netdev - Re: [PATCH net-next 1/6] dt-bindings: net: Brcm ASP 2.0 Ethernet controller

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Date:   Mon, 24 Apr 2023 11:16:51 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Justin Chen <justinpopo6@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org,
        bcm-kernel-feedback-list@...adcom.com, justin.chen@...adcom.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, opendmb@...il.com,
        andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        richardcochran@...il.com, sumit.semwal@...aro.org,
        christian.koenig@....com
Subject: Re: [PATCH net-next 1/6] dt-bindings: net: Brcm ASP 2.0 Ethernet
 controller

On 4/24/23 11:14, Justin Chen wrote:
> On Fri, Apr 21, 2023 at 12:29 AM Krzysztof Kozlowski
> <krzysztof.kozlowski@...aro.org> wrote:
>>
>> On 19/04/2023 02:10, Justin Chen wrote:
>>> From: Florian Fainelli <f.fainelli@...il.com>
>>>
>>> Add a binding document for the Broadcom ASP 2.0 Ethernet
>>> controller.
>>>
>>> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
>>> Signed-off-by: Justin Chen <justinpopo6@...il.com>
>>> ---
>>>   .../devicetree/bindings/net/brcm,asp-v2.0.yaml     | 146 +++++++++++++++++++++
>>>   1 file changed, 146 insertions(+)
>>>   create mode 100644 Documentation/devicetree/bindings/net/brcm,asp-v2.0.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/net/brcm,asp-v2.0.yaml b/Documentation/devicetree/bindings/net/brcm,asp-v2.0.yaml
>>> new file mode 100644
>>> index 000000000000..3817d722244f
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/net/brcm,asp-v2.0.yaml
>>> @@ -0,0 +1,146 @@
>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: "http://devicetree.org/schemas/net/brcm,asp-v2.0.yaml#"
>>> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
>>
>> Drop quotes.
>>
>>> +
>>> +title: Broadcom ASP 2.0 Ethernet controller
>>> +
>>> +maintainers:
>>> +  - Justin Chen <justinpopo6@...il.com>
>>> +  - Florian Fainelli <f.fainelli@...il.com>
>>> +
>>> +description: Broadcom Ethernet controller first introduced with 72165
>>> +
>>> +properties:
>>> +  '#address-cells':
>>> +    const: 1
>>> +  '#size-cells':
>>> +    const: 1
>>> +
>>> +  compatible:
>>> +    enum:
>>> +      - brcm,bcm72165-asp-v2.0
>>> +      - brcm,asp-v2.0
>>> +      - brcm,asp-v2.1
>>
>> Is this part of SoC? If so, then SoC compatibles are preferred, not IP
>> block versions.
> We have the same IP on different chips. So no, it isn't tied to a specific SoC.
> 
>>
>>> +
>>> +  reg:
>>> +    maxItems: 1
>>> +    description: ASP registers
>>
>> Drop description.
>>
>>> +
>>> +  ranges: true
>>> +
>>> +  interrupts:
>>> +    minItems: 1
>>> +    items:
>>> +      - description: RX/TX interrupt
>>> +      - description: Port 0 Wake-on-LAN
>>> +      - description: Port 1 Wake-on-LAN
>>> +
>>> +  clocks:
>>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>>
>> Drop.
>>
>>> +    description: Phandle to clock controller
>>
>> Drop.
>>
>> Instead maxItems.
>>
>>> +
>>> +  clock-names:
>>> +    const: sw_asp
>>
>> Drop entire property.
>>
>>> +
>>> +  ethernet-ports:
>>> +    type: object
>>> +    properties:
>>> +      '#address-cells':
>>> +        const: 1
>>> +      '#size-cells':
>>> +        const: 0
>>
>> Missing additionalProperties:false. Look at existing bindings how it is
>> done.
>>
>>> +
>>> +    patternProperties:
>>> +      "^port@[0-9]+$":
>>> +        type: object
>>> +
>>> +        $ref: ethernet-controller.yaml#
>>> +
>>> +        properties:
>>> +          reg:
>>> +            maxItems: 1
>>> +            description: Port number
>>> +
>>> +          channel:
>>> +            maxItems: 1
>>> +            description: ASP channel number
>>> +
>>> +        required:
>>> +          - reg
>>> +          - channel
>>> +
>>> +patternProperties:
>>> +  "^mdio@[0-9a-f]+$":
>>> +    type: object
>>> +    $ref: "brcm,unimac-mdio.yaml"
>>> +
>>> +    description:
>>> +      ASP internal UniMAC MDIO bus
>>> +
>>> +required:
>>> +  - compatible
>>> +  - reg
>>> +  - interrupts
>>> +  - clocks
>>> +  - clock-names
>>> +  - ranges
>>> +
>>> +additionalProperties: false
>>> +
>>> +examples:
>>> +  - |
>>> +    asp@...0000 {
>>
>> Node names should be generic.
>> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
>>
>>> +        compatible = "brcm,asp-v2.0";
>>> +        reg = <0x9c00000 0x1fff14>;
>>> +        interrupts = <0x0 0x33 0x4>;
>>
>> Use proper defines for flags.
> Not understanding this comment. Can you elaborate?

I believe Krzysztof would prefer that you use:

	interrupts = <GIC_SPI 0x33 IRQ_TYPE_LEVEL_HIGH>

here, which would require using defined from 
include/dt-bindings/interrupt-controller/{arm-gic.h,irq.h}
-- 
Florian