xref: /linux/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml (revision 9dbbc3b9d09d6deba9f3b9e1d5b355032ed46a75) 
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,imx8mn-cm7
21      - fsl,imx8mp-cm7
22      - fsl,imx8ulp-cm33
23      - fsl,imx7d-cm4
24      - fsl,imx7ulp-cm4
25      - fsl,imx6sx-cm4
26
27  clocks:
28    maxItems: 1
29
30  syscon:
31    $ref: /schemas/types.yaml#/definitions/phandle
32    description:
33      Phandle to syscon block which provide access to System Reset Controller
34
35  mbox-names:
36    items:
37      - const: tx
38      - const: rx
39      - const: rxdb
40
41  mboxes:
42    description:
43      This property is required only if the rpmsg/virtio functionality is used.
44      List of <&phandle type channel> - 1 channel for TX, 1 channel for RX, 1 channel for RXDB.
45      (see mailbox/fsl,mu.yaml)
46    minItems: 1
47    maxItems: 3
48
49  memory-region:
50    description:
51      If present, a phandle for a reserved memory area that used for vdev buffer,
52      resource table, vring region and others used by remote processor.
53    minItems: 1
54    maxItems: 32
55
56  fsl,auto-boot:
57    $ref: /schemas/types.yaml#/definitions/flag
58    description:
59      Indicate whether need to load the default firmware and start the remote
60      processor automatically.
61
62required:
63  - compatible
64
65additionalProperties: false
66
67examples:
68  - |
69    #include <dt-bindings/clock/imx7d-clock.h>
70    m4_reserved_sysmem1: cm4@80000000 {
71      reg = <0x80000000 0x80000>;
72    };
73
74    m4_reserved_sysmem2: cm4@81000000 {
75      reg = <0x81000000 0x80000>;
76    };
77
78    imx7d-cm4 {
79      compatible	= "fsl,imx7d-cm4";
80      memory-region	= <&m4_reserved_sysmem1>, <&m4_reserved_sysmem2>;
81      syscon		= <&src>;
82      clocks		= <&clks IMX7D_ARM_M4_ROOT_CLK>;
83    };
84
85  - |
86    #include <dt-bindings/clock/imx8mm-clock.h>
87
88    imx8mm-cm4 {
89      compatible = "fsl,imx8mm-cm4";
90      clocks = <&clk IMX8MM_CLK_M4_DIV>;
91      mbox-names = "tx", "rx", "rxdb";
92      mboxes = <&mu 0 1
93                &mu 1 1
94                &mu 3 1>;
95      memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>, <&rsc_table>;
96      syscon = <&src>;
97    };
98...
99