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 Bindings 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,imx8mq-cm4 19 - fsl,imx8mm-cm4 20 - fsl,imx7d-cm4 21 - fsl,imx6sx-cm4 22 23 clocks: 24 maxItems: 1 25 26 syscon: 27 $ref: /schemas/types.yaml#/definitions/phandle 28 description: 29 Phandle to syscon block which provide access to System Reset Controller 30 31 mbox-names: 32 items: 33 - const: tx 34 - const: rx 35 - const: rxdb 36 37 mboxes: 38 description: 39 This property is required only if the rpmsg/virtio functionality is used. 40 List of <&phandle type channel> - 1 channel for TX, 1 channel for RX, 1 channel for RXDB. 41 (see mailbox/fsl,mu.yaml) 42 minItems: 1 43 maxItems: 3 44 45 memory-region: 46 description: 47 If present, a phandle for a reserved memory area that used for vdev buffer, 48 resource table, vring region and others used by remote processor. 49 minItems: 1 50 maxItems: 32 51 52 fsl,auto-boot: 53 $ref: /schemas/types.yaml#/definitions/flag 54 description: 55 Indicate whether need to load the default firmware and start the remote 56 processor automatically. 57 58required: 59 - compatible 60 - clocks 61 - syscon 62 63additionalProperties: false 64 65examples: 66 - | 67 #include <dt-bindings/clock/imx7d-clock.h> 68 m4_reserved_sysmem1: cm4@80000000 { 69 reg = <0x80000000 0x80000>; 70 }; 71 72 m4_reserved_sysmem2: cm4@81000000 { 73 reg = <0x81000000 0x80000>; 74 }; 75 76 imx7d-cm4 { 77 compatible = "fsl,imx7d-cm4"; 78 memory-region = <&m4_reserved_sysmem1>, <&m4_reserved_sysmem2>; 79 syscon = <&src>; 80 clocks = <&clks IMX7D_ARM_M4_ROOT_CLK>; 81 }; 82 83 - | 84 #include <dt-bindings/clock/imx8mm-clock.h> 85 86 imx8mm-cm4 { 87 compatible = "fsl,imx8mm-cm4"; 88 clocks = <&clk IMX8MM_CLK_M4_DIV>; 89 mbox-names = "tx", "rx", "rxdb"; 90 mboxes = <&mu 0 1 91 &mu 1 1 92 &mu 3 1>; 93 memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>, <&rsc_table>; 94 syscon = <&src>; 95 }; 96... 97