linux-kernel - Re: [PATCH v4 1/7] dt bindings: remoteproc: Add bindings for the MT8183 APU

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Date:   Mon, 7 Mar 2022 17:13:10 -0600
From:   Rob Herring <robh@...nel.org>
To:     Alexandre Bailon <abailon@...libre.com>
Cc:     ohad@...ery.com, bjorn.andersson@...aro.org,
        mathieu.poirier@...aro.org, robh+dt@...nel.or,
        matthias.bgg@...il.com, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stephane.leprovost@...iatek.com, khilman@...libre.com
Subject: Re: [PATCH v4 1/7] dt bindings: remoteproc: Add bindings for the
 MT8183 APU

On Fri, Mar 04, 2022 at 05:15:08PM +0100, Alexandre Bailon wrote:
> This adds dt bindings for the APU present in the MT8183.
> 
> Signed-off-by: Alexandre Bailon <abailon@...libre.com>
> ---
>  .../bindings/remoteproc/mtk,apu.yaml          | 122 ++++++++++++++++++
>  1 file changed, 122 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,apu.yaml
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,apu.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,apu.yaml
> new file mode 100644
> index 000000000000..b640aa96d678
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/mtk,apu.yaml
> @@ -0,0 +1,122 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +
> +---
> +$id: "http://devicetree.org/schemas/remoteproc/mtk,apu.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Mediatek AI Processor Unit (APU)
> +
> +description:
> +  This document defines the binding for the APU, a co-processor that could
> +  offload the CPU for machine learning and neural network.
> +
> +maintainers:
> +  - Alexandre Bailon <abailon@...Libre.com>
> +
> +properties:
> +  compatible:
> +    const: mediatek,mt8183-apu
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 3
> +    maxItems: 3
> +
> +  clock-names:
> +    items:
> +      - const: axi
> +      - const: ipu
> +      - const: jtag
> +
> +  iommus:
> +    maxItems: 3
> +
> +  memory-region:
> +    maxItems: 3
> +
> +  memory-region-da:
> +    description:
> +      Array of APU device address. This is used to map the APU device address
> +      to a physical address.
> +    maxItems: 3

'dma-ranges' should work for this.

> +
> +  power-domains:
> +    maxItems: 1
> +
> +  pinctrl:
> +    description: pinctrl handles, required to configure pins for JTAG.
> +
> +  pinctrl-names:
> +    items:
> +      - const: jtag
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - iommus
> +  - memory-region
> +  - memory-region-da
> +  - power-domains
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mt8183-clk.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/memory/mt8183-larb-port.h>
> +    #include <dt-bindings/power/mt8183-power.h>
> +
> +    reserved-memory {
> +      #address-cells = <1>;
> +      #size-cells = <1>;
> +      ranges;
> +
> +      vdev0buffer: vdev0buffer@...00000 {
> +        compatible = "shared-dma-pool";
> +        reg = <0x52900000 0x4000>;
> +        no-map;
> +      };
> +
> +      vdev0vring0: vdev0vring0@...04000 {
> +        compatible = "shared-dma-pool";
> +        reg = <0x52904000 0x2000>;
> +        no-map;
> +      };
> +
> +      vdev0vring1: vdev0vring1@...06000 {
> +        compatible = "shared-dma-pool";
> +        reg = <0x52906000 0x2000>;
> +        no-map;
> +      };
> +    };
> +
> +    apu0: apu@...00000 {
> +      compatible = "mediatek,mt8183-apu";
> +      reg = <0x19180000 0x14000>;
> +      interrupts = <GIC_SPI 292 IRQ_TYPE_LEVEL_LOW>;
> +
> +      iommus = <&iommu M4U_PORT_IMG_IPUO>,
> +         <&iommu M4U_PORT_IMG_IPU3O>,
> +         <&iommu M4U_PORT_IMG_IPUI>;
> +
> +      clocks = <&ipu_core0 CLK_IPU_CORE0_AXI>,
> +         <&ipu_core0 CLK_IPU_CORE0_IPU>,
> +         <&ipu_core0 CLK_IPU_CORE0_JTAG>;
> +
> +      clock-names = "axi", "ipu", "jtag";
> +
> +      power-domains = <&scpsys MT8183_POWER_DOMAIN_VPU_CORE0>;
> +      memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>;
> +      memory-region-da = <0x6fff8000>, <0x6fffc000>, <0x6fffe000>;
> +    };
> +...
> -- 
> 2.34.1
> 
>