1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/dsp/fsl,dsp.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NXP i.MX8 DSP core
8
9maintainers:
10  - Daniel Baluta <daniel.baluta@nxp.com>
11
12description: |
13  Some boards from i.MX8 family contain a DSP core used for
14  advanced pre- and post- audio processing.
15
16properties:
17  compatible:
18    enum:
19      - fsl,imx8qxp-dsp
20      - fsl,imx8qm-dsp
21      - fsl,imx8mp-dsp
22
23  reg:
24    maxItems: 1
25
26  clocks:
27    items:
28      - description: ipg clock
29      - description: ocram clock
30      - description: core clock
31
32  clock-names:
33    items:
34      - const: ipg
35      - const: ocram
36      - const: core
37
38  power-domains:
39    description:
40      List of phandle and PM domain specifier as documented in
41      Documentation/devicetree/bindings/power/power_domain.txt
42    maxItems: 4
43
44  mboxes:
45    description:
46      List of <&phandle type channel> - 2 channels for TXDB, 2 channels for RXDB
47      (see mailbox/fsl,mu.txt)
48    maxItems: 4
49
50  mbox-names:
51    items:
52      - const: txdb0
53      - const: txdb1
54      - const: rxdb0
55      - const: rxdb1
56
57  memory-region:
58    description:
59      phandle to a node describing reserved memory (System RAM memory)
60      used by DSP (see bindings/reserved-memory/reserved-memory.txt)
61    maxItems: 1
62
63required:
64  - compatible
65  - reg
66  - clocks
67  - clock-names
68  - power-domains
69  - mboxes
70  - mbox-names
71  - memory-region
72
73additionalProperties: false
74
75examples:
76  - |
77    #include <dt-bindings/firmware/imx/rsrc.h>
78    #include <dt-bindings/clock/imx8-clock.h>
79    dsp@596e8000 {
80        compatible = "fsl,imx8qxp-dsp";
81        reg = <0x596e8000 0x88000>;
82        clocks = <&adma_lpcg IMX_ADMA_LPCG_DSP_IPG_CLK>,
83                 <&adma_lpcg IMX_ADMA_LPCG_OCRAM_IPG_CLK>,
84                 <&adma_lpcg IMX_ADMA_LPCG_DSP_CORE_CLK>;
85        clock-names = "ipg", "ocram", "core";
86        power-domains = <&pd IMX_SC_R_MU_13A>,
87                        <&pd IMX_SC_R_MU_13B>,
88                        <&pd IMX_SC_R_DSP>,
89                        <&pd IMX_SC_R_DSP_RAM>;
90        mbox-names = "txdb0", "txdb1", "rxdb0", "rxdb1";
91        mboxes = <&lsio_mu13 2 0>, <&lsio_mu13 2 1>, <&lsio_mu13 3 0>, <&lsio_mu13 3 1>;
92        memory-region = <&dsp_reserved>;
93    };
94