Re: [PATCH 2/4] dt-bindings: net: Add support for Sophgo SG2044 dwmac

[Conor Dooley <conor@kernel.org>]

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On Mon, Oct 21, 2024 at 06:36:15PM +0800, Inochi Amaoto wrote:
> The GMAC IP on SG2044 is almost a standard Synopsys DesignWare MAC
> with some extra clock.
> 
> Add necessary compatible string for this device.
> 
> Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
> ---
>  .../devicetree/bindings/net/snps,dwmac.yaml   |   1 +
>  .../bindings/net/sophgo,sg2044-dwmac.yaml     | 145 ++++++++++++++++++
>  2 files changed, 146 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> index 3c4007cb65f8..69f6bb36970b 100644
> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> @@ -99,6 +99,7 @@ properties:
>          - snps,dwmac-5.30a
>          - snps,dwxgmac
>          - snps,dwxgmac-2.10
> +        - sophgo,sg2044-dwmac
>          - starfive,jh7100-dwmac
>          - starfive,jh7110-dwmac
>  
> diff --git a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> new file mode 100644
> index 000000000000..93c41550b0b6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> @@ -0,0 +1,145 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/sophgo,sg2044-dwmac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: StarFive JH7110 DWMAC glue layer
> +
> +maintainers:
> +  - Inochi Amaoto <inochiama@gmail.com>
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - sophgo,sg2044-dwmac
> +  required:
> +    - compatible
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: sophgo,sg2044-dwmac
> +      - const: snps,dwmac-5.30a
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: GMAC main clock
> +      - description: PTP clock
> +      - description: TX clock
> +
> +  clock-names:
> +    items:
> +      - const: stmmaceth
> +      - const: ptp_ref
> +      - const: tx
> +
> +  sophgo,syscon:

How many dwmac instances does the sg2044 have?

> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    items:
> +      - items:
> +          - description: phandle to syscon that configures phy
> +          - description: offset of phy mode register
> +          - description: length of the phy mode register
> +    description:
> +      A phandle to syscon with two arguments that configure phy mode.
> +      The argument one is the offset of phy mode register, the
> +      argument two is the length of phy mode register.
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - interrupts
> +  - interrupt-names
> +  - resets
> +  - reset-names
> +
> +allOf:
> +  - $ref: snps,dwmac.yaml#
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: sophgo,sg2044-dwmac

Why does this have to be applied conditionally? There's only one
compatible in the binding, can't you apply these unconditionally?


Cheers,
Conor.

> +    then:
> +      properties:
> +        interrupts:
> +          minItems: 1
> +          maxItems: 1
> +
> +        interrupt-names:
> +          minItems: 1
> +          maxItems: 1
> +
> +        resets:
> +          maxItems: 1
> +
> +        reset-names:
> +          const: stmmaceth
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    ethernet@30006000 {
> +      compatible = "sophgo,sg2044-dwmac", "snps,dwmac-5.30a";
> +      reg = <0x30006000 0x4000>;
> +      clocks = <&clk 151>, <&clk 152>, <&clk 154>;
> +      clock-names = "stmmaceth", "ptp_ref", "tx";
> +      interrupt-parent = <&intc>;
> +      interrupts = <296 IRQ_TYPE_LEVEL_HIGH>;
> +      interrupt-names = "macirq";
> +      resets = <&rst 30>;
> +      reset-names = "stmmaceth";
> +      snps,multicast-filter-bins = <0>;
> +      snps,perfect-filter-entries = <1>;
> +      snps,aal;
> +      snps,tso;
> +      snps,txpbl = <32>;
> +      snps,rxpbl = <32>;
> +      snps,mtl-rx-config = <&gmac0_mtl_rx_setup>;
> +      snps,mtl-tx-config = <&gmac0_mtl_tx_setup>;
> +      snps,axi-config = <&gmac0_stmmac_axi_setup>;
> +      status = "disabled";
> +
> +      gmac0_mtl_rx_setup: rx-queues-config {
> +        snps,rx-queues-to-use = <8>;
> +        snps,rx-sched-wsp;
> +        queue0 {};
> +        queue1 {};
> +        queue2 {};
> +        queue3 {};
> +        queue4 {};
> +        queue5 {};
> +        queue6 {};
> +        queue7 {};
> +      };
> +
> +      gmac0_mtl_tx_setup: tx-queues-config {
> +        snps,tx-queues-to-use = <8>;
> +        queue0 {};
> +        queue1 {};
> +        queue2 {};
> +        queue3 {};
> +        queue4 {};
> +        queue5 {};
> +        queue6 {};
> +        queue7 {};
> +      };
> +
> +      gmac0_stmmac_axi_setup: stmmac-axi-config {
> +        snps,blen = <16 8 4 0 0 0 0>;
> +        snps,wr_osr_lmt = <1>;
> +        snps,rd_osr_lmt = <2>;
> +      };
> +    };
> -- 
> 2.47.0
> 

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