--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "rtl839x.dtsi"
+
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+ compatible = "tplink,sg2452p-v4", "realtek,rtl8393-soc";
+ model = "TP-Link SG2452P v4";
+
+ memory@0 {
+ device_type = "memory";
+ reg = <0x0 0x10000000>;
+ };
+
+ aliases {
+ led-boot = &led_sys;
+ led-failsafe = &led_sys;
+ led-running = &led_sys;
+ led-upgrade = &led_sys;
+ };
+
+ chosen {
+ bootargs = "console=ttyS0,38400";
+ };
+
+ keys {
+ compatible = "gpio-keys";
+
+ reset {
+ label = "reset";
+ gpios = <&gpio0 20 GPIO_ACTIVE_LOW>;
+ linux,code = <KEY_RESTART>;
+ };
+
+ speed {
+ label = "speed";
+ gpios = <&gpio0 19 GPIO_ACTIVE_LOW>;
+ linux,code = <BTN_0>;
+ };
+ };
+
+ gpio_fan_sys {
+ compatible = "gpio-fan";
+ alarm-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+ };
+
+ gpio_fan_psu_1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&disable_jtag>;
+ compatible = "gpio-fan";
+
+ alarm-gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
+ gpios = <&gpio0 4 GPIO_ACTIVE_LOW>;
+ /* the actual speeds (rpm) are unknown, just use dummy values */
+ gpio-fan,speed-map = <1 0>, <2 1>;
+ #cooling-cells = <2>;
+ };
+
+ gpio_fan_psu_2 {
+ /* This fan runs in parallel to PSU1 fan, but has a separate
+ * alarm GPIO. This is not (yet) supported by the gpio-fan driver,
+ * so a separate instance is added
+ */
+ compatible = "gpio-fan";
+ alarm-gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
+ };
+
+ leds {
+ pinctrl-names = "default";
+ compatible = "gpio-leds";
+
+ led-0 {
+ label = "green:speed";
+ gpios = <&gpio0 8 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_INDICATOR;
+ };
+
+ led-1 {
+ label = "green:poe";
+ gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_INDICATOR;
+ };
+
+ led_sys: led-2 {
+ label = "green:sys";
+ gpios = <&gpio0 13 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_STATUS;
+ };
+
+ led-3 {
+ label = "green:fan";
+ gpios = <&gpio0 15 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_STATUS;
+ };
+
+ led-4 {
+ label = "amber:fan";
+ gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_AMBER>;
+ function = "fault-fan";
+ };
+
+ led-5 {
+ label = "green:poe-max";
+ gpios = <&gpio0 18 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = "alarm-poe";
+ };
+ };
+
+ i2c-gpio-0 {
+ compatible = "i2c-gpio";
+ sda-gpios = <&gpio0 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ scl-gpios = <&gpio0 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ i2c-gpio,delay-us = <2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /* LAN9 - LAN12 */
+ tps23861@5 {
+ compatible = "ti,tps23861";
+ reg = <0x05>;
+ };
+
+ /* LAN17 - LAN20 */
+ tps23861@6 {
+ compatible = "ti,tps23861";
+ reg = <0x06>;
+ };
+
+ /* LAN45 - LAN48 */
+ tps23861@9 {
+ compatible = "ti,tps23861";
+ reg = <0x09>;
+ };
+
+ /* LAN37 - LAN40 */
+ tps23861@a {
+ compatible = "ti,tps23861";
+ reg = <0x0a>;
+ };
+
+ /* LAN1 - LAN4 */
+ tps23861@14 {
+ compatible = "ti,tps23861";
+ reg = <0x14>;
+ };
+
+ /* LAN25 - LAN28 */
+ tps23861@24 {
+ compatible = "ti,tps23861";
+ reg = <0x24>;
+ };
+
+ /* LAN33 - LAN 36 */
+ tps23861@25 {
+ compatible = "ti,tps23861";
+ reg = <0x25>;
+ };
+
+ /* LAN41 - LAN44 */
+ tps23861@26 {
+ compatible = "ti,tps23861";
+ reg = <0x26>;
+ };
+
+ /* LAN13 - LAN16 */
+ tps23861@29 {
+ compatible = "ti,tps23861";
+ reg = <0x29>;
+ };
+
+ /* LAN29 - LAN32 */
+ tps23861@2c {
+ compatible = "ti,tps23861";
+ reg = <0x2c>;
+ };
+
+ /* LAN5 - LAN8 */
+ tps23861@48 {
+ compatible = "ti,tps23861";
+ reg = <0x48>;
+ };
+
+ /* LAN21 - LAN24 */
+ tps23861@49 {
+ compatible = "ti,tps23861";
+ reg = <0x49>;
+ };
+ };
+
+ gpio-restart {
+ compatible = "gpio-restart";
+ gpios = <&gpio0 17 GPIO_ACTIVE_LOW>;
+ };
+};
+
+&gpio0 {
+ poe-enable {
+ gpio-hog;
+ gpios = <23 GPIO_ACTIVE_HIGH>;
+ output-high;
+ line-name = "poe-enable";
+ };
+};
+
+&spi0 {
+ status = "okay";
+ flash@0 {
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <10000000>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "u-boot";
+ reg = <0x0 0xe0000>;
+ read-only;
+ };
+ partition@e0000 {
+ label = "u-boot-env";
+ reg = <0xe0000 0x20000>;
+ };
+
+ /* We use the "sys", "usrimg1" and "usrimg2" partitions
+ * as firmware since the kernel needs to be in "sys", but the
+ * partition is too small to hold the "rootfs" as well.
+ * The original partition map contains:
+ *
+ * partition@100000 {
+ * label = "sys";
+ * reg = <0x100000 0x600000>;
+ * };
+ * partition@700000 {
+ * label = "usrimg1";
+ * reg = <0x700000 0xa00000>;
+ * };
+ * partition@1100000 {
+ * label = "usrimg2";
+ * reg = <0x1100000 0xa00000>;
+ * };
+ */
+
+ partition@100000 {
+ label = "firmware";
+ reg = <0x100000 0x1a00000>;
+ };
+ partition@1b00000 {
+ label = "usrappfs";
+ reg = <0x1b00000 0x400000>;
+ };
+ partition@1f00000 {
+ label = "para";
+ reg = <0x1f00000 0x100000>;
+ read-only;
+ };
+ };
+ };
+};
+
+ðernet0 {
+ mdio: mdio-bus {
+ compatible = "realtek,rtl838x-mdio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /* External phy RTL8218B #1 */
+ EXTERNAL_PHY(0)
+ EXTERNAL_PHY(1)
+ EXTERNAL_PHY(2)
+ EXTERNAL_PHY(3)
+ EXTERNAL_PHY(4)
+ EXTERNAL_PHY(5)
+ EXTERNAL_PHY(6)
+ EXTERNAL_PHY(7)
+
+ /* External phy RTL8218B #2 */
+ EXTERNAL_PHY(8)
+ EXTERNAL_PHY(9)
+ EXTERNAL_PHY(10)
+ EXTERNAL_PHY(11)
+ EXTERNAL_PHY(12)
+ EXTERNAL_PHY(13)
+ EXTERNAL_PHY(14)
+ EXTERNAL_PHY(15)
+
+ /* External phy RTL8218B #3 */
+ EXTERNAL_PHY(16)
+ EXTERNAL_PHY(17)
+ EXTERNAL_PHY(18)
+ EXTERNAL_PHY(19)
+ EXTERNAL_PHY(20)
+ EXTERNAL_PHY(21)
+ EXTERNAL_PHY(22)
+ EXTERNAL_PHY(23)
+
+ /* External phy RTL8218B #4 */
+ EXTERNAL_PHY(24)
+ EXTERNAL_PHY(25)
+ EXTERNAL_PHY(26)
+ EXTERNAL_PHY(27)
+ EXTERNAL_PHY(28)
+ EXTERNAL_PHY(29)
+ EXTERNAL_PHY(30)
+ EXTERNAL_PHY(31)
+
+ /* External phy RTL8218B #5 */
+ EXTERNAL_PHY(32)
+ EXTERNAL_PHY(33)
+ EXTERNAL_PHY(34)
+ EXTERNAL_PHY(35)
+ EXTERNAL_PHY(36)
+ EXTERNAL_PHY(37)
+ EXTERNAL_PHY(38)
+ EXTERNAL_PHY(39)
+
+ /* External phy RTL8218B #6 */
+ EXTERNAL_PHY(40)
+ EXTERNAL_PHY(41)
+ EXTERNAL_PHY(42)
+ EXTERNAL_PHY(43)
+ EXTERNAL_PHY(44)
+ EXTERNAL_PHY(45)
+ EXTERNAL_PHY(46)
+ EXTERNAL_PHY(47)
+ };
+};
+
+&switch0 {
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ SWITCH_PORT(0, 01, qsgmii)
+ SWITCH_PORT(1, 02, qsgmii)
+ SWITCH_PORT(2, 03, qsgmii)
+ SWITCH_PORT(3, 04, qsgmii)
+ SWITCH_PORT(4, 05, qsgmii)
+ SWITCH_PORT(5, 06, qsgmii)
+ SWITCH_PORT(6, 07, qsgmii)
+ SWITCH_PORT(7, 08, qsgmii)
+
+ SWITCH_PORT(8, 09, qsgmii)
+ SWITCH_PORT(9, 10, qsgmii)
+ SWITCH_PORT(10, 11, qsgmii)
+ SWITCH_PORT(11, 12, qsgmii)
+ SWITCH_PORT(12, 13, qsgmii)
+ SWITCH_PORT(13, 14, qsgmii)
+ SWITCH_PORT(14, 15, qsgmii)
+ SWITCH_PORT(15, 16, qsgmii)
+
+ SWITCH_PORT(16, 17, qsgmii)
+ SWITCH_PORT(17, 18, qsgmii)
+ SWITCH_PORT(18, 19, qsgmii)
+ SWITCH_PORT(19, 20, qsgmii)
+ SWITCH_PORT(20, 21, qsgmii)
+ SWITCH_PORT(21, 22, qsgmii)
+ SWITCH_PORT(22, 23, qsgmii)
+ SWITCH_PORT(23, 24, qsgmii)
+
+ SWITCH_PORT(24, 25, qsgmii)
+ SWITCH_PORT(25, 26, qsgmii)
+ SWITCH_PORT(26, 27, qsgmii)
+ SWITCH_PORT(27, 28, qsgmii)
+ SWITCH_PORT(28, 29, qsgmii)
+ SWITCH_PORT(29, 30, qsgmii)
+ SWITCH_PORT(30, 31, qsgmii)
+ SWITCH_PORT(31, 32, qsgmii)
+
+ SWITCH_PORT(32, 33, qsgmii)
+ SWITCH_PORT(33, 34, qsgmii)
+ SWITCH_PORT(34, 35, qsgmii)
+ SWITCH_PORT(35, 36, qsgmii)
+ SWITCH_PORT(36, 37, qsgmii)
+ SWITCH_PORT(37, 38, qsgmii)
+ SWITCH_PORT(38, 39, qsgmii)
+ SWITCH_PORT(39, 40, qsgmii)
+
+ SWITCH_PORT(40, 41, qsgmii)
+ SWITCH_PORT(41, 42, qsgmii)
+ SWITCH_PORT(42, 43, qsgmii)
+ SWITCH_PORT(43, 44, qsgmii)
+ SWITCH_PORT(44, 45, qsgmii)
+ SWITCH_PORT(45, 46, qsgmii)
+ SWITCH_PORT(46, 47, qsgmii)
+ SWITCH_PORT(47, 48, qsgmii)
+
+ /* CPU-Port */
+ port@52 {
+ ethernet = <ðernet0>;
+ reg = <52>;
+ phy-mode = "internal";
+
+ fixed-link {
+ speed = <1000>;
+ full-duplex;
+ };
+ };
+ };
+};