Message-ID: <20250401123507.2e3bf0a6@wsk>
Date: Tue, 1 Apr 2025 12:35:07 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Rob Herring <robh@...nel.org>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, davem@...emloft.net, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer
 <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, Richard Cochran
 <richardcochran@...il.com>, netdev@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 1/4] dt-bindings: net: Add MTIP L2 switch description

Hi Rob,

> On Mon, Mar 31, 2025 at 12:31:13PM +0200, Lukasz Majewski wrote:
> > This patch provides description of the MTIP L2 switch available in
> > some NXP's SOCs - e.g. imx287.
> > 
> > Signed-off-by: Lukasz Majewski <lukma@...x.de>
> > ---
> > Changes for v2:
> > - Rename the file to match exactly the compatible
> >   (nxp,imx287-mtip-switch)
> > 
> > Changes for v3:
> > - Remove '-' from const:'nxp,imx287-mtip-switch'
> > - Use '^port@[12]+$' for port patternProperties
> > - Drop status = "okay";
> > - Provide proper indentation for 'example' binding (replace 8
> >   spaces with 4 spaces)
> > - Remove smsc,disable-energy-detect; property
> > - Remove interrupt-parent and interrupts properties as not required
> > - Remove #address-cells and #size-cells from required properties
> > check
> > - remove description from reg:
> > - Add $ref: ethernet-switch.yaml#
> > ---
> >  .../bindings/net/nxp,imx287-mtip-switch.yaml  | 154
> > ++++++++++++++++++ 1 file changed, 154 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/net/nxp,imx287-mtip-switch.yaml
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/net/nxp,imx287-mtip-switch.yaml
> > b/Documentation/devicetree/bindings/net/nxp,imx287-mtip-switch.yaml
> > new file mode 100644 index 000000000000..98eba3665f32 --- /dev/null
> > +++
> > b/Documentation/devicetree/bindings/net/nxp,imx287-mtip-switch.yaml
> > @@ -0,0 +1,154 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR
> > BSD-2-Clause) +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/nxp,imx287-mtip-switch.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: NXP SoC Ethernet Switch Controller (L2 MoreThanIP switch)
> > +
> > +maintainers:
> > +  - Lukasz Majewski <lukma@...x.de>
> > +
> > +description:
> > +  The 2-port switch ethernet subsystem provides ethernet packet
> > (L2)
> > +  communication and can be configured as an ethernet switch. It
> > provides the
> > +  reduced media independent interface (RMII), the management data
> > input
> > +  output (MDIO) for physical layer device (PHY) management.
> > +
> > +$ref: ethernet-switch.yaml#  
> 
> This needs to be: ethernet-switch.yaml#/$defs/ethernet-ports
> 
> With that, you can drop much of the below part. More below...
> 
> > +
> > +properties:

So it shall be after the "properties:"

$ref: ethernet-switch.yaml#/$defs/ethernet-ports   [*]


> > +  compatible:
> > +    const: nxp,imx287-mtip-switch
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  phy-supply:
> > +    description:
> > +      Regulator that powers Ethernet PHYs.
> > +
> > +  clocks:
> > +    items:
> > +      - description: Register accessing clock
> > +      - description: Bus access clock
> > +      - description: Output clock for external device - e.g. PHY
> > source clock
> > +      - description: IEEE1588 timer clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: ipg
> > +      - const: ahb
> > +      - const: enet_out
> > +      - const: ptp
> > +
> > +  interrupts:
> > +    items:
> > +      - description: Switch interrupt
> > +      - description: ENET0 interrupt
> > +      - description: ENET1 interrupt
> > +
> > +  pinctrl-names: true
> > +  
> 
> > +  ethernet-ports:

And then this "node" can be removed as it has been referenced above [*]?

(I shall only keep the properties, which are not standard to [*] if
any).

> > +    type: object
> > +    additionalProperties: false
> > +
> > +    properties:
> > +      '#address-cells':
> > +        const: 1
> > +      '#size-cells':
> > +        const: 0
> > +
> > +    patternProperties:
> > +      '^port@[12]+$':  
> 
> Note that 'ethernet-port' is the preferred node name though 'port' is 
> allowed.

Ok. That would be the correct define:

ethernet-ports {
     mtip_port1: ethernet-port@1 {
               reg = <1>;
               label = "lan0";
               local-mac-address = [ 00 00 00 00 00 00 ];
               phy-mode = "rmii";
               phy-handle = <&ethphy0>;
	       };

               mtip_port2: port@2 {
		....
	       };

> 
> > +        type: object
> > +        description: MTIP L2 switch external ports
> > +
> > +        $ref: ethernet-controller.yaml#
> > +        unevaluatedProperties: false
> > +
> > +        properties:
> > +          reg:
> > +            items:
> > +              - enum: [1, 2]
> > +            description: MTIP L2 switch port number
> > +
> > +          label:
> > +            description: Label associated with this port
> > +
> > +        required:
> > +          - reg
> > +          - label
> > +          - phy-mode
> > +          - phy-handle  
> 
> All the above under 'ethernet-ports' can be dropped though you might 
> want to keep 'required' part.

Ok, I will keep it.

> 
> > +
> > +  mdio:
> > +    type: object
> > +    $ref: mdio.yaml#
> > +    unevaluatedProperties: false
> > +    description:
> > +      Specifies the mdio bus in the switch, used as a container
> > for phy nodes. +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - clock-names
> > +  - interrupts
> > +  - mdio
> > +  - ethernet-ports
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include<dt-bindings/interrupt-controller/irq.h>
> > +    switch@...f0000 {
> > +        compatible = "nxp,imx287-mtip-switch";
> > +        reg = <0x800f0000 0x20000>;
> > +        pinctrl-names = "default";
> > +        pinctrl-0 = <&mac0_pins_a>, <&mac1_pins_a>;
> > +        phy-supply = <&reg_fec_3v3>;
> > +        interrupts = <100>, <101>, <102>;
> > +        clocks = <&clks 57>, <&clks 57>, <&clks 64>, <&clks 35>;
> > +        clock-names = "ipg", "ahb", "enet_out", "ptp";
> > +
> > +        ethernet-ports {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +
> > +            mtip_port1: port@1 {
> > +                reg = <1>;
> > +                label = "lan0";
> > +                local-mac-address = [ 00 00 00 00 00 00 ];
> > +                phy-mode = "rmii";
> > +                phy-handle = <&ethphy0>;
> > +            };
> > +
> > +            mtip_port2: port@2 {
> > +                reg = <2>;
> > +                label = "lan1";
> > +                local-mac-address = [ 00 00 00 00 00 00 ];
> > +                phy-mode = "rmii";
> > +                phy-handle = <&ethphy1>;
> > +            };
> > +        };
> > +
> > +        mdio_sw: mdio {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +
> > +            reset-gpios = <&gpio2 13 0>;
> > +            reset-delay-us = <25000>;
> > +            reset-post-delay-us = <10000>;
> > +
> > +            ethphy0: ethernet-phy@0 {
> > +                reg = <0>;
> > +            };
> > +
> > +            ethphy1: ethernet-phy@1 {
> > +                reg = <1>;
> > +            };
> > +        };
> > +    };
> > -- 
> > 2.39.5
> >   

Thanks for the hint.


Best regards,

Lukasz Majewski

--

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