clocks: 29 maxItems: 1 30 31 syscon: 32 $ref: /schemas/types.yaml#/definitions/phandle 33 description: 34 Phandle to syscon block which provide access to System Reset Controller 35 36 mbox-names: 37 items: 38 - const: tx 39 - const: rx 40 - const: rxdb 41 42 mboxes: 43 description: 44 This property is required only if the rpmsg/virtio functionality is used. 45 List of <&phandle type channel> - 1 channel for TX, 1 channel for RX, 1 channel for RXDB. 46 (see mailbox/fsl,mu.yaml) 47 minItems: 1 48 maxItems: 3 49 50 memory-region: 51 description: 52 If present, a phandle for a reserved memory area that used for vdev buffer, 53 resource table, vring region and others used by remote processor. 54 minItems: 1 55 maxItems: 32 56 57 fsl,auto-boot: 58 $ref: /schemas/types.yaml#/definitions/flag 59 description: 60 Indicate whether need to load the default firmware and start the remote 61 processor automatically. 62 63required: 64 - compatible 65 66additionalProperties: false 67 68examples: 69 - | 70 #include <dt-bindings/clock/imx7d-clock.h> 71 m4_reserved_sysmem1: cm4@80000000 { 72 reg = <0x80000000 0x80000>; 73 }; 74 75 m4_reserved_sysmem2: cm4@81000000 { 76 reg = <0x81000000 0x80000>; 77 }; 78 79 imx7d-cm4 { 80 compatible = "fsl,imx7d-cm4"; 81 memory-region = <&m4_reserved_sysmem1>, <&m4_reserved_sysmem2>; 82 syscon = <&src>; 83 clocks = <&clks IMX7D_ARM_M4_ROOT_CLK>; 84 }; 85 86 - | 87 #include <dt-bindings/clock/imx8mm-clock.h> 88 89 imx8mm-cm4 { 90 compatible = "fsl,imx8mm-cm4"; 91 clocks = <&clk IMX8MM_CLK_M4_DIV>; 92 mbox-names = "tx", "rx", "rxdb"; 93 mboxes = <&mu 0 1 94 &mu 1 1 95 &mu 3 1>; 96 memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>, <&rsc_table>; 97 syscon = <&src>; 98 }; 99... 100