[PATCH net-next RFC v4 1/4] dt-bindings: net: Add support for Sophgo CV1800 dwmac

Inochi Amaoto
2025-07-01T01:17:53Z

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>
---
.../bindings/net/sophgo,cv1800b-dwmac.yaml | 113 ++++++++++++++++++
1 file changed, 113 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..8abd2cf06e2c
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml
@@ -0,0 +1,113 @@
+# 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";
+ 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>;
+ status = "disabled";
+
+ 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