[PATCH v2 0/3] Add support for Nuvoton MA35D1 GMAC

[PATCH v2 0/3] Add support for Nuvoton MA35D1 GMAC

[Joey Lu]

This patch series is submitted to add GMAC support for Nuvoton MA35D1
SoC platform. This work involves implementing a GMAC driver glue layer
based on Synopsys DWMAC driver framework to leverage MA35D1's dual GMAC
interface capabilities.

Overview:
  1. Added a GMAC driver glue layer for MA35D1 SoC, providing support for
  the platform's two GMAC interfaces.
  2. Added device tree settings, with specific configurations for our
  development boards:
    a. SOM board: Configured for two RGMII interfaces.
    b. IoT board: Configured with one RGMII and one RMII interface.
  3. Added dt-bindings for the GMAC interfaces.

v2:
  - Update nuvoton,ma35d1-dwmac.yaml
    - Rename file to align with the compatible property.
    - Add an argument to syscon to replace mac-id,
      with corresponding descriptions.
    - Use tx-internal-delay-ps and rx-internal-delay-ps properties for
      configurable path delay with corresponding descriptions,
      allowing selection between GMAC internal and PHY.
    - Add all supported phy-mode options.
    - Remove unused properties.
  - Update dtsi
    - Modify syscon configuration to include an argument for
      GMAC interface selection.
  - Update dwmac-nuvoton driver
    - Remove redundant device information print statements.
    - Remove non-global parameters.
    - Retrieve GMAC interface selection from the syscon argument.
    - Parse Tx and Rx path delays by correct properties.
    - Update configurations to support Wake-on-LAN.

Joey Lu (3):
  dt-bindings: net: nuvoton: Add schema for MA35 family GMAC
  arm64: dts: nuvoton: Add Ethernet nodes
  net: stmmac: dwmac-nuvoton: Add dwmac support for MA35 family

 .../bindings/net/nuvoton,ma35d1-dwmac.yaml    | 170 +++++++++++++++++
 .../boot/dts/nuvoton/ma35d1-iot-512m.dts      |  12 ++
 .../boot/dts/nuvoton/ma35d1-som-256m.dts      |  10 +
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       |  52 +++++
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |  11 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
 .../ethernet/stmicro/stmmac/dwmac-nuvoton.c   | 179 ++++++++++++++++++
 7 files changed, 435 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c

-- 
2.34.1

[PATCH v2 1/3] dt-bindings: net: nuvoton: Add schema for MA35 family GMAC

[Joey Lu]

Create initial schema for Nuvoton MA35 family Gigabit MAC.

Signed-off-by: Joey Lu <a0987203069@gmail.com>
---
 .../bindings/net/nuvoton,ma35d1-dwmac.yaml    | 170 ++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml

diff --git a/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml b/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml
new file mode 100644
index 000000000000..45eaf13467b3
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml
@@ -0,0 +1,170 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/nuvoton,ma35d1-dwmac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton DWMAC glue layer controller
+
+maintainers:
+  - Joey Lu <yclu4@nuvoton.com>
+
+description:
+  Nuvoton 10/100/1000Mbps Gigabit Ethernet MAC Controller is based on
+  Synopsys DesignWare MAC (version 3.73a).
+
+# We need a select here so we don't match all nodes with 'snps,dwmac'
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - nuvoton,ma35d1-dwmac
+  required:
+    - compatible
+
+allOf:
+  - $ref: snps,dwmac.yaml#
+
+properties:
+  compatible:
+    - items:
+        - enum:
+            - nuvoton,ma35d1-dwmac
+        - const: snps,dwmac-3.70a
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 2
+    items:
+      - description: MAC clock
+      - description: PTP clock
+
+  clock-names:
+    minItems: 2
+    items:
+      - const: stmmaceth
+      - const: ptp_ref
+
+  nuvoton,sys:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: phandle to access syscon registers.
+          - description: GMAC interface ID.
+            enum: [0, 1]
+    description:
+      A phandle to the syscon with one argument that configures system registers
+      for MA35D1's two GMACs. The argument specifies the GMAC interface ID.
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    items:
+      - const: stmmaceth
+
+  phy-mode:
+    enum:
+      - rmii
+      - rgmii
+      - rgmii-id
+      - rgmii-txid
+      - rgmii-rxid
+
+  phy-handle:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Specifies a reference to a node representing a PHY device.
+
+  tx-internal-delay-ps:
+    enum: [0, 2000]
+    default: 0
+    description:
+      RGMII TX path delay used only when PHY operates in RGMII mode with
+      internal delay (phy-mode is 'rgmii-id' or 'rgmii-txid') in pico-seconds.
+
+  rx-internal-delay-ps:
+    enum: [0, 2000]
+    default: 0
+    description:
+      RGMII RX path delay used only when PHY operates in RGMII mode with
+      internal delay (phy-mode is 'rgmii-id' or 'rgmii-rxid') in pico-seconds.
+
+  mdio:
+    $ref: /schemas/net/mdio.yaml#
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+  - clocks
+  - clock-names
+  - nuvoton,sys
+  - resets
+  - reset-names
+  - phy-mode
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+    #include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
+    //Example 1
+    gmac0: ethernet@40120000 {
+        compatible = "nuvoton,ma35d1-dwmac";
+        reg = <0x0 0x40120000 0x0 0x10000>;
+        interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "macirq";
+        clocks = <&clk EMAC0_GATE>, <&clk EPLL_DIV8>;
+        clock-names = "stmmaceth", "ptp_ref";
+
+        nuvoton,sys = <&sys 0>;
+        resets = <&sys MA35D1_RESET_GMAC0>;
+        reset-names = "stmmaceth";
+
+        phy-mode = "rgmii-id";
+        phy-handle = <&eth_phy0>;
+        mdio0 {
+            compatible = "snps,dwmac-mdio";
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            eth_phy0: ethernet-phy@0 {
+                reg = <0>;
+            };
+        };
+    };
+
+  - |
+    //Example 2
+    gmac1: ethernet@40130000 {
+        compatible = "nuvoton,ma35d1-dwmac";
+        reg = <0x0 0x40130000 0x0 0x10000>;
+        interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "macirq";
+        clocks = <&clk EMAC1_GATE>, <&clk EPLL_DIV8>;
+        clock-names = "stmmaceth", "ptp_ref";
+
+        nuvoton,sys = <&sys 1>;
+        resets = <&sys MA35D1_RESET_GMAC1>;
+        reset-names = "stmmaceth";
+
+        phy-mode = "rmii";
+        phy-handle = <&eth_phy1>;
+        mdio1 {
+            compatible = "snps,dwmac-mdio";
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            eth_phy1: ethernet-phy@1 {
+                reg = <1>;
+            };
+        };
+    };
-- 
2.34.1

Re: [PATCH v2 1/3] dt-bindings: net: nuvoton: Add schema for MA35 family GMAC

[Rob Herring (Arm)]

On Wed, 13 Nov 2024 13:18:55 +0800, Joey Lu wrote:
> Create initial schema for Nuvoton MA35 family Gigabit MAC.
> 
> Signed-off-by: Joey Lu <a0987203069@gmail.com>
> ---
>  .../bindings/net/nuvoton,ma35d1-dwmac.yaml    | 170 ++++++++++++++++++
>  1 file changed, 170 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: ignoring, error in schema: properties: compatible
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: properties:compatible: [{'items': [{'enum': ['nuvoton,ma35d1-dwmac']}, {'const': 'snps,dwmac-3.70a'}]}] is not of type 'object', 'boolean'
	from schema $id: http://json-schema.org/draft-07/schema#
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: properties:compatible: [{'items': [{'enum': ['nuvoton,ma35d1-dwmac']}, {'const': 'snps,dwmac-3.70a'}]}] is not of type 'object', 'boolean'
	from schema $id: http://devicetree.org/meta-schemas/keywords.yaml#
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: properties:clock-names: 'oneOf' conditional failed, one must be fixed:
	[{'const': 'stmmaceth'}, {'const': 'ptp_ref'}] is too long
	[{'const': 'stmmaceth'}, {'const': 'ptp_ref'}] is too short
	False schema does not allow 2
	1 was expected
	hint: "minItems" is only needed if less than the "items" list length
	from schema $id: http://devicetree.org/meta-schemas/items.yaml#
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: properties:clocks: 'oneOf' conditional failed, one must be fixed:
	[{'description': 'MAC clock'}, {'description': 'PTP clock'}] is too long
	[{'description': 'MAC clock'}, {'description': 'PTP clock'}] is too short
	False schema does not allow 2
	1 was expected
	hint: "minItems" is only needed if less than the "items" list length
	from schema $id: http://devicetree.org/meta-schemas/items.yaml#
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: 'oneOf' conditional failed, one must be fixed:
	'unevaluatedProperties' is a required property
	'additionalProperties' is a required property
	hint: Either unevaluatedProperties or additionalProperties must be present
	from schema $id: http://devicetree.org/meta-schemas/core.yaml#
Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.example.dtb: /example-0/ethernet@40120000: failed to match any schema with compatible: ['nuvoton,ma35d1-dwmac']
Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.example.dtb: /example-1/ethernet@40130000: failed to match any schema with compatible: ['nuvoton,ma35d1-dwmac']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20241113051857.12732-2-a0987203069@gmail.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

Re: [PATCH v2 1/3] dt-bindings: net: nuvoton: Add schema for MA35 family GMAC

[Joey Lu]

Dear Rob,

Thank you for your reply.

On 11/13/24 14:15, Rob Herring (Arm) wrote:
> On Wed, 13 Nov 2024 13:18:55 +0800, Joey Lu wrote:
>> Create initial schema for Nuvoton MA35 family Gigabit MAC.
>>
>> Signed-off-by: Joey Lu <a0987203069@gmail.com>
>> ---
>>   .../bindings/net/nuvoton,ma35d1-dwmac.yaml    | 170 ++++++++++++++++++
>>   1 file changed, 170 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml
>>
> My bot found errors running 'make dt_binding_check' on your patch:
>
> yamllint warnings/errors:
>
> dtschema/dtc warnings/errors:
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: ignoring, error in schema: properties: compatible
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: properties:compatible: [{'items': [{'enum': ['nuvoton,ma35d1-dwmac']}, {'const': 'snps,dwmac-3.70a'}]}] is not of type 'object', 'boolean'
> 	from schema $id: http://json-schema.org/draft-07/schema#
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: properties:compatible: [{'items': [{'enum': ['nuvoton,ma35d1-dwmac']}, {'const': 'snps,dwmac-3.70a'}]}] is not of type 'object', 'boolean'
> 	from schema $id: http://devicetree.org/meta-schemas/keywords.yaml#
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: properties:clock-names: 'oneOf' conditional failed, one must be fixed:
> 	[{'const': 'stmmaceth'}, {'const': 'ptp_ref'}] is too long
> 	[{'const': 'stmmaceth'}, {'const': 'ptp_ref'}] is too short
> 	False schema does not allow 2
> 	1 was expected
> 	hint: "minItems" is only needed if less than the "items" list length
> 	from schema $id: http://devicetree.org/meta-schemas/items.yaml#
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: properties:clocks: 'oneOf' conditional failed, one must be fixed:
> 	[{'description': 'MAC clock'}, {'description': 'PTP clock'}] is too long
> 	[{'description': 'MAC clock'}, {'description': 'PTP clock'}] is too short
> 	False schema does not allow 2
> 	1 was expected
> 	hint: "minItems" is only needed if less than the "items" list length
> 	from schema $id: http://devicetree.org/meta-schemas/items.yaml#
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml: 'oneOf' conditional failed, one must be fixed:
> 	'unevaluatedProperties' is a required property
> 	'additionalProperties' is a required property
> 	hint: Either unevaluatedProperties or additionalProperties must be present
> 	from schema $id: http://devicetree.org/meta-schemas/core.yaml#
> Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.example.dtb: /example-0/ethernet@40120000: failed to match any schema with compatible: ['nuvoton,ma35d1-dwmac']
> Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.example.dtb: /example-1/ethernet@40130000: failed to match any schema with compatible: ['nuvoton,ma35d1-dwmac']
>
> doc reference errors (make refcheckdocs):
>
> See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20241113051857.12732-2-a0987203069@gmail.com
>
> The base for the series is generally the latest rc1. A different dependency
> should be noted in *this* patch.
>
> If you already ran 'make dt_binding_check' and didn't see the above
> error(s), then make sure 'yamllint' is installed and dt-schema is up to
> date:
>
> pip3 install dtschema --upgrade
>
> Please check and re-submit after running the above command yourself. Note
> that DT_SCHEMA_FILES can be set to your schema file to speed up checking
> your schema. However, it must be unset to test all examples with your schema.
>
These warnings/errors will be fixed in next patch.

Thanks!

BR,

Joey

[PATCH v2 2/3] arm64: dts: nuvoton: Add Ethernet nodes

[Joey Lu]

Add GMAC nodes for our MA35D1 development boards:
two RGMII interfaces for SOM board, and one RGMII and one RMII
interface for IoT board.

Signed-off-by: Joey Lu <a0987203069@gmail.com>
---
 .../boot/dts/nuvoton/ma35d1-iot-512m.dts      | 12 +++++
 .../boot/dts/nuvoton/ma35d1-som-256m.dts      | 10 ++++
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       | 52 +++++++++++++++++++
 3 files changed, 74 insertions(+)

diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts b/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
index 9482bec1aa57..5cc712ae92d8 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
@@ -18,6 +18,8 @@ aliases {
 		serial12 = &uart12;
 		serial13 = &uart13;
 		serial14 = &uart14;
+		ethernet0 = &gmac0;
+		ethernet1 = &gmac1;
 	};
 
 	chosen {
@@ -126,3 +128,13 @@ &uart14 {
 	pinctrl-0 = <&pinctrl_uart14>;
 	status = "okay";
 };
+
+&gmac0 {
+	phy-mode = "rgmii-id";
+	status = "okay";
+};
+
+&gmac1 {
+	phy-mode = "rmii";
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
index f6f20a17e501..08f5a7b5b507 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
@@ -18,6 +18,8 @@ aliases {
 		serial12 = &uart12;
 		serial14 = &uart14;
 		serial16 = &uart16;
+		ethernet0 = &eth0;
+		ethernet1 = &eth1;
 	};
 
 	chosen {
@@ -129,3 +131,11 @@ &uart16 {
 	pinctrl-0 = <&pinctrl_uart16>;
 	status = "okay";
 };
+
+&gmac0 {
+	status = "okay";
+};
+
+&gmac1 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
index e51b98f5bdce..7f7c7f8b7ad3 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
@@ -379,5 +379,57 @@ uart16: serial@40880000 {
 			clocks = <&clk UART16_GATE>;
 			status = "disabled";
 		};
+
+		gmac0: ethernet@40120000 {
+			compatible = "nuvoton,ma35d1-dwmac";
+			reg = <0x0 0x40120000 0x0 0x10000>;
+			interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "macirq";
+			clocks = <&clk EMAC0_GATE>, <&clk EPLL_DIV8>;
+			clock-names = "stmmaceth", "ptp_ref";
+
+			nuvoton,sys = <&sys 0>;
+			resets = <&sys MA35D1_RESET_GMAC0>;
+			reset-names = "stmmaceth";
+			status = "disabled";
+
+			phy-mode = "rgmii-id";
+			phy-handle = <&eth_phy0>;
+			mdio0 {
+				compatible = "snps,dwmac-mdio";
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				eth_phy0: ethernet-phy@0 {
+					reg = <0>;
+				};
+			};
+		};
+
+		gmac1: ethernet@40130000 {
+			compatible = "nuvoton,ma35d1-dwmac";
+			reg = <0x0 0x40130000 0x0 0x10000>;
+			interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "macirq";
+			clocks = <&clk EMAC1_GATE>, <&clk EPLL_DIV8>;
+			clock-names = "stmmaceth", "ptp_ref";
+
+			nuvoton,sys = <&sys 1>;
+			resets = <&sys MA35D1_RESET_GMAC1>;
+			reset-names = "stmmaceth";
+			status = "disabled";
+
+			phy-mode = "rgmii-id";
+			phy-handle = <&eth_phy1>;
+			mdio1 {
+				compatible = "snps,dwmac-mdio";
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				eth_phy1: ethernet-phy@1 {
+					reg = <1>;
+				};
+			};
+		};
 	};
 };
-- 
2.34.1

[PATCH v2 3/3] net: stmmac: dwmac-nuvoton: Add dwmac support for MA35 family

[Joey Lu]

Add support for Gigabit Ethernet on Nuvoton MA35 series using dwmac driver.

Signed-off-by: Joey Lu <a0987203069@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |  11 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
 .../ethernet/stmicro/stmmac/dwmac-nuvoton.c   | 179 ++++++++++++++++++
 3 files changed, 191 insertions(+)
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c

diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 05cc07b8f48c..55d94f669be3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -121,6 +121,17 @@ config DWMAC_MESON
 	  the stmmac device driver. This driver is used for Meson6,
 	  Meson8, Meson8b and GXBB SoCs.
 
+config DWMAC_NUVOTON
+	tristate "Nuvoton MA35 dwmac support"
+	default ARCH_MA35
+	depends on OF && (ARCH_MA35 || COMPILE_TEST)
+	select MFD_SYSCON
+	help
+	  Support for Ethernet controller on Nuvoton MA35 series SoC.
+
+	  This selects the Nuvoton MA35 series SoC glue layer support
+	  for the stmmac device driver.
+
 config DWMAC_QCOM_ETHQOS
 	tristate "Qualcomm ETHQOS support"
 	default ARCH_QCOM
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index c2f0e91f6bf8..c08fcfdd7b31 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_DWMAC_IPQ806X)	+= dwmac-ipq806x.o
 obj-$(CONFIG_DWMAC_LPC18XX)	+= dwmac-lpc18xx.o
 obj-$(CONFIG_DWMAC_MEDIATEK)	+= dwmac-mediatek.o
 obj-$(CONFIG_DWMAC_MESON)	+= dwmac-meson.o dwmac-meson8b.o
+obj-$(CONFIG_DWMAC_NUVOTON)	+= dwmac-nuvoton.o
 obj-$(CONFIG_DWMAC_QCOM_ETHQOS)	+= dwmac-qcom-ethqos.o
 obj-$(CONFIG_DWMAC_ROCKCHIP)	+= dwmac-rk.o
 obj-$(CONFIG_DWMAC_RZN1)	+= dwmac-rzn1.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c
new file mode 100644
index 000000000000..68c71d2b46f4
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * dwmac-nuvoton.c - Nuvoton MA35 series DWMAC specific glue layer
+ *
+ * Copyright (C) 2024 Nuvoton Technology Corp.
+ *
+ * Author: Joey Lu <yclu4@nuvoton.com>
+ */
+
+#include <linux/mfd/syscon.h>
+#include <linux/of_device.h>
+#include <linux/of_net.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/stmmac.h>
+
+#include "stmmac.h"
+#include "stmmac_platform.h"
+
+#define PATHDLY_DEC         134
+#define TXDLY_OFST          16
+#define TXDLY_MSK           GENMASK(19, 16)
+#define RXDLY_OFST          20
+#define RXDLY_MSK           GENMASK(23, 20)
+
+#define REG_SYS_GMAC0MISCR  0x108
+#define REG_SYS_GMAC1MISCR  0x10C
+
+#define MISCR_RMII          BIT(0)
+
+struct nvt_priv_data {
+	struct platform_device *pdev;
+	struct regmap *regmap;
+};
+
+static struct nvt_priv_data *
+nuvoton_gmac_setup(struct platform_device *pdev, struct plat_stmmacenet_data *plat)
+{
+	struct device *dev = &pdev->dev;
+	struct nvt_priv_data *bsp_priv;
+	phy_interface_t phy_mode;
+	u32 tx_delay, rx_delay;
+	u32 macid, arg, reg;
+
+	bsp_priv = devm_kzalloc(dev, sizeof(*bsp_priv), GFP_KERNEL);
+	if (!bsp_priv)
+		return ERR_PTR(-ENOMEM);
+
+	bsp_priv->regmap =
+		syscon_regmap_lookup_by_phandle_args(dev->of_node, "nuvoton,sys", 1, &macid);
+	if (IS_ERR(bsp_priv->regmap)) {
+		dev_err(dev, "Failed to get sys register\n");
+		return ERR_PTR(-ENODEV);
+	}
+	if (macid > 1) {
+		dev_err(dev, "Invalid sys arguments\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (of_property_read_u32(dev->of_node, "tx-internal-delay-ps", &arg)) {
+		tx_delay = 0; /* Default value is 0 */
+	} else {
+		if (arg > 0 && arg <= 2000) {
+			tx_delay = (arg == 2000) ? 0xF : (arg / PATHDLY_DEC);
+			dev_dbg(dev, "Set Tx path delay to 0x%x\n", tx_delay);
+		} else {
+			tx_delay = 0;
+			dev_err(dev, "Invalid Tx path delay argument. Setting to default.\n");
+		}
+	}
+	if (of_property_read_u32(dev->of_node, "rx-internal-delay-ps", &arg)) {
+		rx_delay = 0; /* Default value is 0 */
+	} else {
+		if (arg > 0 && arg <= 2000) {
+			rx_delay = (arg == 2000) ? 0xF : (arg / PATHDLY_DEC);
+			dev_dbg(dev, "Set Rx path delay to 0x%x\n", rx_delay);
+		} else {
+			rx_delay = 0;
+			dev_err(dev, "Invalid Rx path delay argument. Setting to default.\n");
+		}
+	}
+
+	regmap_read(bsp_priv->regmap,
+		    macid == 0 ? REG_SYS_GMAC0MISCR : REG_SYS_GMAC1MISCR, &reg);
+	reg &= ~(TXDLY_MSK | RXDLY_MSK);
+
+	if (of_get_phy_mode(pdev->dev.of_node, &phy_mode)) {
+		dev_err(dev, "missing phy mode property\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	switch (phy_mode) {
+	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
+		reg &= ~MISCR_RMII;
+		break;
+	case PHY_INTERFACE_MODE_RMII:
+		reg |= MISCR_RMII;
+		break;
+	default:
+		dev_err(dev, "Unsupported phy-mode (%d)\n", phy_mode);
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (!(reg & MISCR_RMII)) {
+		reg |= tx_delay << TXDLY_OFST;
+		reg |= rx_delay << RXDLY_OFST;
+	}
+
+	regmap_write(bsp_priv->regmap,
+		     macid == 0 ? REG_SYS_GMAC0MISCR : REG_SYS_GMAC1MISCR, reg);
+
+	bsp_priv->pdev = pdev;
+
+	return bsp_priv;
+}
+
+static int nuvoton_gmac_probe(struct platform_device *pdev)
+{
+	struct plat_stmmacenet_data *plat_dat;
+	struct stmmac_resources stmmac_res;
+	int ret;
+
+	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
+	if (ret)
+		return ret;
+
+	plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
+	if (IS_ERR(plat_dat))
+		return PTR_ERR(plat_dat);
+
+	/* Nuvoton DWMAC configs */
+	plat_dat->has_gmac = 1;
+	plat_dat->tx_fifo_size = 2048;
+	plat_dat->rx_fifo_size = 4096;
+	plat_dat->multicast_filter_bins = 0;
+	plat_dat->unicast_filter_entries = 8;
+	plat_dat->flags &= ~STMMAC_FLAG_USE_PHY_WOL;
+
+	plat_dat->bsp_priv = nuvoton_gmac_setup(pdev, plat_dat);
+	if (IS_ERR(plat_dat->bsp_priv)) {
+		ret = PTR_ERR(plat_dat->bsp_priv);
+		return ret;
+	}
+
+	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+	if (ret)
+		return ret;
+
+	/* We support WoL by magic packet, override pmt to make it work! */
+	plat_dat->pmt = 1;
+	dev_info(&pdev->dev, "Wake-Up On Lan supported\n");
+	device_set_wakeup_capable(&pdev->dev, 1);
+
+	return 0;
+}
+
+static const struct of_device_id nuvoton_dwmac_match[] = {
+	{ .compatible = "nuvoton,ma35d1-dwmac"},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, nuvoton_dwmac_match);
+
+static struct platform_driver nuvoton_dwmac_driver = {
+	.probe  = nuvoton_gmac_probe,
+	.remove_new = stmmac_pltfr_remove,
+	.driver = {
+		.name           = "nuvoton-dwmac",
+		.pm		= &stmmac_pltfr_pm_ops,
+		.of_match_table = nuvoton_dwmac_match,
+	},
+};
+module_platform_driver(nuvoton_dwmac_driver);
+
+MODULE_AUTHOR("Joey Lu <yclu4@nuvoton.com>");
+MODULE_DESCRIPTION("Nuvoton DWMAC specific glue layer");
+MODULE_LICENSE("GPL v2");
-- 
2.34.1

Re: [PATCH v2 3/3] net: stmmac: dwmac-nuvoton: Add dwmac support for MA35 family

[kernel test robot]

Hi Joey,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on net-next/main net/main linus/master v6.12-rc7 next-20241113]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Joey-Lu/dt-bindings-net-nuvoton-Add-schema-for-MA35-family-GMAC/20241113-132300
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20241113051857.12732-4-a0987203069%40gmail.com
patch subject: [PATCH v2 3/3] net: stmmac: dwmac-nuvoton: Add dwmac support for MA35 family
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20241113/202411131946.ozq1D0f2-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241113/202411131946.ozq1D0f2-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411131946.ozq1D0f2-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c:20: warning: expecting prototype for dwmac(). Prototype was for PATHDLY_DEC() instead

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for GET_FREE_REGION
   Depends on [n]: SPARSEMEM [=n]
   Selected by [m]:
   - RESOURCE_KUNIT_TEST [=m] && RUNTIME_TESTING_MENU [=y] && KUNIT [=m]


vim +20 drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c

    19	
  > 20	#define PATHDLY_DEC         134
    21	#define TXDLY_OFST          16
    22	#define TXDLY_MSK           GENMASK(19, 16)
    23	#define RXDLY_OFST          20
    24	#define RXDLY_MSK           GENMASK(23, 20)
    25	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v2 3/3] net: stmmac: dwmac-nuvoton: Add dwmac support for MA35 family

[Andrew Lunn]

> +	if (of_property_read_u32(dev->of_node, "tx-internal-delay-ps", &arg)) {
> +		tx_delay = 0; /* Default value is 0 */
> +	} else {
> +		if (arg > 0 && arg <= 2000) {
> +			tx_delay = (arg == 2000) ? 0xF : (arg / PATHDLY_DEC);
> +			dev_dbg(dev, "Set Tx path delay to 0x%x\n", tx_delay);
> +		} else {
> +			tx_delay = 0;
> +			dev_err(dev, "Invalid Tx path delay argument. Setting to default.\n");
> +		}
> +	}

The device tree binding says that only [0, 2000] are valid. You should
enforce this here, return -EINVAL of any other value.

	Andrew

Re: [PATCH v2 3/3] net: stmmac: dwmac-nuvoton: Add dwmac support for MA35 family

[Joey Lu]

Dear Andrew,

Thank you for your reply.

On 11/14/24 10:56, Andrew Lunn wrote:
>> +	if (of_property_read_u32(dev->of_node, "tx-internal-delay-ps", &arg)) {
>> +		tx_delay = 0; /* Default value is 0 */
>> +	} else {
>> +		if (arg > 0 && arg <= 2000) {
>> +			tx_delay = (arg == 2000) ? 0xF : (arg / PATHDLY_DEC);
>> +			dev_dbg(dev, "Set Tx path delay to 0x%x\n", tx_delay);
>> +		} else {
>> +			tx_delay = 0;
>> +			dev_err(dev, "Invalid Tx path delay argument. Setting to default.\n");
>> +		}
>> +	}
> The device tree binding says that only [0, 2000] are valid. You should
> enforce this here, return -EINVAL of any other value.
>
> 	Andrew

This will be fixed in the next version. And I will correct error messages.

Thanks!

BR,

Joey