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

[Inochi Amaoto]

On Tue, Oct 22, 2024 at 06:28:06PM +0100, Conor Dooley wrote:
> 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 at 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 at 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?
> 

Only one, there is another 100G dwxgmac instance, but it does not
use this syscon.

> > +    $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.
> 

I think it can apply it unconditionally. I will fix it.

Regards,
Inochi

> > +    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 at 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
> >