lantiq: add Falcon support

This adds support for the Intel Falcon SoC for GPON.

Support for the Falcon SoC was removed in commit c8218363951 svn rev:
40392 from OpenWrt, this commit adds it again.

This patch adds a new subtarget for the Falcon SoC, but it still misses
all the drivers needed to control the GPON part.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 80 insertions, 0 deletions

diff --git a/target/linux/lantiq/dts/FALCON-SFP.dts b/target/linux/lantiq/dts/FALCON-SFP.dts
new file mode 100644
index 0000000000..df2026c1dc
--- /dev/null
+++ b/target/linux/lantiq/dts/FALCON-SFP.dts
@@ -0,0 +1,80 @@
+/dts-v1/;
+
+#include "falcon.dtsi"
+#include "falcon-sflash-16M.dtsi"
+
+/ {
+	model = "SFP - Lantiq Falcon SFP Stick";
+	compatible = "lantiq,falcon-sfp", "lantiq,falcon";
+
+	chosen {
+		bootargs-append = "console=ttyLTQ0,115200 init=/etc/preinit";
+	};
+
+	aliases {
+		spi0 = &ebu_cs0;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x4000000>;  // 64M at 0x0
+	};
+
+	pinctrl {
+		compatible = "lantiq,pinctrl-falcon";
+
+		asc0_func1: func1 {
+			func1_tx {
+				lantiq,pins = "io32";
+				lantiq,mux = <1>;
+				lantiq,output = <0>;
+			};
+			func1_rx {
+				lantiq,pins = "io33";
+				lantiq,mux = <0>;
+			};
+		};
+		asc0_func2: func2 {
+			func2_tx {
+				lantiq,pins = "io32";
+				lantiq,mux = <0>;
+			};
+			func2_rx {
+				lantiq,pins = "io33";
+				lantiq,mux = <1>;
+				lantiq,input = <0>;
+			};
+		};
+		asc0_func3: func3 {
+			func3_tx {
+				lantiq,pins = "io32";
+				lantiq,mux = <1>;
+				lantiq,output = <0>;
+			};
+			func3_rx {
+				lantiq,pins = "io33";
+				lantiq,mux = <1>;
+				lantiq,input = <0>;
+			};
+		};
+	};
+
+	pinselect-asc0 {
+		compatible = "lantiq,pinselect-asc0";
+		pinctrl-names = "asc0", "func1", "func2", "func3";
+		pinctrl-0 = <&asc0_pins>;
+		pinctrl-1 = <&asc0_func1>;
+		pinctrl-2 = <&asc0_func2>;
+		pinctrl-3 = <&asc0_func3>;
+	};
+};
+
+&serial0 {
+	pinctrl-names = "default";
+	/* use "empty" pinctrl to leave setting from u-boot enabled */
+	pinctrl-0 = < >;
+};
+
+&i2c {
+	status = "okay";
+};