From: Daniel Baluta <daniel.baluta@xxxxxxx> i.MX8 MPlus SoC integrates Cadence HIFI4 DSP. This core runs either a custom firmware or the open source SOF firmware [1] DSP device is handled by SOF OF driver found in sound/soc/sof/sof-of-dev.c Notice that the DSP node makes use of: - dsp_reserved, a reserved memory region for various Audio resources (e.g firmware loading, audio buffers, etc). - Messaging Unit (mu2) for passing notifications betweem ARM core and DSP. [1] https://thesofproject.github.io/latest/platforms/index.html Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxx> --- arch/arm64/boot/dts/freescale/imx8mp.dtsi | 28 +++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi index 9f7c7f587d38..264ba540f363 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi @@ -135,6 +135,17 @@ clk_ext4: clock-ext4 { clock-output-names = "clk_ext4"; }; + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + + dsp_reserved: dsp@92400000 { + reg = <0 0x92400000 0 0x2000000>; + no-map; + }; + }; + pmu { compatible = "arm,cortex-a53-pmu"; interrupts = <GIC_PPI 7 @@ -698,6 +709,13 @@ mu: mailbox@30aa0000 { #mbox-cells = <2>; }; + mu2: mailbox@30e60000 { + compatible = "fsl,imx8mp-mu", "fsl,imx6sx-mu"; + reg = <0x30e60000 0x10000>; + interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>; + #mbox-cells = <2>; + }; + i2c5: i2c@30ad0000 { compatible = "fsl,imx8mp-i2c", "fsl,imx21-i2c"; #address-cells = <1>; @@ -938,5 +956,15 @@ usb_dwc3_1: usb@38200000 { snps,dis-u2-freeclk-exists-quirk; }; }; + dsp: dsp@3b6e8000 { + compatible = "fsl,imx8mp-dsp"; + reg = <0x3b6e8000 0x88000>; + mbox-names = "txdb0", "txdb1", + "rxdb0", "rxdb1"; + mboxes = <&mu2 2 0>, <&mu2 2 1>, + <&mu2 3 0>, <&mu2 3 1>; + memory-region = <&dsp_reserved>; + status = "disabled"; + }; }; }; -- 2.27.0
