[PATCH net-next] dt-bindings: net: Add support for Sophgo CV1800 dwmac

* [PATCH net-next] dt-bindings: net: Add support for Sophgo CV1800 dwmac
@ 2025-07-03  2:12 Inochi Amaoto
  2025-07-10  1:35 ` patchwork-bot+netdevbpf
  0 siblings, 1 reply; 2+ messages in thread
From: Inochi Amaoto @ 2025-07-03  2:12 UTC (permalink / raw)
  To: Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
	Paolo Abeni, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
	Chen Wang, Inochi Amaoto, Richard Cochran, Paul Walmsley,
	Palmer Dabbelt, Albert Ou, Alexandre Ghiti
  Cc: netdev, devicetree, sophgo, linux-kernel, linux-riscv, Yixun Lan,
	Longbin Li, Conor Dooley

The GMAC IP on CV1800 series SoC is a standard Synopsys
DesignWare MAC (version 3.70a).

Add necessary compatible string for this device.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
The binding patch is split from the origianl series
"[PATCH net-next RFC v4 0/4] riscv: dts: sophgo: Add ethernet support
for cv18xx".

Change from origianl RFC v4:
- https://lore.kernel.org/all/20250701011730.136002-1-inochiama@gmail.com
2. remove status, add "phy-handle" and "phy-mode" for binding test.
---
 .../bindings/net/sophgo,cv1800b-dwmac.yaml    | 114 ++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml

diff --git a/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
new file mode 100644
index 000000000000..b89456f0ef83
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
@@ -0,0 +1,114 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/sophgo,cv1800b-dwmac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo CV1800B DWMAC glue layer
+
+maintainers:
+  - Inochi Amaoto <inochiama@gmail.com>
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - sophgo,cv1800b-dwmac
+  required:
+    - compatible
+
+properties:
+  compatible:
+    items:
+      - const: sophgo,cv1800b-dwmac
+      - const: snps,dwmac-3.70a
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: GMAC main clock
+      - description: PTP clock
+
+  clock-names:
+    items:
+      - const: stmmaceth
+      - const: ptp_ref
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: stmmaceth
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+  - interrupt-names
+  - resets
+  - reset-names
+
+allOf:
+  - $ref: snps,dwmac.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    ethernet@4070000 {
+      compatible = "sophgo,cv1800b-dwmac", "snps,dwmac-3.70a";
+      reg = <0x04070000 0x10000>;
+      clocks = <&clk 35>, <&clk 36>;
+      clock-names = "stmmaceth", "ptp_ref";
+      interrupts = <31 IRQ_TYPE_LEVEL_HIGH>;
+      interrupt-names = "macirq";
+      phy-handle = <&internal_ephy>;
+      phy-mode = "internal";
+      resets = <&rst 12>;
+      reset-names = "stmmaceth";
+      rx-fifo-depth = <8192>;
+      tx-fifo-depth = <8192>;
+      snps,multicast-filter-bins = <0>;
+      snps,perfect-filter-entries = <1>;
+      snps,aal;
+      snps,txpbl = <8>;
+      snps,rxpbl = <8>;
+      snps,mtl-rx-config = <&gmac0_mtl_rx_setup>;
+      snps,mtl-tx-config = <&gmac0_mtl_tx_setup>;
+      snps,axi-config = <&gmac0_stmmac_axi_setup>;
+
+      mdio {
+        compatible = "snps,dwmac-mdio";
+        #address-cells = <1>;
+        #size-cells = <0>;
+      };
+
+      gmac0_mtl_rx_setup: rx-queues-config {
+        snps,rx-queues-to-use = <1>;
+        queue0 {};
+      };
+
+      gmac0_mtl_tx_setup: tx-queues-config {
+        snps,tx-queues-to-use = <1>;
+        queue0 {};
+      };
+
+      gmac0_stmmac_axi_setup: stmmac-axi-config {
+        snps,blen = <16 8 4 0 0 0 0>;
+        snps,rd_osr_lmt = <2>;
+        snps,wr_osr_lmt = <1>;
+      };
+    };
--
2.50.0


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