1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/remoteproc/ti,k3-m4f-rproc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: TI K3 M4F processor subsystems
8
9 maintainers:
10 - Hari Nagalla <hnagalla@ti.com>
11 - Mathieu Poirier <mathieu.poirier@linaro.org>
12
13 description: |
14 Some K3 family SoCs have Arm Cortex M4F cores. AM64x is a SoC in K3
15 family with a M4F core. Typically safety oriented applications may use
16 the M4F core in isolation without an IPC. Where as some industrial and
17 home automation applications, may use the M4F core as a remote processor
18 with IPC communications.
19
20 $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
21
22 properties:
23 compatible:
24 enum:
25 - ti,am64-m4fss
26
27 power-domains:
28 maxItems: 1
29
30 "#address-cells":
31 const: 2
32
33 "#size-cells":
34 const: 2
35
36 reg:
37 items:
38 - description: IRAM internal memory region
39 - description: DRAM internal memory region
40
41 reg-names:
42 items:
43 - const: iram
44 - const: dram
45
46 resets:
47 maxItems: 1
48
49 firmware-name:
50 maxItems: 1
51 description: Name of firmware to load for the M4F core
52
53 mboxes:
54 description:
55 OMAP Mailbox specifier denoting the sub-mailbox, to be used for
56 communication with the remote processor. This property should match
57 with the sub-mailbox node used in the firmware image.
58 maxItems: 1
59
60 memory-region:
61 description:
62 phandle to the reserved memory nodes to be associated with the
63 remoteproc device. Optional memory regions available for firmware
64 specific purposes.
65 (see reserved-memory/reserved-memory.yaml in dtschema project)
66 maxItems: 8
67 items:
68 - description: regions used for DMA allocations like vrings, vring buffers
69 and memory dedicated to firmware's specific purposes.
70 additionalItems: true
71
72 required:
73 - compatible
74 - reg
75 - reg-names
76 - ti,sci
77 - ti,sci-dev-id
78 - ti,sci-proc-ids
79 - resets
80 - firmware-name
81
82 unevaluatedProperties: false
83
84 examples:
85 - |
86 reserved-memory {
87 #address-cells = <2>;
88 #size-cells = <2>;
89
90 mcu_m4fss_dma_memory_region: m4f-dma-memory@9cb00000 {
91 compatible = "shared-dma-pool";
92 reg = <0x00 0x9cb00000 0x00 0x100000>;
93 no-map;
94 };
95
96 mcu_m4fss_memory_region: m4f-memory@9cc00000 {
97 compatible = "shared-dma-pool";
98 reg = <0x00 0x9cc00000 0x00 0xe00000>;
99 no-map;
100 };
101 };
102
103 soc {
104 #address-cells = <2>;
105 #size-cells = <2>;
106
107 mailbox0_cluster0: mailbox-0 {
108 #mbox-cells = <1>;
109 };
110
111 remoteproc@5000000 {
112 compatible = "ti,am64-m4fss";
113 reg = <0x00 0x5000000 0x00 0x30000>,
114 <0x00 0x5040000 0x00 0x10000>;
115 reg-names = "iram", "dram";
116 resets = <&k3_reset 9 1>;
117 firmware-name = "am62-mcu-m4f0_0-fw";
118 mboxes = <&mailbox0_cluster0>, <&mbox_m4_0>;
119 memory-region = <&mcu_m4fss_dma_memory_region>,
120 <&mcu_m4fss_memory_region>;
121 ti,sci = <&dmsc>;
122 ti,sci-dev-id = <9>;
123 ti,sci-proc-ids = <0x18 0xff>;
124 };
125 };
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