ath79: split Teltonika RUT955 to support other RUT9xx models

Split device-tree of Teltonika RUT955 into a generic RUT9xx part and
a part specific to that version of RUT955 already supported.
Also harmonize GPIO and LED names with what is used by the vendor
firmware and assign RS485 DTR signal.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 179 insertions, 0 deletions

diff --git a/target/linux/ath79/dts/ar9344_teltonika_rut9xx.dtsi b/target/linux/ath79/dts/ar9344_teltonika_rut9xx.dtsi
new file mode 100644
index 0000000000..0025e5d8b0
--- /dev/null
+++ b/target/linux/ath79/dts/ar9344_teltonika_rut9xx.dtsi
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "ar9344.dtsi"
+
+/ {
+	compatible = "teltonika,rut9xx", "qca,ar9344";
+
+	aliases {
+		serial0 = &uart;
+		serial1 = &hs_uart;
+		label-mac-device = &eth1;
+	};
+
+	i2c0: i2c {
+		compatible = "i2c-gpio";
+		scl-gpios = <&gpio 16 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+		sda-gpios = <&gpio 17 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hwmon@4d {
+			compatible = "microchip,mcp3221";
+			reg = <0x4d>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+};
+
+&ref {
+	clock-frequency = <40000000>;
+};
+
+&uart {
+	status = "okay";
+};
+
+&hs_uart {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pmx_uart2>;
+
+	rts-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+	rs485-rts-active-low;
+	linux,rs485-enabled-at-boot-time;
+};
+
+&spi {
+	status = "okay";
+	num-cs = <2>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pmx_spi>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x20000>;
+				read-only;
+			};
+
+			config: partition@20000 {
+				label = "config";
+				reg = <0x20000 0x10000>;
+				read-only;
+			};
+
+			art: partition@30000 {
+				label = "art";
+				reg = <0x30000 0x10000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "firmware";
+				reg = <0x40000 0xf30000>;
+				compatible = "tplink,firmware";
+			};
+
+			partition@f70000 {
+				label = "event-log";
+				reg = <0xf70000 0x90000>;
+				read-only;
+			};
+		};
+	};
+
+	microsd@1 {
+		status = "disabled";
+
+		compatible = "mmc-spi-slot";
+		spi-max-frequency = <25000000>;
+		reg = <1>;
+		voltage-ranges = <3200 3400>;
+		broken-cd;
+	};
+};
+
+&usb {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	port@1 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <1>;
+
+		port@1 {
+			compatible = "usb-a-connector";
+			reg = <1>;
+		};
+
+		port@3 {
+			label = "RS-232 serial adapter";
+			reg = <3>;
+		};
+
+		port@4 {
+			label = "internal wwan modem";
+			reg = <4>;
+		};
+	};
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&art 0x1000>;
+	mtd-mac-address = <&config 0x0>;
+	mtd-mac-address-increment = <2>;
+};
+
+&pinmux {
+	pmx_spi: spi {
+		// SPI_CS1 on GPIO 3
+		pinctrl-single,bits = <0x0 0x07000000 0xff000000>;
+	};
+
+	pmx_leds_switch: leds_switch {
+		// switch port LEDs on GPIO 1, GPIO 13, GPIO 14 and GPIO 22
+		pinctrl-single,bits =  <0x0 0x00002d00 0x0000ff00>,
+					<0xc 0x002c2b00 0x00ffff00>,
+					<0x14 0x002a0000 0x00ff0000>;
+	};
+
+	pmx_uart2: uart2 {
+		// UART1_DTR on GPIO 0, UART1_RD on GPIO 11, UART1_TD on GPIO 18
+		pinctrl-single,bits = <0x0 0x0 0xff>,
+				<0x10 0x4f000000 0xff000000>,
+				<0x3c 0x000b0000 0x00ff0000>;
+	};
+};