linux-kernel - Re: [PATCH v2 1/5] dt-bindings: bus: add documentation for the IMX AIPSTZ bridge

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Message-ID: <837c7fd8-68b1-4d95-af3e-2af5dfccb60a@kernel.org>
Date: Wed, 26 Feb 2025 22:16:22 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>, Fabio Estevam <festevam@...il.com>,
 Daniel Baluta <daniel.baluta@....com>, Shengjiu Wang
 <shengjiu.wang@....com>, Frank Li <Frank.li@....com>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] dt-bindings: bus: add documentation for the IMX
 AIPSTZ bridge

On 26/02/2025 17:53, Laurentiu Mihalcea wrote:
> From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> 
> Add documentation for IMX AIPSTZ bridge.
> 

Please use get_maintainers so this will reach proper lists and
automation. Or just start using b4, so you won't remove cc-entries (v1
looked correct).


> Co-developed-by: Daniel Baluta <daniel.baluta@....com>
> Signed-off-by: Daniel Baluta <daniel.baluta@....com>
> Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> ---
>  .../bindings/bus/fsl,imx8mp-aipstz.yaml       | 86 +++++++++++++++++++
>  1 file changed, 86 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml
> 
> diff --git a/Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml b/Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml
> new file mode 100644
> index 000000000000..dfcfe4a8ae74
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml
> @@ -0,0 +1,86 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/bus/fsl,imx8mp-aipstz.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Secure AHB to IP Slave bus (AIPSTZ) bridge
> +
> +description:
> +  The secure AIPS bridge (AIPSTZ) acts as a bridge for AHB masters
> +  issuing transactions to IP Slave peripherals. Additionally, this module
> +  offers access control configurations meant to restrict which peripherals
> +  a master can access.
> +
> +maintainers:
> +  - Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> +
> +properties:
> +  compatible:
> +    const: fsl,imx8mp-aipstz
> +
> +  reg:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    enum: [1, 2]
> +
> +  "#size-cells":
> +    enum: [1, 2]

Why flexible? This is either 32- or 64-bit addressing in the sources,
isn't it?

> +
> +  "#access-controller-cells":
> +    const: 0
> +
> +  ranges: true
> +
> +# borrowed from simple-bus.yaml, no additional requirements for children
> +patternProperties:
> +  "@(0|[1-9a-f][0-9a-f]*)$":
> +    type: object
> +    additionalProperties: true
> +    properties:
> +      reg:
> +        items:
> +          minItems: 2
> +          maxItems: 4
> +        minItems: 1
> +        maxItems: 1024
> +      ranges:
> +        oneOf:
> +          - items:
> +              minItems: 3
> +              maxItems: 7
> +            minItems: 1
> +            maxItems: 1024
> +          - $ref: /schemas/types.yaml#/definitions/flag
> +    anyOf:
> +      - required:
> +          - reg
> +      - required:
> +          - ranges
> +
> +required:
> +  - compatible
> +  - reg
> +  - power-domains
> +  - "#address-cells"
> +  - "#size-cells"
> +  - "#access-controller-cells"
> +  - ranges
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    bus@...f0000 {
> +      compatible = "fsl,imx8mp-aipstz";
> +      reg = <0x30df0000 0x10000>;
> +      power-domains = <&pgc_audio>;
> +      #address-cells = <1>;
> +      #size-cells = <1>;
> +      #access-controller-cells = <0>;
> +      ranges;

Add at least one child, so your pattern will be tested.



Best regards,
Krzysztof