netdev - Re: [PATCH v12 1/4] dt-bindings: phy: Add sparx5-serdes bindings

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Date:   Thu, 14 Jan 2021 12:02:14 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Steen Hegelund <steen.hegelund@...rochip.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Device Tree List <devicetree@...r.kernel.org>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Bjarni Jonasson <bjarni.jonasson@...rochip.com>,
        Microchip UNG Driver List <UNGLinuxDriver@...rochip.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh@...nel.org>, Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH v12 1/4] dt-bindings: phy: Add sparx5-serdes bindings

On 07/01/2021 10:19:21+0100, Steen Hegelund wrote:
> Document the Sparx5 ethernet serdes phy driver bindings.
> 
> Signed-off-by: Lars Povlsen <lars.povlsen@...rochip.com>
> Signed-off-by: Steen Hegelund <steen.hegelund@...rochip.com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>
Reviewed-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

> ---
>  .../bindings/phy/microchip,sparx5-serdes.yaml | 100 ++++++++++++++++++
>  1 file changed, 100 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/microchip,sparx5-serdes.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/microchip,sparx5-serdes.yaml b/Documentation/devicetree/bindings/phy/microchip,sparx5-serdes.yaml
> new file mode 100644
> index 000000000000..bdbdb3bbddbe
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/microchip,sparx5-serdes.yaml
> @@ -0,0 +1,100 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/microchip,sparx5-serdes.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip Sparx5 Serdes controller
> +
> +maintainers:
> +  - Steen Hegelund <steen.hegelund@...rochip.com>
> +
> +description: |
> +  The Sparx5 SERDES interfaces share the same basic functionality, but
> +  support different operating modes and line rates.
> +
> +  The following list lists the SERDES features:
> +
> +  * RX Adaptive Decision Feedback Equalizer (DFE)
> +  * Programmable continuous time linear equalizer (CTLE)
> +  * Rx variable gain control
> +  * Rx built-in fault detector (loss-of-lock/loss-of-signal)
> +  * Adjustable tx de-emphasis (FFE)
> +  * Tx output amplitude control
> +  * Supports rx eye monitor
> +  * Multiple loopback modes
> +  * Prbs generator and checker
> +  * Polarity inversion control
> +
> +  SERDES6G:
> +
> +  The SERDES6G is a high-speed SERDES interface, which can operate at
> +  the following data rates:
> +
> +  * 100 Mbps (100BASE-FX)
> +  * 1.25 Gbps (SGMII/1000BASE-X/1000BASE-KX)
> +  * 3.125 Gbps (2.5GBASE-X/2.5GBASE-KX)
> +  * 5.15625 Gbps (5GBASE-KR/5G-USXGMII)
> +
> +  SERDES10G
> +
> +  The SERDES10G is a high-speed SERDES interface, which can operate at
> +  the following data rates:
> +
> +  * 100 Mbps (100BASE-FX)
> +  * 1.25 Gbps (SGMII/1000BASE-X/1000BASE-KX)
> +  * 3.125 Gbps (2.5GBASE-X/2.5GBASE-KX)
> +  * 5 Gbps (QSGMII/USGMII)
> +  * 5.15625 Gbps (5GBASE-KR/5G-USXGMII)
> +  * 10 Gbps (10G-USGMII)
> +  * 10.3125 Gbps (10GBASE-R/10GBASE-KR/USXGMII)
> +
> +  SERDES25G
> +
> +  The SERDES25G is a high-speed SERDES interface, which can operate at
> +  the following data rates:
> +
> +  * 1.25 Gbps (SGMII/1000BASE-X/1000BASE-KX)
> +  * 3.125 Gbps (2.5GBASE-X/2.5GBASE-KX)
> +  * 5 Gbps (QSGMII/USGMII)
> +  * 5.15625 Gbps (5GBASE-KR/5G-USXGMII)
> +  * 10 Gbps (10G-USGMII)
> +  * 10.3125 Gbps (10GBASE-R/10GBASE-KR/USXGMII)
> +  * 25.78125 Gbps (25GBASE-KR/25GBASE-CR/25GBASE-SR/25GBASE-LR/25GBASE-ER)
> +
> +properties:
> +  $nodename:
> +    pattern: "^serdes@[0-9a-f]+$"
> +
> +  compatible:
> +    const: microchip,sparx5-serdes
> +
> +  reg:
> +    minItems: 1
> +
> +  '#phy-cells':
> +    const: 1
> +    description: |
> +      - The main serdes input port
> +
> +  clocks:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - '#phy-cells'
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    serdes: serdes@...08000 {
> +      compatible = "microchip,sparx5-serdes";
> +      #phy-cells = <1>;
> +      clocks = <&sys_clk>;
> +      reg = <0x10808000 0x5d0000>;
> +    };
> +
> +...
> -- 
> 2.29.2
> 

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com