linux-kernel - Re: [PATCH 02/11] dt-bindings: new: add yaml bindings for MediaTek Ethernet MAC

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Date:   Tue, 12 May 2020 21:41:09 -0500
From:   Rob Herring <robh@...nel.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Felix Fietkau <nbd@...nwrt.org>,
        John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Fabien Parent <fparent@...libre.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH 02/11] dt-bindings: new: add yaml bindings for MediaTek
 Ethernet MAC

On Tue, May 05, 2020 at 04:02:22PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> This adds yaml DT bindings for the MediaTek Ethernet MAC present on the
> mt8* family of SoCs.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---
>  .../bindings/net/mediatek,eth-mac.yaml        | 80 +++++++++++++++++++
>  1 file changed, 80 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/mediatek,eth-mac.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/mediatek,eth-mac.yaml b/Documentation/devicetree/bindings/net/mediatek,eth-mac.yaml
> new file mode 100644
> index 000000000000..7682fe9d8109
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/mediatek,eth-mac.yaml
> @@ -0,0 +1,80 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/mediatek,eth-mac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek Ethernet MAC Controller
> +
> +maintainers:
> +  - Bartosz Golaszewski <bgolaszewski@...libre.com>
> +
> +description:
> +  This Ethernet MAC is used on the MT8* family of SoCs from MediaTek.
> +  It's compliant with 802.3 standards and supports half- and full-duplex
> +  modes with flow-control as well as CRC offloading and VLAN tags.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - mediatek,mt8516-eth
> +      - mediatek,mt8518-eth
> +      - mediatek,mt8175-eth
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 3
> +    maxItems: 3
> +
> +  clock-names:
> +    additionalItems: false
> +    items:
> +      - const: core
> +      - const: reg
> +      - const: trans
> +
> +  mediatek,pericfg:
> +    $ref: /schemas/types.yaml#definitions/phandle
> +    description:
> +      Phandle to the device containing the PERICFG register range.

Perhaps say what it is used for?

> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - mediatek,pericfg
> +  - phy-handle
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/mt8516-clk.h>
> +
> +    ethernet: ethernet@...80000 {
> +        compatible = "mediatek,mt8516-eth";
> +        reg = <0 0x11180000 0 0x1000>;

Default addr and size is 1 cell.

> +        mediatek,pericfg = <&pericfg>;
> +        interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_LOW>;
> +        clocks = <&topckgen CLK_TOP_RG_ETH>,
> +                 <&topckgen CLK_TOP_66M_ETH>,
> +                 <&topckgen CLK_TOP_133M_ETH>;
> +        clock-names = "core", "reg", "trans";
> +        phy-handle = <&eth_phy>;
> +        phy-mode = "rmii";
> +
> +        mdio {

Not documented.

> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            eth_phy: ethernet-phy@0 {
> +                reg = <0>;
> +            };
> +        };
> +    };
> -- 
> 2.25.0
>