ath79: add support for ALFA Network AP121FE

The AP121FE is a slightly modified version of already supported AP121F
model (added to ar71xx in 0c6165d21a and to ath79 in 334bbc5198).

The differences in compare to AP121F:

- no micro SD card reader
- USB data lines are included in Type-A plug
- USB bus switched to device/peripheral mode (permanently, in bootstrap)

Other than that, specifications are the same:

- Atheros AR9331
- 400/400/200 MHz (CPU/DDR/AHB)
- 64 MB of RAM (DDR1)
- 16 MB of flash (SPI NOR)
- 1x 10/100 Mbps Ethernet
- 1T1R 2.4 GHz Wi-Fi, up to 15 dBm
- 1x IPEX/U.FL connector, internal PCB antenna
- 3x LED, 1x button, 1x switch
- 4-pin UART header on PCB (2 mm pitch)
- USB 2.0 Type-A plug (power and data)

Flash instruction (under U-Boot web recovery mode):

1. Configure PC with static IP 192.168.1.2/24.
2. Connect PC with RJ45 port, press the reset button, power up device,
   wait for first blink of all LEDs (indicates network setup), then keep
   button for 3 following blinks and release it.
3. Open 192.168.1.1 address in your browser and upload sysupgrade image.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

3 files changed, 145 insertions, 103 deletions

diff --git a/target/linux/ath79/dts/ar9331_alfa-network_ap121f.dts b/target/linux/ath79/dts/ar9331_alfa-network_ap121f.dts
index 286b6d1be2..bfb6d3152c 100644
--- a/target/linux/ath79/dts/ar9331_alfa-network_ap121f.dts
+++ b/target/linux/ath79/dts/ar9331_alfa-network_ap121f.dts
@@ -1,38 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 
-#include "ar9331.dtsi"
-
-#include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/input/input.h>
+#include "ar9331_alfa-network_ap121f.dtsi"
 
 / {
 	model = "ALFA Network AP121F";
 	compatible = "alfa-network,ap121f", "qca,ar9331";
 
-	aliases {
-		label-mac-device = &wmac;
-		led-boot = &led_vpn;
-		led-failsafe = &led_vpn;
-		led-upgrade = &led_vpn;
-		serial0 = &uart;
-	};
-
-	keys {
-		compatible = "gpio-keys";
-
-		reset {
-			label = "reset";
-			linux,code = <KEY_RESTART>;
-			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
-		};
-
-		switch {
-			label = "switch";
-			linux,code = <BTN_0>;
-			gpios = <&gpio 21 GPIO_ACTIVE_HIGH>;
-		};
-	};
-
 	leds {
 		compatible = "gpio-leds";
 
@@ -54,81 +27,6 @@
 	};
 };
 
-&eth0 {
-	status = "okay";
-
-	mtd-mac-address = <&art 0x0>;
-
-	gmac-config {
-		device = <&gmac>;
-		switch-phy-addr-swap = <0>;
-		switch-phy-swap = <0>;
-	};
-};
-
-&eth1 {
-	status = "okay";
-
-	compatible = "syscon", "simple-mfd";
-};
-
-&spi {
-	status = "okay";
-
-	num-cs = <1>;
-
-	flash@0 {
-		compatible = "jedec,spi-nor";
-		reg = <0>;
-		spi-max-frequency = <50000000>;
-		m25p,fast-read;
-
-		partitions {
-			compatible = "fixed-partitions";
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			partition@0 {
-				label = "u-boot";
-				reg = <0x000000 0x030000>;
-				read-only;
-			};
-
-			partition@30000 {
-				label = "u-boot-env";
-				reg = <0x030000 0x010000>;
-			};
-
-			art: partition@40000 {
-				label = "art";
-				reg = <0x040000 0x010000>;
-				read-only;
-			};
-
-			partition@50000 {
-				compatible = "denx,uimage";
-				label = "firmware";
-				reg = <0x050000 0xfb0000>;
-			};
-		};
-	};
-};
-
-&uart {
-	status = "okay";
-};
-
 &usb {
-	status = "okay";
 	dr_mode = "host";
 };
-
-&usb_phy {
-	status = "okay";
-};
-
-&wmac {
-	status = "okay";
-
-	mtd-cal-data = <&art 0x1000>;
-};
diff --git a/target/linux/ath79/dts/ar9331_alfa-network_ap121f.dtsi b/target/linux/ath79/dts/ar9331_alfa-network_ap121f.dtsi
new file mode 100644
index 0000000000..74d65d828a
--- /dev/null
+++ b/target/linux/ath79/dts/ar9331_alfa-network_ap121f.dtsi
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "ar9331.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	aliases {
+		label-mac-device = &wmac;
+		led-boot = &led_vpn;
+		led-failsafe = &led_vpn;
+		led-upgrade = &led_vpn;
+		serial0 = &uart;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+
+		switch {
+			label = "switch";
+			linux,code = <BTN_0>;
+			gpios = <&gpio 21 GPIO_ACTIVE_HIGH>;
+			debounce-interval = <60>;
+		};
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	mtd-mac-address = <&art 0x0>;
+
+	gmac-config {
+		device = <&gmac>;
+		switch-phy-addr-swap = <0>;
+		switch-phy-swap = <0>;
+	};
+};
+
+&eth1 {
+	status = "okay";
+
+	compatible = "syscon", "simple-mfd";
+};
+
+&spi {
+	status = "okay";
+
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+		m25p,fast-read;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x000000 0x030000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "u-boot-env";
+				reg = <0x030000 0x010000>;
+			};
+
+			art: partition@40000 {
+				label = "art";
+				reg = <0x040000 0x010000>;
+				read-only;
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x050000 0xfb0000>;
+			};
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&usb {
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&art 0x1000>;
+};
diff --git a/target/linux/ath79/dts/ar9331_alfa-network_ap121fe.dts b/target/linux/ath79/dts/ar9331_alfa-network_ap121fe.dts
new file mode 100644
index 0000000000..178a32f4d0
--- /dev/null
+++ b/target/linux/ath79/dts/ar9331_alfa-network_ap121fe.dts
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "ar9331_alfa-network_ap121f.dtsi"
+
+/ {
+	model = "ALFA Network AP121FE";
+	compatible = "alfa-network,ap121fe", "qca,ar9331";
+
+	leds {
+		compatible = "gpio-leds";
+
+		lan {
+			label = "ap121fe:green:lan";
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+		};
+
+		led_vpn: vpn {
+			label = "ap121fe:green:vpn";
+			gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan {
+			label = "ap121fe:green:wlan";
+			gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy0tpt";
+		};
+	};
+};
+
+&usb {
+	dr_mode = "peripheral";
+};