Re: [PATCH v2 3/4] dt-bindings: net: qcom,ethqos: Convert bindings to yaml

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

On 29/09/2022 08:04, Bhupesh Sharma wrote:
> Convert Qualcomm ETHQOS Ethernet devicetree binding to YAML.
> 
> While at it, also add Qualcomm Ethernet ETHQOS compatible checks
> in snps,dwmac YAML binding document.

There are no checks added to snps,dwmac.

> 
> Cc: Bjorn Andersson <andersson@kernel.org>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Vinod Koul <vkoul@kernel.org>
> Cc: David Miller <davem@davemloft.net>
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
> ---
>  .../devicetree/bindings/net/qcom,ethqos.txt   |  66 --------
>  .../devicetree/bindings/net/qcom,ethqos.yaml  | 145 ++++++++++++++++++
>  2 files changed, 145 insertions(+), 66 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/net/qcom,ethqos.txt
>  create mode 100644 Documentation/devicetree/bindings/net/qcom,ethqos.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/qcom,ethqos.txt b/Documentation/devicetree/bindings/net/qcom,ethqos.txt
> deleted file mode 100644
> index 1f5746849a71..000000000000
> --- a/Documentation/devicetree/bindings/net/qcom,ethqos.txt
> +++ /dev/null
> @@ -1,66 +0,0 @@
> -Qualcomm Ethernet ETHQOS device
> -
> -This documents dwmmac based ethernet device which supports Gigabit
> -ethernet for version v2.3.0 onwards.
> -
> -This device has following properties:
> -
> -Required properties:
> -
> -- compatible: Should be one of:
> -		"qcom,qcs404-ethqos"
> -		"qcom,sm8150-ethqos"
> -
> -- reg: Address and length of the register set for the device
> -
> -- reg-names: Should contain register names "stmmaceth", "rgmii"
> -
> -- clocks: Should contain phandle to clocks
> -
> -- clock-names: Should contain clock names "stmmaceth", "pclk",
> -		"ptp_ref", "rgmii"
> -
> -- interrupts: Should contain phandle to interrupts
> -
> -- interrupt-names: Should contain interrupt names "macirq", "eth_lpi"
> -
> -Rest of the properties are defined in stmmac.txt file in same directory
> -
> -
> -Example:
> -
> -ethernet: ethernet@7a80000 {
> -	compatible = "qcom,qcs404-ethqos";
> -	reg = <0x07a80000 0x10000>,
> -		<0x07a96000 0x100>;
> -	reg-names = "stmmaceth", "rgmii";
> -	clock-names = "stmmaceth", "pclk", "ptp_ref", "rgmii";
> -	clocks = <&gcc GCC_ETH_AXI_CLK>,
> -		<&gcc GCC_ETH_SLAVE_AHB_CLK>,
> -		<&gcc GCC_ETH_PTP_CLK>,
> -		<&gcc GCC_ETH_RGMII_CLK>;
> -	interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>,
> -			<GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>;
> -	interrupt-names = "macirq", "eth_lpi";
> -	snps,reset-gpio = <&tlmm 60 GPIO_ACTIVE_LOW>;
> -	snps,reset-active-low;
> -
> -	snps,txpbl = <8>;
> -	snps,rxpbl = <2>;
> -	snps,aal;
> -	snps,tso;
> -
> -	phy-handle = <&phy1>;
> -	phy-mode = "rgmii";
> -
> -	mdio {
> -		#address-cells = <0x1>;
> -		#size-cells = <0x0>;
> -		compatible = "snps,dwmac-mdio";
> -		phy1: phy@4 {
> -			device_type = "ethernet-phy";
> -			reg = <0x4>;
> -		};
> -	};
> -
> -};
> diff --git a/Documentation/devicetree/bindings/net/qcom,ethqos.yaml b/Documentation/devicetree/bindings/net/qcom,ethqos.yaml
> new file mode 100644
> index 000000000000..d3d8f6799d18
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/qcom,ethqos.yaml
> @@ -0,0 +1,145 @@
> +# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/qcom,ethqos.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Ethernet ETHQOS device
> +
> +maintainers:
> +  - Bhupesh Sharma <bhupesh.sharma@linaro.org>
> +
> +description:
> +  This binding describes the dwmmac based Qualcomm ethernet devices which
> +  support Gigabit ethernet (version v2.3.0 onwards).
> +
> +  So, this file documents platform glue layer for dwmmac stmmac based Qualcomm
> +  ethernet devices.
> +
> +allOf:
> +  - $ref: snps,dwmac.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,qcs404-ethqos
> +      - qcom,sm8150-ethqos
> +
> +  reg:
> +    maxItems: 2
> +
> +  reg-names:
> +    items:
> +      - const: stmmaceth
> +      - const: rgmii
> +
> +  interrupts:
> +    items:
> +      - description: Combined signal for various interrupt events
> +      - description: The interrupt that occurs when Rx exits the LPI state
> +
> +  interrupt-names:
> +    items:
> +      - const: macirq
> +      - const: eth_lpi
> +
> +  clocks:
> +    maxItems: 4
> +
> +  clock-names:
> +    items:
> +      - const: stmmaceth
> +      - const: pclk
> +      - const: ptp_ref
> +      - const: rgmii
> +
> +  iommus:
> +    maxItems: 1
> +
> +  mdio:
> +    $ref: mdio.yaml#
> +    unevaluatedProperties: false
> +
> +    properties:
> +      compatible:
> +        const: snps,dwmac-mdio
> +
> +  phy-handle:
> +    maxItems: 1
> +
> +  phy-mode:
> +    maxItems: 1
> +
> +  snps,reset-gpio:
> +    maxItems: 1

Why is this one here? It's already in snps,dwmac.

Actually this applies to several other properties. You have
unevaluatedProperties:false, so you do not have to duplicate snps,dwmac.
You only need to constrain it, like we said about interrupts in your
previous patch.

> +
> +  power-domains:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  rx-fifo-depth:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +
> +  tx-fifo-depth:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +
> +  snps,tso:
> +    type: boolean
> +    description: Enables the TSO feature (otherwise managed by MAC HW capability register).

You add here several new properties. Mention in commit msg changes from
pure conversion with answer to "why".

> +
> +required:
> +  - compatible
> +  - clocks
> +  - clock-names
> +
> +unevaluatedProperties: false
> +

Best regards,
Krzysztof