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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dsp/fsl,dsp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX8 DSP core
+
+maintainers:
+ - Daniel Baluta <daniel.baluta@nxp.com>
+ - Shengjiu Wang <shengjiu.wang@nxp.com>
+
+description: |
+ Some boards from i.MX8 family contain a DSP core used for
+ advanced pre- and post- audio processing.
+
+properties:
+ compatible:
+ enum:
+ - fsl,imx8qxp-dsp
+ - fsl,imx8qm-dsp
+ - fsl,imx8mp-dsp
+ - fsl,imx8ulp-dsp
+ - fsl,imx8qxp-hifi4
+ - fsl,imx8qm-hifi4
+ - fsl,imx8mp-hifi4
+ - fsl,imx8ulp-hifi4
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: ipg clock
+ - description: ocram clock
+ - description: core clock
+ - description: debug interface clock
+ - description: message unit clock
+ minItems: 3
+
+ clock-names:
+ items:
+ - const: ipg
+ - const: ocram
+ - const: core
+ - const: debug
+ - const: mu
+ minItems: 3
+
+ power-domains:
+ description:
+ List of phandle and PM domain specifier as documented in
+ Documentation/devicetree/bindings/power/power_domain.txt
+ minItems: 1
+ maxItems: 4
+
+ mboxes:
+ description:
+ List of <&phandle type channel> - 2 channels for TXDB, 2 channels for RXDB
+ or - 1 channel for TX, 1 channel for RX, 1 channel for RXDB
+ (see mailbox/fsl,mu.txt)
+ minItems: 3
+ maxItems: 4
+
+ mbox-names:
+ minItems: 3
+ maxItems: 4
+
+ memory-region:
+ description:
+ phandle to a node describing reserved memory (System RAM memory)
+ used by DSP (see bindings/reserved-memory/reserved-memory.txt)
+ minItems: 1
+ maxItems: 4
+
+ firmware-name:
+ description: |
+ Default name of the firmware to load to the remote processor.
+
+ fsl,dsp-ctrl:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Phandle to syscon block which provide access for processor enablement
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - power-domains
+ - mboxes
+ - mbox-names
+ - memory-region
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - fsl,imx8qxp-dsp
+ - fsl,imx8qm-dsp
+ - fsl,imx8qxp-hifi4
+ - fsl,imx8qm-hifi4
+ then:
+ properties:
+ power-domains:
+ minItems: 4
+ else:
+ properties:
+ power-domains:
+ maxItems: 1
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - fsl,imx8qxp-hifi4
+ - fsl,imx8qm-hifi4
+ - fsl,imx8mp-hifi4
+ - fsl,imx8ulp-hifi4
+ then:
+ properties:
+ memory-region:
+ minItems: 4
+ mboxes:
+ maxItems: 3
+ mbox-names:
+ items:
+ - const: tx
+ - const: rx
+ - const: rxdb
+ else:
+ properties:
+ memory-region:
+ maxItems: 1
+ mboxes:
+ minItems: 4
+ mbox-names:
+ items:
+ - const: txdb0
+ - const: txdb1
+ - const: rxdb0
+ - const: rxdb1
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/firmware/imx/rsrc.h>
+ #include <dt-bindings/clock/imx8-clock.h>
+ dsp@596e8000 {
+ compatible = "fsl,imx8qxp-dsp";
+ reg = <0x596e8000 0x88000>;
+ clocks = <&adma_lpcg IMX_ADMA_LPCG_DSP_IPG_CLK>,
+ <&adma_lpcg IMX_ADMA_LPCG_OCRAM_IPG_CLK>,
+ <&adma_lpcg IMX_ADMA_LPCG_DSP_CORE_CLK>;
+ clock-names = "ipg", "ocram", "core";
+ power-domains = <&pd IMX_SC_R_MU_13A>,
+ <&pd IMX_SC_R_MU_13B>,
+ <&pd IMX_SC_R_DSP>,
+ <&pd IMX_SC_R_DSP_RAM>;
+ mbox-names = "txdb0", "txdb1", "rxdb0", "rxdb1";
+ mboxes = <&lsio_mu13 2 0>, <&lsio_mu13 2 1>, <&lsio_mu13 3 0>, <&lsio_mu13 3 1>;
+ memory-region = <&dsp_reserved>;
+ };
+ - |
+ #include <dt-bindings/clock/imx8mp-clock.h>
+ dsp_reserved: dsp@92400000 {
+ reg = <0x92400000 0x1000000>;
+ no-map;
+ };
+ dsp_vdev0vring0: vdev0vring0@942f0000 {
+ reg = <0x942f0000 0x8000>;
+ no-map;
+ };
+ dsp_vdev0vring1: vdev0vring1@942f8000 {
+ reg = <0x942f8000 0x8000>;
+ no-map;
+ };
+ dsp_vdev0buffer: vdev0buffer@94300000 {
+ compatible = "shared-dma-pool";
+ reg = <0x94300000 0x100000>;
+ no-map;
+ };
+
+ dsp: dsp@3b6e8000 {
+ compatible = "fsl,imx8mp-hifi4";
+ reg = <0x3b6e8000 0x88000>;
+ clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_DSP_ROOT>,
+ <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_OCRAMA_IPG>,
+ <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_DSP_ROOT>,
+ <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_DSPDBG_ROOT>;
+ clock-names = "ipg", "ocram", "core", "debug";
+ firmware-name = "imx/dsp/hifi4.bin";
+ power-domains = <&audiomix_pd>;
+ mbox-names = "tx", "rx", "rxdb";
+ mboxes = <&mu2 0 0>,
+ <&mu2 1 0>,
+ <&mu2 3 0>;
+ memory-region = <&dsp_vdev0buffer>, <&dsp_vdev0vring0>,
+ <&dsp_vdev0vring1>, <&dsp_reserved>;
+ fsl,dsp-ctrl = <&audio_blk_ctrl>;
+ };