linux-kernel - Re: [PATCH v2] dt-bindings: mediatek: add adsp-mbox document

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Message-ID: <YW3SHDBj2Q1dS8Wp@robh.at.kernel.org>
Date:   Mon, 18 Oct 2021 14:59:24 -0500
From:   Rob Herring <robh@...nel.org>
To:     Allen-KH Cheng <Allen-KH.Cheng@...iatek.com>
Cc:     Jassi Brar <jassisinghbrar@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v2] dt-bindings: mediatek: add adsp-mbox document

On Fri, Oct 08, 2021 at 04:40:30PM +0800, Allen-KH Cheng wrote:
> This patch adds document for mediatek adsp mbox
> 
> Signed-off-by: Allen-KH Cheng <Allen-KH.Cheng@...iatek.com>
> ---
>  .../bindings/mailbox/mtk,adsp-mbox.yaml       | 76 +++++++++++++++++++
>  1 file changed, 76 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml b/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
> new file mode 100644
> index 000000000000..9028e403ceda
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
> @@ -0,0 +1,76 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mailbox/mtk,adsp-mbox.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek ADSP mailbox
> +
> +maintainers:
> +  - Allen-KH Cheng <Allen-KH.Cheng@...iatek.com>
> +
> +description: |
> +  The MTK ADSP mailbox Inter-Processor Communication (IPC) enables the SoC
> +  to ommunicate with ADSP by passing messages through two mailbox channels.
> +  The MTK ADSP mailbox IPC also provides the ability for one processor to
> +  signal the other processor using interrupts.
> +
> +  mbox0 is handling ipc reply
> +  mbox1 is handling ipc request
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: mediatek,mt8195-adsp-mbox
> +
> +  "#mbox-cells":
> +    const: 1
> +
> +  reg:
> +    description: 
> +      Physical address base for dsp mbox base registers.
> +    maxItems: 2
> +    minItems: 2
> +
> +  reg-names:
> +    items:
> +      - const: reg_mbox0 
> +      - const: reg_mbox1

'reg_' is redundant.

> +
> +  interrupts:
> +    description: 
> +      adsp mbox interrupt
> +    maxItems: 2
> +    minItems: 2
> +
> +  interrupt-names:
> +    items:
> +      - const: irq_mbox0 
> +      - const: irq_mbox1

'irq_' is redundant.


Is this really 1 h/w block? Kind of looks like 2 instances of a block.

> +
> +required:
> +  - compatible
> +  - "#mbox-cells"
> +  - reg
> +  - reg-names
> +  - interrupts
> +  - interrupt-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    adsp_mailbox:adsp_mailbox@...16000 {
> +        compatible = "mediatek,mt8195-adsp-mbox";
> +        #mbox-cells = <1>;
> +        reg = <0x10816000 0x1000>,
> +              <0x10817000 0x1000>;
> +        reg-names = "reg_mbox0", "reg_mbox1";
> +        interrupts = <GIC_SPI 702 IRQ_TYPE_LEVEL_HIGH 0>,
> +                     <GIC_SPI 703 IRQ_TYPE_LEVEL_HIGH 0>;
> +        interrupt-names = "irq_mbox0", "irq_mbox1";
> +    };
> +
> -- 
> 2.18.0
> 
>