Add DT info for the stmmac ethernet MAC which found in
the Amlogic's Meson-AXG SoC, also describe the ethernet
pinctrl & clock information here.

This is tested in the S400 dev board which use a RTL8211F PHY,
and the pins connect to the 'eth_rgmii_y_pins' group.

Signed-off-by: Yixun Lan <yixun....@amlogic.com>
---
 arch/arm64/boot/dts/amlogic/meson-axg-s400.dts |  7 ++++
 arch/arm64/boot/dts/amlogic/meson-axg.dtsi     | 53 ++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts 
b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
index 9eb6aaee155d..7b39a9fe2b0f 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
@@ -21,3 +21,10 @@
        status = "okay";
 };
 
+&ethmac {
+       status = "okay";
+       phy-mode = "rgmii";
+
+       pinctrl-0 = <&eth_rgmii_y_pins>;
+       pinctrl-names = "default";
+};
diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
index 65945c6c8b65..57faaa9d8013 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
@@ -157,6 +157,19 @@
                        #address-cells = <0>;
                };
 
+               ethmac: ethernet@ff3f0000 {
+                       compatible = "amlogic,meson-axg-dwmac", 
"amlogic,meson-gxbb-dwmac", "snps,dwmac";
+                       reg = <0x0 0xff3f0000 0x0 0x10000
+                               0x0 0xff634540 0x0 0x8>;
+                       interrupts = <GIC_SPI 8 IRQ_TYPE_EDGE_RISING>;
+                       interrupt-names = "macirq";
+                       status = "disabled";
+                       clocks = <&clkc CLKID_ETH>,
+                                <&clkc CLKID_FCLK_DIV2>,
+                                <&clkc CLKID_MPLL2>;
+                       clock-names = "stmmaceth", "clkin0", "clkin1";
+               };
+
                hiubus: hiubus@ff63c000 {
                        compatible = "simple-bus";
                        reg = <0x0 0xff63c000 0x0 0x1c00>;
@@ -203,6 +216,46 @@
                                        #gpio-cells = <2>;
                                        gpio-ranges = <&pinctrl_periphs 0 0 86>;
                                };
+
+                               eth_rgmii_x_pins: eth-x-rgmii {
+                                       mux {
+                                               groups = "eth_mdio_x",
+                                                      "eth_mdc_x",
+                                                      "eth_rgmii_rx_clk_x",
+                                                      "eth_rx_dv_x",
+                                                      "eth_rxd0_x",
+                                                      "eth_rxd1_x",
+                                                      "eth_rxd2_rgmii",
+                                                      "eth_rxd3_rgmii",
+                                                      "eth_rgmii_tx_clk",
+                                                      "eth_txen_x",
+                                                      "eth_txd0_x",
+                                                      "eth_txd1_x",
+                                                      "eth_txd2_rgmii",
+                                                      "eth_txd3_rgmii";
+                                               function = "eth";
+                                       };
+                               };
+
+                               eth_rgmii_y_pins: eth-y-rgmii {
+                                       mux {
+                                               groups = "eth_mdio_y",
+                                                      "eth_mdc_y",
+                                                      "eth_rgmii_rx_clk_y",
+                                                      "eth_rx_dv_y",
+                                                      "eth_rxd0_y",
+                                                      "eth_rxd1_y",
+                                                      "eth_rxd2_rgmii",
+                                                      "eth_rxd3_rgmii",
+                                                      "eth_rgmii_tx_clk",
+                                                      "eth_txen_y",
+                                                      "eth_txd0_y",
+                                                      "eth_txd1_y",
+                                                      "eth_txd2_rgmii",
+                                                      "eth_txd3_rgmii";
+                                               function = "eth";
+                                       };
+                               };
                        };
                };
 
-- 
2.14.1

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