tjh.dev
Linux kernel mirror (for testing)
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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 description: Should contain register location and length
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 };