netdev - Re: [PATCH net-next v3 1/6] dt-bindings: marvell: Rewrite MV88E6xxx in schema

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Message-ID: <20231016125929.GB2578576-robh@kernel.org>
Date: Mon, 16 Oct 2023 07:59:29 -0500
From: Rob Herring <robh@...nel.org>
To: Vladimir Oltean <olteanv@...il.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Andrew Lunn <andrew@...n.ch>, Gregory Clement <gregory.clement@...tlin.com>, Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Russell King <linux@...linux.org.uk>, Florian Fainelli <f.fainelli@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Christian Marangi <ansuelsmth@...il.com>, linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v3 1/6] dt-bindings: marvell: Rewrite MV88E6xxx
 in schema

On Mon, Oct 16, 2023 at 02:08:58PM +0300, Vladimir Oltean wrote:
> On Mon, Oct 16, 2023 at 11:12:54AM +0200, Linus Walleij wrote:
> > This is an attempt to rewrite the Marvell MV88E6xxx switch bindings
> > in YAML schema.
> > 
> > The current text binding says:
> >   WARNING: This binding is currently unstable. Do not program it into a
> >   FLASH never to be changed again. Once this binding is stable, this
> >   warning will be removed.
> > 
> > Well that never happened before we switched to YAML markup,
> > we can't have it like this, what about fixing the mess?
> 
> Removing that remark seems in order.
> 
> > 
> > Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> > ---
> >  .../bindings/net/dsa/marvell,mv88e6xxx.yaml        | 243 +++++++++++++++++++++
> >  .../devicetree/bindings/net/dsa/marvell.txt        | 109 ---------
> >  MAINTAINERS                                        |   2 +-
> >  3 files changed, 244 insertions(+), 110 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/dsa/marvell,mv88e6xxx.yaml b/Documentation/devicetree/bindings/net/dsa/marvell,mv88e6xxx.yaml
> > new file mode 100644
> > index 000000000000..954db04147f8
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/dsa/marvell,mv88e6xxx.yaml
> > @@ -0,0 +1,243 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/dsa/marvell,mv88e6xxx.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Marvell MV88E6xxx DSA switch family
> > +
> > +maintainers:
> > +  - Andrew Lunn <andrew@...n.ch>
> > +
> > +description:
> > +  The Marvell MV88E6xxx switch series has been produced and sold
> > +  by Marvell since at least 2010. The switch has a few compatibles which
> > +  just indicate the base address of the switch, then operating systems
> > +  can investigate switch ID registers to find out which actual version
> > +  of the switch it is dealing with.
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:
> > +      - enum:
> > +          - marvell,mv88e6085
> > +          - marvell,mv88e6190
> > +          - marvell,mv88e6250
> > +    description: |
> > +      marvell,mv88e6085: This switch uses base address 0x10.
> > +        This switch and its siblings will be autodetected from
> > +        ID registers found in the switch, so only "marvell,mv88e6085" should be
> > +        specified. This includes the following list of MV88Exxxx switches:
> > +        6085, 6095, 6097, 6123, 6131, 6141, 6161, 6165, 6171, 6172, 6175, 6176,
> > +        6185, 6240, 6320, 6321, 6341, 6350, 6351, 6352
> > +      marvell,mv88e6190: This switch uses base address 0x00.
> > +        This switch and its siblings will be autodetected from
> > +        ID registers found in the switch, so only "marvell,mv88e6190" should be
> > +        specified. This includes the following list of MV88Exxxx switches:
> > +        6190, 6190X, 6191, 6290, 6361, 6390, 6390X
> > +      marvell,mv88e6250: This switch uses base address 0x08 or 0x18.
> > +        This switch and its siblings will be autodetected from
> > +        ID registers found in the switch, so only "marvell,mv88e6250" should be
> > +        specified. This includes the following list of MV88Exxxx switches:
> > +        6220, 6250
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  eeprom-length:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description: Set to the length of an EEPROM connected to the switch. Must be
> > +      set if the switch can not detect the presence and/or size of a connected
> > +      EEPROM, otherwise optional.
> > +
> > +  reset-gpios:
> > +    description:
> > +      GPIO to be used to reset the whole device
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    description: The switch provides an external interrupt line, but it is
> > +      not always used by target systems.
> > +    maxItems: 1
> > +
> > +  interrupt-controller:
> > +    description: The switch has an internal interrupt controller used by
> > +      the different sub-blocks.
> > +
> > +  '#interrupt-cells':
> > +    description: The internal interrupt controller only supports triggering
> > +      on active high level interrupts so the second cell must alway be set to
> > +      IRQ_TYPE_LEVEL_HIGH.
> > +    const: 2
> > +
> > +  mdio:
> > +    $ref: /schemas/net/mdio.yaml#
> > +    unevaluatedProperties: false
> > +    description: Marvell MV88E6xxx switches have an varying combination of
> > +    internal and external MDIO buses, in some cases a combined bus that
> > +    can be used both internally and externally. This node is for the
> > +    primary bus, used internally and sometimes also externally.
> > +
> > +  mdio-external:
> > +    $ref: /schemas/net/mdio.yaml#
> > +    unevaluatedProperties: false
> > +    description: Marvell MV88E6xxx switches that have a separate external
> > +      MDIO bus use this port to access external components on the MDIO bus.
> > +
> > +    properties:
> > +      compatible:
> > +        const: marvell,mv88e6xxx-mdio-external
> > +
> > +    required:
> > +      - compatible
> > +
> > +$ref: dsa.yaml#
> > +
> > +patternProperties:
> > +  "^(ethernet-)?ports$":
> > +    type: object
> > +    patternProperties:
> > +      "^(ethernet-)?port@[0-9]+$":
> > +        type: object
> > +        description: Ethernet switch ports
> > +
> > +        $ref: dsa-port.yaml#
> > +
> > +        unevaluatedProperties: false
> > +
> > +oneOf:
> > +  - required:
> > +      - ports
> > +  - required:
> > +      - ethernet-ports
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    mdio {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        switch0: switch@0 {
> 
> ethernet-switch is preferred
> 
> > +            compatible = "marvell,mv88e6085";
> > +            reg = <0>;
> > +            reset-gpios = <&gpio5 1 GPIO_ACTIVE_LOW>;
> > +            interrupt-parent = <&gpio0>;
> 
> I don't see interrupt-parent as an accepted property in the schema.
> Should interrupts-extended also be accepted?

Both are implicitly accepted since 'interrupts' is.

Rob