Re: [PATCH v3 1/2] dt-bindings: net: Add ICSSG Ethernet Driver bindings

[Krzysztof Kozlowski]

On 23/12/2022 12:09, MD Danish Anwar wrote:
> From: Puranjay Mohan <p-mohan@xxxxxx>
> 
> Add a YAML binding document for the ICSSG Programmable real time unit
> based Ethernet driver. This driver uses the PRU and PRUSS consumer APIs
> to interface the PRUs and load/run the firmware for supporting ethernet
> functionality.
> 
> Signed-off-by: Puranjay Mohan <p-mohan@xxxxxx>
> Signed-off-by: Md Danish Anwar <danishanwar@xxxxxx>
> ---
>  .../bindings/net/ti,icssg-prueth.yaml         | 174 ++++++++++++++++++
>  1 file changed, 174 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml b/Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml
> new file mode 100644
> index 000000000000..7659f5fd3132
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml
> @@ -0,0 +1,174 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/ti,icssg-prueth.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title:
> +  Texas Instruments ICSSG PRUSS Ethernet

Keep it in one line.

> +
> +maintainers:
> +  - Puranjay Mohan <p-mohan@xxxxxx>
> +  - Md Danish Anwar <danishanwar@xxxxxx>
> +
> +description:
> +  Ethernet based on the Programmable Real-Time
> +  Unit and Industrial Communication Subsystem.
> +
> +allOf:
> +  - $ref: /schemas/remoteproc/ti,pru-consumer.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - ti,am654-icssg-prueth  # for AM65x SoC family
> +
> +  sram:
> +    description:
> +      phandle to MSMC SRAM node

Where does the definition of this come from? If from nowhere, usually
you need vendor prefix and type/ref.

> +
> +  dmas:
> +    maxItems: 10
> +
> +  dma-names:
> +    items:
> +      - const: tx0-0
> +      - const: tx0-1
> +      - const: tx0-2
> +      - const: tx0-3
> +      - const: tx1-0
> +      - const: tx1-1
> +      - const: tx1-2
> +      - const: tx1-3
> +      - const: rx0
> +      - const: rx1
> +
> +  ethernet-ports:
> +    type: object
> +    properties:
> +      '#address-cells':
> +        const: 1
> +      '#size-cells':
> +        const: 0
> +
> +    patternProperties:
> +      ^port@[0-1]$:
> +        type: object
> +        description: ICSSG PRUETH external ports
> +
> +        $ref: ethernet-controller.yaml#
> +
> +        unevaluatedProperties: false
> +        additionalProperties: false

You cannot have both. Did you test the binding? I doubt it...

> +        properties:
> +          reg:
> +            items:
> +              - enum: [0, 1]
> +            description: ICSSG PRUETH port number
> +
> +          ti,syscon-rgmii-delay:
> +            $ref: /schemas/types.yaml#/definitions/phandle-array
> +            description:
> +              phandle to system controller node and register offset
> +              to ICSSG control register for RGMII transmit delay

You need to describe the items. And in your own bindings from TI you
will even find example...

> +
> +        required:
> +          - reg
> +
> +  ti,mii-g-rt:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: |
> +      phandle to MII_G_RT module's syscon regmap.
> +
> +  ti,mii-rt:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: |
> +      phandle to MII_RT module's syscon regmap

Why do you have so many phandles? Aren't you missing some phys?

> +
> +  interrupts:
> +    minItems: 2

Drop minItems

> +    maxItems: 2
> +    description: |
> +      Interrupt specifiers to TX timestamp IRQ.
> +
> +  interrupt-names:
> +    items:
> +      - const: tx_ts0
> +      - const: tx_ts1
> +
> +required:
> +  - compatible
> +  - sram
> +  - ti,mii-g-rt

Keep same order as in properties:.

> +  - dmas
> +  - dma-names
> +  - ethernet-ports
> +  - interrupts
> +  - interrupt-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +

No need for blank line.

> +    /* Example k3-am654 base board SR2.0, dual-emac */
> +    pruss2_eth: pruss2_eth {

No underscores in node names.

Node names should be generic.
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

> +        compatible = "ti,am654-icssg-prueth";
> +        pinctrl-names = "default";
> +        pinctrl-0 = <&icssg2_rgmii_pins_default>;
> +        sram = <&msmc_ram>;
> +
> +        ti,prus = <&pru2_0>, <&rtu2_0>, <&tx_pru2_0>,
> +                  <&pru2_1>, <&rtu2_1>, <&tx_pru2_1>;
> +        firmware-name = "ti-pruss/am65x-pru0-prueth-fw.elf",
> +                        "ti-pruss/am65x-rtu0-prueth-fw.elf",
> +                        "ti-pruss/am65x-txpru0-prueth-fw.elf",
> +                        "ti-pruss/am65x-pru1-prueth-fw.elf",
> +                        "ti-pruss/am65x-rtu1-prueth-fw.elf",
> +                        "ti-pruss/am65x-txpru1-prueth-fw.elf";

I really doubt it was tested... and maybe there will be no testing from
Rob's bot due to dependency.

Please post dt_binding_check testing results.

Best regards,
Krzysztof