arm64: dts: renesas: rzg2ul-smarc-som: Enable Ethernet on SMARC platform

Enable Ethernet{0,1} interfaces on RZ/G2UL SMARC EVK.

Ethernet0 pins are muxed with CAN0, CAN1, SSI1 and RSPI1 pins and Ethernet0
device selection is based on the SW1[3] switch position.

Set SW1[3] to position OFF for selecting CAN0, CAN1, SSI1 and RSPI1.
Set SW1[3] to position ON for selecting Ethernet0.

This patch disables Ethernet0 on RZ/G2UL SMARC platform by default.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20220402081328.26292-8-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/rzg2ul-smarc-som.dtsi

@@ -9,8 +9,13 @@
 #include <dt-bindings/pinctrl/rzg2l-pinctrl.h>
 
 / {
+	aliases {
+		ethernet0 = &eth0;
+		ethernet1 = &eth1;
+	};
+
 	chosen {
-		bootargs = "ignore_loglevel";
+		bootargs = "ignore_loglevel rw root=/dev/nfs ip=on";
 	};
 
 	memory@48000000 {
@@ -52,11 +57,101 @@
 #endif
 };
 
+#if (!SW_ET0_EN_N)
+&eth0 {
+	pinctrl-0 = <&eth0_pins>;
+	pinctrl-names = "default";
+	phy-handle = <&phy0>;
+	phy-mode = "rgmii-id";
+	status = "okay";
+
+	phy0: ethernet-phy@7 {
+		compatible = "ethernet-phy-id0022.1640",
+			     "ethernet-phy-ieee802.3-c22";
+		reg = <7>;
+		rxc-skew-psec = <2400>;
+		txc-skew-psec = <2400>;
+		rxdv-skew-psec = <0>;
+		txdv-skew-psec = <0>;
+		rxd0-skew-psec = <0>;
+		rxd1-skew-psec = <0>;
+		rxd2-skew-psec = <0>;
+		rxd3-skew-psec = <0>;
+		txd0-skew-psec = <0>;
+		txd1-skew-psec = <0>;
+		txd2-skew-psec = <0>;
+		txd3-skew-psec = <0>;
+	};
+};
+#endif
+
+&eth1 {
+	pinctrl-0 = <&eth1_pins>;
+	pinctrl-names = "default";
+	phy-handle = <&phy1>;
+	phy-mode = "rgmii-id";
+	status = "okay";
+
+	phy1: ethernet-phy@7 {
+		compatible = "ethernet-phy-id0022.1640",
+			     "ethernet-phy-ieee802.3-c22";
+		reg = <7>;
+		rxc-skew-psec = <2400>;
+		txc-skew-psec = <2400>;
+		rxdv-skew-psec = <0>;
+		txdv-skew-psec = <0>;
+		rxd0-skew-psec = <0>;
+		rxd1-skew-psec = <0>;
+		rxd2-skew-psec = <0>;
+		rxd3-skew-psec = <0>;
+		txd0-skew-psec = <0>;
+		txd1-skew-psec = <0>;
+		txd2-skew-psec = <0>;
+		txd3-skew-psec = <0>;
+	};
+};
+
 &extal_clk {
 	clock-frequency = <24000000>;
 };
 
 &pinctrl {
+	eth0_pins: eth0 {
+		pinmux = <RZG2L_PORT_PINMUX(4, 5, 1)>, /* ET0_LINKSTA */
+			 <RZG2L_PORT_PINMUX(4, 3, 1)>, /* ET0_MDC */
+			 <RZG2L_PORT_PINMUX(4, 4, 1)>, /* ET0_MDIO */
+			 <RZG2L_PORT_PINMUX(1, 0, 1)>, /* ET0_TXC */
+			 <RZG2L_PORT_PINMUX(1, 1, 1)>, /* ET0_TX_CTL */
+			 <RZG2L_PORT_PINMUX(1, 2, 1)>, /* ET0_TXD0 */
+			 <RZG2L_PORT_PINMUX(1, 3, 1)>, /* ET0_TXD1 */
+			 <RZG2L_PORT_PINMUX(1, 4, 1)>, /* ET0_TXD2 */
+			 <RZG2L_PORT_PINMUX(2, 0, 1)>, /* ET0_TXD3 */
+			 <RZG2L_PORT_PINMUX(3, 0, 1)>, /* ET0_RXC */
+			 <RZG2L_PORT_PINMUX(3, 1, 1)>, /* ET0_RX_CTL */
+			 <RZG2L_PORT_PINMUX(3, 2, 1)>, /* ET0_RXD0 */
+			 <RZG2L_PORT_PINMUX(3, 3, 1)>, /* ET0_RXD1 */
+			 <RZG2L_PORT_PINMUX(4, 0, 1)>, /* ET0_RXD2 */
+			 <RZG2L_PORT_PINMUX(4, 1, 1)>; /* ET0_RXD3 */
+	};
+
+	eth1_pins: eth1 {
+		pinmux = <RZG2L_PORT_PINMUX(10, 4, 1)>, /* ET1_LINKSTA */
+			 <RZG2L_PORT_PINMUX(10, 2, 1)>, /* ET1_MDC */
+			 <RZG2L_PORT_PINMUX(10, 3, 1)>, /* ET1_MDIO */
+			 <RZG2L_PORT_PINMUX(7, 0, 1)>, /* ET1_TXC */
+			 <RZG2L_PORT_PINMUX(7, 1, 1)>, /* ET1_TX_CTL */
+			 <RZG2L_PORT_PINMUX(7, 2, 1)>, /* ET1_TXD0 */
+			 <RZG2L_PORT_PINMUX(7, 3, 1)>, /* ET1_TXD1 */
+			 <RZG2L_PORT_PINMUX(7, 4, 1)>, /* ET1_TXD2 */
+			 <RZG2L_PORT_PINMUX(8, 0, 1)>, /* ET1_TXD3 */
+			 <RZG2L_PORT_PINMUX(8, 4, 1)>, /* ET1_RXC */
+			 <RZG2L_PORT_PINMUX(9, 0, 1)>, /* ET1_RX_CTL */
+			 <RZG2L_PORT_PINMUX(9, 1, 1)>, /* ET1_RXD0 */
+			 <RZG2L_PORT_PINMUX(9, 2, 1)>, /* ET1_RXD1 */
+			 <RZG2L_PORT_PINMUX(9, 3, 1)>, /* ET1_RXD2 */
+			 <RZG2L_PORT_PINMUX(10, 0, 1)>; /* ET1_RXD3 */
+	};
+
 	sdhi0_emmc_pins: sd0emmc {
 		sd0_emmc_data {
 			pins = "SD0_DATA0", "SD0_DATA1", "SD0_DATA2", "SD0_DATA3",

arch/arm64/boot/dts/renesas/rzg2ul-smarc.dtsi

@@ -9,9 +9,11 @@
  * DIP-Switch SW1 setting
  * 1 : High; 0: Low
  * SW1-2 : SW_SD0_DEV_SEL	(0: uSD; 1: eMMC)
+ * SW1-3 : SW_ET0_EN_N		(0: ETHER0; 1: CAN0, CAN1, SSI1, RSPI1)
  * Please change below macros according to SW1 setting
  */
 #define SW_SW0_DEV_SEL	1
+#define SW_ET0_EN_N	1
 
 #include "rzg2ul-smarc-som.dtsi"
 #include "rzg2ul-smarc-pinfunction.dtsi"