On Fri, Jul 16, 2021 at 03:47:19PM +0300, Daniel Baluta wrote: > 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> > --- > Changes since v1: > * mark MU2 node as disabled, because mu2 clock support is not yet upstream. > > arch/arm64/boot/dts/freescale/imx8mp.dtsi | 29 +++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi > index 9f7c7f587d38..fb0ac85c8473 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 +709,14 @@ 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>; > + status = "disabled"; > + }; > + > i2c5: i2c@30ad0000 { > compatible = "fsl,imx8mp-i2c", "fsl,imx21-i2c"; > #address-cells = <1>; > @@ -938,5 +957,15 @@ usb_dwc3_1: usb@38200000 { > snps,dis-u2-freeclk-exists-quirk; > }; > }; > + dsp: dsp@3b6e8000 { Please have a newline between nodes. Shawn > + 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 >
