Re: [PATCH v3 1/4] dt-bindings: connector: Add fsl,aud-io-slot binding

[Frank Li <Frank.li@oss.nxp.com>]

On Tue, Nov 03, 2026 at 04:04:30PM +0900, Chancel Liu wrote:
> From: Chancel Liu <chancel.liu@nxp.com>
>
> The NXP AUD-IO slot represents a physically present I/O connector on
> the base board. It acts as a nexus that exposes a constrained set of
> I/O resources, such as GPIOs, clocks and interrupts, through fixed
> electrical wiring. All actual hardware providers reside on the base
> board. The connector node only defines index-based mappings to those
> providers.
>
> This connector type is present on i.MX95 19x19 EVK and i.MX952 EVK,
> where it is used to attach the IMX-AUD-IO audio expansion card[1]. The
> same add-on board can be reused across different base boards that carry
> this connector.
>
> [1]https://www.nxp.com/part/IMX-AUD-IO
>
> Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
> ---
>  .../bindings/connector/fsl,aud-io-slot.yaml   | 106 ++++++++++++++++++
>  1 file changed, 106 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/connector/fsl,aud-io-slot.yaml
>
> diff --git a/Documentation/devicetree/bindings/connector/fsl,aud-io-slot.yaml b/Documentation/devicetree/bindings/connector/fsl,aud-io-slot.yaml
> new file mode 100644
> index 000000000000..fc3896d0fafa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/connector/fsl,aud-io-slot.yaml
> @@ -0,0 +1,106 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/connector/fsl,aud-io-slot.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP AUD-IO Slot
> +
> +maintainers:
> +  - Frank Li <Frank.Li@nxp.com>
> +  - Chancel Liu <chancel.liu@nxp.com>
> +
> +description:
> +  The NXP AUD-IO slot represents a physically present I/O connector on
> +  the base board. It acts as a nexus that exposes a constrained set of
> +  I/O resources, such as GPIOs, clocks and interrupts, through fixed
> +  electrical wiring. All actual hardware providers reside on the base
> +  board. The connector node only defines index-based mappings to those
> +  providers. This connector type is present on i.MX95 19x19 EVK and
> +  i.MX952 EVK, where it is used to attach the IMX-AUD-IO expansion card.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - enum:
> +              - fsl,imx952-evk-aud-io
> +          - const: fsl,imx95-19x19-evk-aud-io
> +      - const: fsl,imx95-19x19-evk-aud-io
> +
> +  gpio-controller: true

I remember Rob said needn't gpio-controller if gpio-map exist

> +
> +  '#gpio-cells':
> +    const: 2
> +
> +  gpio-map:
> +    minItems: 1
> +    maxItems: 3
> +
> +  gpio-map-mask:
> +    items:
> +      - const: 0xf
> +      - const: 0x0
> +
> +  gpio-map-pass-thru:
> +    items:
> +      - const: 0x0
> +      - const: 0x1

I think you should pass thru whole u32 0xffffffff in case GPIO add
new flags in future.

> +
> +  '#clock-cells':
> +    const: 1
> +
> +  clock-map:
> +    minItems: 1
> +    maxItems: 2
> +
> +  '#address-cells':
> +    const: 0

There are not child node, why need #address-cells?

> +
> +  interrupt-controller: true
> +
> +  '#interrupt-cells':
> +    const: 2
> +
> +  interrupt-map:
> +    minItems: 1
> +    maxItems: 2
> +
> +  interrupt-map-mask:
> +    items:
> +      - const: 0xf
> +      - const: 0x0
> +
> +allOf:
> +  - $ref: /schemas/gpio/gpio-nexus-node.yaml#
> +  - $ref: /schemas/clock/clock-nexus-node.yaml#
> +
> +required:
> +  - compatible
> +  - gpio-controller
> +  - '#gpio-cells'
> +  - gpio-map
> +  - gpio-map-mask
> +  - gpio-map-pass-thru
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    connector {
> +      compatible = "fsl,imx95-19x19-evk-aud-io";
> +      gpio-controller;
> +      #gpio-cells = <2>;
> +      gpio-map = <0 0 &gpio1 8 1>;
> +      gpio-map-mask = <0xf 0x0>;
> +      gpio-map-pass-thru = <0x0 0x1>;
> +      #clock-cells = <1>;
> +      clock-map = <0 &clk 1>;
> +      #address-cells = <0>;
> +      interrupt-controller;
> +      #interrupt-cells = <2>;
> +      interrupt-map-mask = <0xf 0x0>;
> +      interrupt-map = <0 0 &gpio2 27 IRQ_TYPE_LEVEL_LOW>;
                                                          ^  missed count?

Frank

> +    };
> --
> 2.50.1
>
>