ARM: dts: meson8b: extend ethernet controller description

Enable S805 (aka Meson8b) ethernet pin multiplexing and
extend the controller description.
The programmable ethernet (PRG_ETHERNET) register address
value (0xc1108108), contained in meson.dtsi, is overridden
according to the value found in S805 SoC manual.
This also required to switch to "amlogic,meson8b-dwmac" compatible
to correctly configure that register.
The two clock sources "clkin0" and "clkin1" are both equals
to MPLL2 because, as reported in bit 9-7 register description,
that is the only Meson8b ethernet clock source.
Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>
Tested-by: Linus Lüssing <linus.luessing@c0d3.blue>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm/boot/dts/meson8b.dtsi

@@ -185,6 +185,27 @@ gpio: banks@80b0 {
 			#gpio-cells = <2>;
 			gpio-ranges = <&pinctrl_cbus 0 0 130>;
 		};
+
+		eth_rgmii_pins: eth-rgmii {
+			mux {
+				groups = "eth_tx_clk",
+					 "eth_tx_en",
+					 "eth_txd1_0",
+					 "eth_txd1_1",
+					 "eth_txd0_0",
+					 "eth_txd0_1",
+					 "eth_rx_clk",
+					 "eth_rx_dv",
+					 "eth_rxd1",
+					 "eth_rxd0",
+					 "eth_mdio_en",
+					 "eth_mdc",
+					 "eth_ref_clk",
+					 "eth_txd2",
+					 "eth_txd3";
+				function = "ethernet";
+			};
+		};
 	};
 };
 
@@ -203,8 +224,18 @@ &efuse {
 };
 
 &ethmac {
-	clocks = <&clkc CLKID_ETH>;
-	clock-names = "stmmaceth";
+	compatible = "amlogic,meson8b-dwmac", "snps,dwmac-3.70a", "snps,dwmac";
+
+	reg = <0xc9410000 0x10000
+	       0xc1108140 0x4>;
+
+	clocks = <&clkc CLKID_ETH>,
+		 <&clkc CLKID_MPLL2>,
+		 <&clkc CLKID_MPLL2>;
+	clock-names = "stmmaceth", "clkin0", "clkin1";
+
+	resets = <&reset RESET_ETHERNET>;
+	reset-names = "stmmaceth";
 };
 
 &gpio_intc {