see: https://github.com/openwrt/openwrt/pull/14706

openwrt_ELECOM_WAB-I1750-PS_v23.05.2.patch

diff --git a/feeds.conf b/feeds.conf
new file mode 100644
index 00000000..7dca392f
--- /dev/null
+++ b/feeds.conf
@@ -0,0 +1,4 @@
+src-git packages https://github.com/openwrt/packages.git^8e3a1824645f5e73ec44c897ac0755c53fb4a1f8
+src-git luci https://github.com/openwrt/luci.git^7739e9f5b03b830f51d53c384be4baef95054cb3
+src-git routing https://github.com/openwrt/routing.git^83ef3784a9092cfd0a900cc28e2ed4e13671d667
+src-git telephony https://github.com/openwrt/telephony.git^9746ae8f964e18f04b64fbe1956366954ff223f8
diff --git a/target/linux/ath79/dts/qca9557_elecom_wab-s1167-ps.dts b/target/linux/ath79/dts/qca9557_elecom_wab-s1167-ps.dts
new file mode 100644
index 00000000..facead97
--- /dev/null
+++ b/target/linux/ath79/dts/qca9557_elecom_wab-s1167-ps.dts
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca955x_elecom_wab.dtsi"
+
+/ {
+	compatible = "elecom,wab-s1167-ps", "qca,qca9557";
+	model = "ELECOM WAB-S1167-PS";
+};
diff --git a/target/linux/ath79/dts/qca9557_elecom_wab-s600-ps.dts b/target/linux/ath79/dts/qca9557_elecom_wab-s600-ps.dts
new file mode 100644
index 00000000..8d4b1d3a
--- /dev/null
+++ b/target/linux/ath79/dts/qca9557_elecom_wab-s600-ps.dts
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca955x_elecom_wab.dtsi"
+
+/ {
+	compatible = "elecom,wab-s600-ps", "qca,qca9557";
+	model = "ELECOM WAB-S600-PS";
+};
diff --git a/target/linux/ath79/dts/qca9558_elecom_wab-i1750-ps.dts b/target/linux/ath79/dts/qca9558_elecom_wab-i1750-ps.dts
new file mode 100644
index 00000000..6f157cf9
--- /dev/null
+++ b/target/linux/ath79/dts/qca9558_elecom_wab-i1750-ps.dts
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca955x_elecom_wab.dtsi"
+
+/ {
+	compatible = "elecom,wab-i1750-ps", "qca,qca9558";
+	model = "ELECOM WAB-I1750-PS";
+
+	ahb {
+		apb {
+			/* "SERIAL" port (RJ-45) on the case */
+			uart1: uart@18500000 {
+				compatible = "qca,ar9330-uart";
+				reg = <0x18500000 0x14>;
+
+				pinctrl-names = "default";
+				pinctrl-0 = <&pmx_uart1_in_pins &pmx_uart1_out_pins
+					     &jtag_disable_pins>;
+
+				interrupts = <6>;
+				interrupt-parent = <&miscintc>;
+
+				clocks = <&pll ATH79_CLK_UART1>;
+				clock-names = "uart";
+
+				/* QCA955x HS UART is not supported */
+				status = "disabled";
+			};
+		};
+	};
+};
+
+&gpio {
+	uart1-out {
+		gpio-hog;
+		gpios = <0 GPIO_ACTIVE_HIGH>,	/* UART1_TD */
+			<2 GPIO_ACTIVE_HIGH>;	/* UART1_RTS */
+		output-low;
+	};
+
+	uart1-in {
+		gpio-hog;
+		gpios = <1 GPIO_ACTIVE_HIGH>,	/* UART1_RD */
+			<3 GPIO_ACTIVE_HIGH>;	/* UART1_CTS */
+		input;
+	};
+};
+
+&pinmux {
+	pmx_uart1_out_pins: uart1-out-pins {
+		/*
+		 * mux as uart1 output
+		 *
+		 * GPIO0: UART1_TD (sel:18)
+		 * GPIO2: UART1_RTS (sel:19)
+		 */
+		pinctrl-single,bits = <0x0 0x130012 0xff00ff>;
+	};
+
+	pmx_uart1_in_pins: uart1-in-pins {
+		/*
+		 * mux as uart1 input
+		 *
+		 * GPIO1: UART1_RD
+		 * GPIO3: UART1_CTS
+		 */
+		pinctrl-single,bits = <0x3c 0x3010000 0xffff0000>;
+	};
+};
diff --git a/target/linux/ath79/dts/qca955x_elecom_wab.dtsi b/target/linux/ath79/dts/qca955x_elecom_wab.dtsi
new file mode 100644
index 00000000..f94f5824
--- /dev/null
+++ b/target/linux/ath79/dts/qca955x_elecom_wab.dtsi
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca955x.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	aliases {
+		led-boot = &led_status;
+		led-failsafe = &led_status;
+		led-upgrade = &led_status;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-0 {
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_WLAN;
+			function-enumerator = <24>;
+			linux,default-trigger = "phy1tpt";
+		};
+
+		led_status: led-1 {
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_STATUS;
+		};
+
+		led-2 {
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_USB;
+			trigger-sources = <&usb_port1>;
+			linux,default-trigger = "usbport";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		button-wps {
+			label = "wps";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+			debounce-interval = <60>;
+		};
+
+		button-reset {
+			label = "reset";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+			debounce-interval = <60>;
+		};
+
+		button-eject {
+			label = "eject";
+			gpios = <&gpio 19 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_EJECTCD>;
+			debounce-interval = <60>;
+		};
+	};
+
+	beeper {
+		compatible = "gpio-beeper";
+		gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
+	};
+
+	reg_usb_vbus: regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "usb-vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio 11 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+	};
+
+	watchdog {
+		compatible = "linux,wdt-gpio";
+		gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+		hw_algo = "toggle";
+		hw_margin_ms = <300>;
+		always-running;
+	};
+};
+
+&mdio0 {
+	status = "okay";
+
+	ethphy4: ethernet-phy@4 {
+		compatible = "ethernet-phy-id004d,d072",
+			     "ethernet-phy-ieee802.3-c22";
+		reg = <0x4>;
+		eee-broken-100tx;
+		eee-broken-1000t;
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&ethphy4>;
+	phy-mode = "rgmii-rxid";
+	pll-data = <0xae000000 0x80000101 0x80001313>;
+
+	gmac-config {
+		device = <&gmac>;
+
+		rxdv-delay = <3>;
+		rxd-delay = <3>;
+		txen-delay = <0>;
+		txd-delay = <0>;
+		rgmii-enabled = <1>;
+	};
+};
+
+&mdio1 {
+	status = "okay";
+
+	ethphy1: ethernet-phy@1 {
+		compatible = "ethernet-phy-id004d,d074",
+			     "ethernet-phy-ieee802.3-c22";
+		reg = <0x1>;
+		at803x-override-sgmii-link-check;
+	};
+};
+
+&eth1 {
+	status = "okay";
+
+	phy-handle = <&ethphy1>;
+	pll-data = <0x03000000 0x00000101 0x00001313>;
+
+	qca955x-sgmii-fixup;
+};
+
+&pcie0 {
+	status = "okay";
+
+	wifi@0,0 {
+		compatible = "qcom,ath10k";
+		reg = <0x0000 0 0 0 0>;
+		nvmem-cells = <&cal_art_5000>;
+		nvmem-cell-names = "calibration";
+	};
+};
+
+&spi {
+	status = "okay";
+
+	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 0x40000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "u-boot-env";
+				reg = <0x40000 0x10000>;
+				read-only;
+			};
+
+			partition@50000 {
+				label = "art";
+				reg = <0x50000 0x10000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					cal_art_1000: calibration@1000 {
+						reg = <0x1000 0x440>;
+					};
+
+					cal_art_5000: calibration@5000 {
+						reg = <0x5000 0x844>;
+					};
+				};
+			};
+
+			partition@60000 {
+				label = "art2";
+				reg = <0x60000 0x10000>;
+				read-only;
+			};
+
+			partition@70000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x70000 0xe00000>;
+			};
+
+			partition@e70000 {
+				label = "manufacture";
+				reg = <0xe70000 0x100000>;
+				read-only;
+			};
+
+			partition@f70000 {
+				label = "backup";
+				reg = <0xf70000 0x10000>;
+				read-only;
+			};
+
+			partition@f80000 {
+				label = "storage";
+				reg = <0xf80000 0x80000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&usb_phy0 {
+	status = "okay";
+};
+
+&usb0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	dr_mode = "host";
+	vbus-supply = <&reg_usb_vbus>;
+
+	usb_port1: port@1 {
+		reg = <1>;
+		#trigger-source-cells = <0>;
+	};
+};
+
+&wdt {
+	status = "disabled";
+};
+
+&wmac {
+	status = "okay";
+
+	nvmem-cells = <&cal_art_1000>;
+	nvmem-cell-names = "calibration";
+};
diff --git a/target/linux/ath79/generic/base-files/etc/board.d/02_network b/target/linux/ath79/generic/base-files/etc/board.d/02_network
index 0d7396a0..12b0193b 100644
--- a/target/linux/ath79/generic/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/generic/base-files/etc/board.d/02_network
@@ -139,6 +139,9 @@ ath79_setup_interfaces()
 	alfa-network,n5q|\
 	devolo,dvl1200e|\
 	devolo,dvl1750e|\
+	elecom,wab-i1750-ps|\
+	elecom,wab-s1167-ps|\
+	elecom,wab-s600-ps|\
 	engenius,enstationac-v1|\
 	engenius,ews511ap|\
 	engenius,ews660ap|\
@@ -679,6 +682,9 @@ ath79_setup_macs()
 		wan_mac=$(mtd_get_mac_ascii hwconfig "HW.WAN.MAC.Address")
 		label_mac=$wan_mac
 		;;
+	elecom,wab-i1750-ps|\
+	elecom,wab-s1167-ps|\
+	elecom,wab-s600-ps|\
 	engenius,ecb1200|\
 	engenius,ecb1750)
 		lan_mac=$(mtd_get_mac_ascii u-boot-env ethaddr)
diff --git a/target/linux/ath79/generic/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac b/target/linux/ath79/generic/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
index 5d74208a..172faa8b 100644
--- a/target/linux/ath79/generic/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
+++ b/target/linux/ath79/generic/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
@@ -35,6 +35,16 @@ case "$board" in
 		[ "$PHYNBR" -eq 1 ] && \
 			mtd_get_mac_ascii bdcfg "wlanmac" > /sys${DEVPATH}/macaddress
 		;;
+	elecom,wab-i1750-ps|\
+	elecom,wab-s1167-ps|\
+	elecom,wab-s600-ps)
+		# set the 5G MAC address (= ethaddr + 1)
+		[ "$PHYNBR" -eq 0 ] && \
+			macaddr_add "$(mtd_get_mac_ascii u-boot-env ethaddr)" 1 > /sys${DEVPATH}/macaddress
+		# set the 2.4G MAC address (= ethaddr)
+		[ "$PHYNBR" -eq 1 ] && \
+			mtd_get_mac_ascii u-boot-env "ethaddr" > /sys${DEVPATH}/macaddress
+		;;
 	engenius,epg5000|\
 	engenius,esr1200|\
 	engenius,esr1750|\
diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index 1a558c30..08daf22f 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -11,6 +11,7 @@ DEVICE_VARS += KERNEL_INITRAMFS_PREFIX DAP_SIGNATURE
 DEVICE_VARS += EDIMAX_HEADER_MAGIC EDIMAX_HEADER_MODEL
 DEVICE_VARS += OPENMESH_CE_TYPE ZYXEL_MODEL_STRING
 DEVICE_VARS += SUPPORTED_TELTONIKA_DEVICES
+DEVICE_VARS += ELECOM_HWID
 
 define Build/addpattern
 	-$(STAGING_DIR_HOST)/bin/addpattern -B $(ADDPATTERN_ID) \
@@ -1193,6 +1194,40 @@ define Device/dlink_dir-869-a1
 endef
 TARGET_DEVICES += dlink_dir-869-a1
 
+define Device/elecom_wab
+  DEVICE_VENDOR := ELECOM
+  IMAGE_SIZE := 14336k
+  IMAGES += factory.bin
+  IMAGE/factory.bin := append-kernel | pad-to $$$$(BLOCKSIZE) | append-rootfs | \
+	pad-rootfs | check-size | elx-header $$$$(ELECOM_HWID) 8844A2D168B45A2D
+  DEVICE_PACKAGES := kmod-ath10k-ct ath10k-firmware-qca988x-ct kmod-gpio-beeper \
+	kmod-usb2 kmod-usb-ledtrig-usbport
+endef
+
+define Device/elecom_wab-i1750-ps
+  $(Device/elecom_wab)
+  SOC := qca9558
+  DEVICE_MODEL := WAB-I1750-PS
+  ELECOM_HWID := 0107000d
+endef
+TARGET_DEVICES += elecom_wab-i1750-ps
+
+define Device/elecom_wab-s1167-ps
+  $(Device/elecom_wab)
+  SOC := qca9557
+  DEVICE_MODEL := WAB-S1167-PS
+  ELECOM_HWID := 0107000c
+endef
+TARGET_DEVICES += elecom_wab-s1167-ps
+
+define Device/elecom_wab-s600-ps
+  $(Device/elecom_wab)
+  SOC := qca9557
+  DEVICE_MODEL := WAB-S600-PS
+  ELECOM_HWID := 01070028
+endef
+TARGET_DEVICES += elecom_wab-s600-ps
+
 define Device/elecom_wrc-1750ghbk2-i
   SOC := qca9563
   DEVICE_VENDOR := ELECOM

Note: This code is based on musashino205's pull request on openwrt/openwrt/pull/14706, and some modifications by me.

This patch applies for v23.05.2 tag.