bmips: add support for Sercomm SHG2500

Sercomm SHG2500 is a BCM63168 with 128M of RAM, 256M of NAND, an external
BCM53124S switch for the LAN ports and internal/external Broadcom wifi.
LEDs are connected to an external MSP430G2513 MCU controlled via SPI.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

6 files changed, 776 insertions, 1 deletions

diff --git a/target/linux/bmips/dts/bcm63168-sercomm-shg2500.dts b/target/linux/bmips/dts/bcm63168-sercomm-shg2500.dts
new file mode 100644
index 0000000000..76bedfac94
--- /dev/null
+++ b/target/linux/bmips/dts/bcm63168-sercomm-shg2500.dts
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "bcm63268.dtsi"
+
+/ {
+	model = "Sercomm SHG2500";
+	compatible = "sercomm,shg2500", "brcm,bcm63168", "brcm,bcm63268";
+
+	aliases {
+		led-boot = &led_power_red;
+		led-failsafe = &led_power_red;
+		led-running = &led_power_red;
+		led-upgrade = &led_power_red;
+
+		led-internet = &led_internet_green;
+		led-usb = &led_modem_green;
+		led-wireless = &led_wireless_green;
+	};
+
+	i2c {
+		compatible = "i2c-gpio";
+		sda-gpios = <&gpio 14 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpio 9 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+
+	keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <20>;
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 34 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+			debounce-interval = <60>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 35 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+			debounce-interval = <60>;
+		};
+	};
+};
+
+&ehci {
+	status = "okay";
+};
+
+&ethernet {
+	status = "okay";
+
+	nvmem-cells = <&macaddr_cferom_6a0>;
+	nvmem-cell-names = "mac-address";
+};
+
+&hsspi {
+	status = "okay";
+
+	led-controller@1 {
+		compatible = "sercomm,msp430-leds";
+		reg = <1>;
+		spi-max-frequency = <500000>;
+
+		led@1 {
+			reg = <1>;
+			label = "red:modem";
+		};
+
+		led_modem_green: led@2 {
+			reg = <2>;
+			label = "green:modem";
+		};
+
+		led@3 {
+			reg = <3>;
+			label = "blue:modem";
+		};
+
+		led@4 {
+			reg = <4>;
+			label = "red:internet";
+		};
+
+		led@5 {
+			reg = <5>;
+			label = "red:phone";
+		};
+
+		led@6 {
+			reg = <6>;
+			label = "green:phone";
+		};
+
+		led_wireless_green: led@7 {
+			reg = <7>;
+			label = "green:wifi";
+		};
+
+		led_power_red: led@8 {
+			reg = <8>;
+			label = "red:power";
+		};
+
+		led_internet_green: led@9 {
+			reg = <9>;
+			label = "green:internet";
+		};
+	};
+};
+
+&mdio_int {
+	phy12: ethernet-phy@c {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <12>;
+	};
+};
+
+&mdio_ext {
+	switch@1e {
+		compatible = "brcm,bcm53125";
+		reg = <30>;
+
+		dsa,member = <1 0>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@1 {
+				reg = <1>;
+				label = "lan1";
+			};
+
+			port@2 {
+				reg = <2>;
+				label = "lan2";
+			};
+
+			port@3 {
+				reg = <3>;
+				label = "lan3";
+			};
+
+			port@4 {
+				reg = <4>;
+				label = "lan4";
+			};
+
+			port@8 {
+				reg = <8>;
+
+				phy-mode = "rgmii";
+				ethernet = <&switch0port4>;
+
+				fixed-link {
+					speed = <1000>;
+					full-duplex;
+				};
+			};
+		};
+	};
+};
+
+&nflash {
+	status = "okay";
+
+	nandcs@0 {
+		compatible = "brcm,nandcs";
+		reg = <0>;
+		nand-ecc-step-size = <512>;
+		nand-ecc-strength = <15>;
+		nand-on-flash-bbt;
+		brcm,nand-oob-sector-size = <64>;
+
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			cferom: partition@0 {
+				label = "cferom";
+				reg = <0x0000000 0x0020000>;
+				read-only;
+			};
+
+			partition@20000 {
+				label = "part_map";
+				reg = <0x0020000 0x00a0000>;
+				read-only;
+			};
+
+			partition@c0000 {
+				label = "cferam1";
+				reg = <0x00c0000 0x0140000>;
+				read-only;
+			};
+
+			partition@200000 {
+				label = "cferam2";
+				reg = <0x0200000 0x0140000>;
+				read-only;
+			};
+
+			artition@6920000 {
+				label = "bootflag1";
+				reg = <0x6920000 0x0140000>;
+			};
+
+			partition@6a60000 {
+				label = "bootflag2";
+				reg = <0x6a60000 0x0140000>;
+			};
+
+			partition@520000 {
+				compatible = "sercomm,wfi";
+				label = "wfi";
+				reg = <0x0520000 0x6400000>;
+			};
+
+			partition@6ba0000 {
+				label = "xml_cfg";
+				reg = <0x6ba0000 0x0280000>;
+				read-only;
+			};
+
+			partition@6e20000 {
+				label = "app_data";
+				reg = <0x6e20000 0x0280000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&ohci {
+	status = "okay";
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pinctrl {
+	pinctrl_uart1: uart1-pins {
+		pinctrl_uart1_sdin: uart1_sdin {
+			function = "uart1_sdin";
+			pins = "gpio12";
+		};
+
+		pinctrl_uart1_sdout: uart1_sdout {
+			function = "uart1_sdout";
+			pins = "gpio13";
+		};
+	};
+};
+
+&switch0 {
+	dsa,member = <0 0>;
+
+	ports {
+		port@3 {
+			reg = <3>;
+			label = "wan";
+
+			phy-handle = <&phy12>;
+			phy-mode = "gmii";
+		};
+
+		switch0port4: port@4 {
+			reg = <4>;
+			label = "extsw";
+
+			phy-mode = "rgmii";
+
+			fixed-link {
+				speed = <1000>;
+				full-duplex;
+			};
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart1 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart1>;
+};
+
+&usbh {
+	status = "okay";
+};
+
+&cferom {
+	compatible = "nvmem-cells";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	macaddr_cferom_6a0: macaddr@6a0 {
+		reg = <0x6a0 0x6>;
+	};
+};
diff --git a/target/linux/bmips/files/drivers/leds/leds-sercomm-msp430.c b/target/linux/bmips/files/drivers/leds/leds-sercomm-msp430.c
new file mode 100644
index 0000000000..5409142989
--- /dev/null
+++ b/target/linux/bmips/files/drivers/leds/leds-sercomm-msp430.c
@@ -0,0 +1,380 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for Sercomm MSP430G2513 LEDs.
+ *
+ * Copyright 2023 Álvaro Fernández Rojas <noltari@gmail.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/spi/spi.h>
+#include "leds.h"
+
+/*
+ * MSP430G2513 SPI protocol description:
+ * +----+----+----+----+----+----+
+ * | b1 | b2 | b3 | b4 | b5 | b6 |
+ * +----+----+----+----+----+----+
+ * 6 bytes TX & RX per transaction.
+ *
+ * LEDs:
+ * MSP430G2513 can control up to 9 LEDs.
+ * b1: LED ID [1,9]
+ * b2: LED function
+ * b3-b6: LED function parameters
+ *
+ * LED functions:
+ * [0] Off
+ * [1] On
+ * [2] Flash
+ *   - b4: delay (x 6ms)
+ *   - b5: repeat (0 = infinite)
+ * [3] Pulse
+ *   - b3: delay (x 6ms)
+ *   - b4: blink while pulsing? (unknown)
+ *   - b5: repeat (0 = infinite)
+ * [4] Pulse On
+ *   - b3: delay (x 6ms)
+ *   - b4: blink while pulsing? (unknown)
+ *   - b5: repeat (0 = infinite)
+ * [5] Pulse Off
+ *   - b3: delay (x 6ms)
+ *   - b4: blink while pulsing? (unknown)
+ *   - b5: repeat (0 = infinite)
+ * [6] Level
+ *   - b3: brightness [0,4]
+ *
+ * MCU Commands (b1 = 0x55):
+ * [0x0a] FW upgrade data
+ *   - b3: Data size (usually 0x40), which is appended to TX & RX.
+ * [0x31] Get MCU version? (unknown)
+ * [0x68] Get MCU work mode
+ * [0xa5] Start FW upgrade
+ * [0xf0] End FW upgrade
+ */
+
+#define MSP430_CMD_BYTES		6
+#define MSP430_CMD_MCU			0x55
+#define MSP430_MCU_WM			0x68
+
+#define MSP430_LED_MIN_ID		1
+#define MSP430_LED_MAX_ID		9
+
+#define MSP430_LED_OFF			0
+#define MSP430_LED_ON			1
+#define MSP430_LED_FLASH		2
+#define MSP430_LED_PULSE		3
+#define MSP430_LED_PULSE_ON		4
+#define MSP430_LED_PULSE_OFF		5
+#define MSP430_LED_LEVEL		6
+
+#define MSP430_LED_BLINK_DEF		500
+#define MSP430_LED_BLINK_MASK		0xff
+#define MSP430_LED_BLINK_MS		6
+#define MSP430_LED_BLINK_MAX		(MSP430_LED_BLINK_MS * \
+					 MSP430_LED_BLINK_MASK)
+
+#define MSP430_LED_BRIGHTNESS_MAX	5
+#define MSP430_LED_REPEAT_MAX		0xff
+
+/**
+ * struct msp430_led - state container for Sercomm MSP430 based LEDs
+ * @cdev: LED class device for this LED
+ * @spi: spi resource
+ * @id: LED ID
+ */
+struct msp430_led {
+	struct led_classdev cdev;
+	struct spi_device *spi;
+	u8 id;
+};
+
+static inline int msp430_cmd(struct spi_device *spi, u8 tx[MSP430_CMD_BYTES],
+			     u8 rx[MSP430_CMD_BYTES])
+{
+	struct device *dev = &spi->dev;
+	int rc;
+
+	memset(rx, 0, MSP430_CMD_BYTES);
+
+	rc = spi_write_then_read(spi, tx, MSP430_CMD_BYTES,
+				  rx, MSP430_CMD_BYTES);
+	if (rc)
+		dev_err(dev, "spi error\n");
+
+	dev_dbg(dev, "msp430_cmd: [%02x %02x %02x %02x %02x %02x]"
+		" -> [%02x %02x %02x %02x %02x %02x]",
+		tx[0], tx[1], tx[2], tx[3], tx[4], tx[5],
+		rx[0], rx[1], rx[2], rx[3], rx[4], rx[5]);
+
+	return rc;
+}
+
+static unsigned long msp430_blink_delay(unsigned long delay)
+{
+	unsigned long msp430_delay;
+
+	msp430_delay = delay + MSP430_LED_BLINK_MS / 2;
+	msp430_delay = msp430_delay / MSP430_LED_BLINK_MS;
+	if (msp430_delay == 0)
+		msp430_delay = 1;
+
+	return msp430_delay;
+}
+
+static int msp430_blink_set(struct led_classdev *led_cdev,
+			    unsigned long *delay_on,
+			    unsigned long *delay_off)
+{
+	struct msp430_led *led =
+		container_of(led_cdev, struct msp430_led, cdev);
+	u8 tx[MSP430_CMD_BYTES] = {led->id, MSP430_LED_FLASH, 0, 0, 0, 0};
+	u8 rx[MSP430_CMD_BYTES];
+	unsigned long delay;
+
+	if (!*delay_on)
+		*delay_on = MSP430_LED_BLINK_DEF;
+	if (!*delay_off)
+		*delay_off = MSP430_LED_BLINK_DEF;
+
+	delay = msp430_blink_delay(*delay_on);
+	if (delay != msp430_blink_delay(*delay_off)) {
+		dev_dbg(led_cdev->dev,
+			"fallback to soft blinking (delay_on != delay_off)\n");
+		return -EINVAL;
+	}
+
+	if (delay > MSP430_LED_BLINK_MASK) {
+		dev_dbg(led_cdev->dev,
+			"fallback to soft blinking (delay > %ums)\n",
+			MSP430_LED_BLINK_MAX);
+		return -EINVAL;
+	}
+
+	tx[3] = delay;
+
+	return msp430_cmd(led->spi, tx, rx);
+}
+
+static int msp430_brightness_set(struct led_classdev *led_cdev,
+				 enum led_brightness brightness)
+{
+	struct msp430_led *led =
+		container_of(led_cdev, struct msp430_led, cdev);
+	u8 tx[MSP430_CMD_BYTES] = {led->id, 0, 0, 0, 0, 0};
+	u8 rx[MSP430_CMD_BYTES];
+	u8 val = (u8) brightness;
+
+	switch (val)
+	{
+	case LED_OFF:
+		tx[1] = MSP430_LED_OFF;
+		break;
+	case MSP430_LED_BRIGHTNESS_MAX:
+		tx[1] = MSP430_LED_ON;
+		break;
+	default:
+		tx[1] = MSP430_LED_LEVEL;
+		tx[2] = val - 1;
+		break;
+	}
+
+	return msp430_cmd(led->spi, tx, rx);
+}
+
+static int msp430_pattern_clear(struct led_classdev *ldev)
+{
+	msp430_brightness_set(ldev, LED_OFF);
+
+	return 0;
+}
+
+static int msp430_pattern_set(struct led_classdev *led_cdev,
+			      struct led_pattern *pattern,
+			      u32 len, int repeat)
+{
+	struct msp430_led *led =
+		container_of(led_cdev, struct msp430_led, cdev);
+	u8 tx[MSP430_CMD_BYTES] = {led->id, 0, 0, 0, 0, 0};
+	u8 rx[MSP430_CMD_BYTES];
+	unsigned long delay0;
+	unsigned long delay1;
+	int rc;
+
+	if (len != 2 ||
+	    repeat > MSP430_LED_REPEAT_MAX ||
+	    pattern[0].delta_t > MSP430_LED_BLINK_MAX ||
+	    pattern[1].delta_t > MSP430_LED_BLINK_MAX)
+		return -EINVAL;
+
+	delay0 = msp430_blink_delay(pattern[0].delta_t);
+	delay1 = msp430_blink_delay(pattern[1].delta_t);
+
+	/* Pulse: <off> <delay> <max> <delay> */
+	if (delay0 == delay1 &&
+	    pattern[0].brightness == LED_OFF &&
+	    pattern[1].brightness == MSP430_LED_BRIGHTNESS_MAX)
+	{
+		tx[1] = MSP430_LED_PULSE;
+		tx[2] = delay0;
+		tx[4] = (u8) repeat;
+	}
+
+	/* Pulse On: <off> <delay> <max> <0ms> */
+	if (pattern[0].delta_t != 0 &&
+	    pattern[1].delta_t == 0 &&
+	    pattern[0].brightness == LED_OFF &&
+	    pattern[1].brightness == MSP430_LED_BRIGHTNESS_MAX) {
+		tx[1] = MSP430_LED_PULSE_ON;
+		tx[2] = delay0;
+		tx[4] = (u8) repeat;
+	}
+
+	/* Pulse Off: <max> <delay> <off> <0ms> */
+	if (pattern[0].delta_t != 0 &&
+	    pattern[1].delta_t == 0 &&
+	    pattern[0].brightness == MSP430_LED_BRIGHTNESS_MAX &&
+	    pattern[1].brightness == LED_OFF) {
+		tx[1] = MSP430_LED_PULSE_OFF;
+		tx[2] = delay0;
+		tx[4] = (u8) repeat;
+	}
+
+	if (!tx[1])
+		return -EINVAL;
+
+	rc = msp430_cmd(led->spi, tx, rx);
+	if (rc)
+		return rc;
+
+	return 0;
+}
+
+static int msp430_led(struct spi_device *spi, struct device_node *nc, u8 id)
+{
+	struct device *dev = &spi->dev;
+	struct led_init_data init_data = {};
+	struct msp430_led *led;
+	enum led_default_state state;
+	int rc;
+
+	led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+	if (!led)
+		return -ENOMEM;
+
+	led->id = id;
+	led->spi = spi;
+
+	init_data.fwnode = of_fwnode_handle(nc);
+
+	state = led_init_default_state_get(init_data.fwnode);
+	switch (state) {
+	case LEDS_DEFSTATE_ON:
+		led->cdev.brightness = MSP430_LED_BRIGHTNESS_MAX;
+		break;
+	default:
+		led->cdev.brightness = LED_OFF;
+		break;
+	}
+
+	msp430_brightness_set(&led->cdev, led->cdev.brightness);
+
+	led->cdev.blink_set = msp430_blink_set;
+	led->cdev.brightness_set_blocking = msp430_brightness_set;
+	led->cdev.max_brightness = MSP430_LED_BRIGHTNESS_MAX;
+	led->cdev.pattern_clear = msp430_pattern_clear;
+	led->cdev.pattern_set = msp430_pattern_set;
+
+	rc = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
+	if (rc < 0)
+		return rc;
+
+	dev_dbg(dev, "registered LED %s\n", led->cdev.name);
+
+	return 0;
+}
+
+static inline int msp430_check_workmode(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	u8 tx[MSP430_CMD_BYTES] = {MSP430_CMD_MCU, MSP430_MCU_WM, 0, 0, 0, 0};
+	u8 rx[MSP430_CMD_BYTES];
+	int rc;
+
+	rc = msp430_cmd(spi, tx, rx);
+	if (rc)
+		return rc;
+
+	if ((rx[3] == 0xA5 && rx[4] == 'Z') ||
+	    (rx[4] == 0xA5 && rx[5] == 'Z') ||
+	    (rx[4] == '\b' && rx[5] == '\n')) {
+		dev_err(dev, "invalid workmode: "
+			"[%02x %02x %02x %02x %02x %02x]\n",
+			rx[0], rx[1], rx[2], rx[3], rx[4], rx[5]);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int msp430_leds_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct device_node *np = dev_of_node(dev);
+	struct device_node *child;
+	int rc;
+
+	rc = msp430_check_workmode(spi);
+	if (rc)
+		return rc;
+
+	for_each_available_child_of_node(np, child) {
+		u32 reg;
+
+		if (of_property_read_u32(child, "reg", &reg))
+			continue;
+
+		if (reg < MSP430_LED_MIN_ID || reg > MSP430_LED_MAX_ID) {
+			dev_err(dev, "invalid LED (%u) [%d, %d]\n", reg,
+				MSP430_LED_MIN_ID, MSP430_LED_MAX_ID);
+			continue;
+		}
+
+		rc = msp430_led(spi, child, reg);
+		if (rc < 0) {
+			of_node_put(child);
+			return rc;
+		}
+	}
+
+	return 0;
+}
+
+static const struct of_device_id msp430_leds_of_match[] = {
+	{ .compatible = "sercomm,msp430-leds", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, msp430_leds_of_match);
+
+static const struct spi_device_id msp430_leds_id_table[] = {
+	{ "msp430-leds", 0 },
+	{ }
+};
+
+static struct spi_driver msp430_leds_driver = {
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.of_match_table = msp430_leds_of_match,
+	},
+	.id_table = msp430_leds_id_table,
+	.probe = msp430_leds_probe,
+};
+
+module_spi_driver(msp430_leds_driver);
+
+MODULE_AUTHOR("Álvaro Fernández Rojas <noltari@gmail.com>");
+MODULE_DESCRIPTION("LED driver for Sercomm MSP430 controllers");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:leds-sercomm-msp430");
diff --git a/target/linux/bmips/image/bcm63xx_nand.mk b/target/linux/bmips/image/bcm63xx_nand.mk
index 89b634c8d1..faed7a0919 100644
--- a/target/linux/bmips/image/bcm63xx_nand.mk
+++ b/target/linux/bmips/image/bcm63xx_nand.mk
@@ -141,3 +141,23 @@ define Device/sercomm_h500-s-vfes
   SERCOMM_SWVER := 3417
 endef
 TARGET_DEVICES += sercomm_h500-s-vfes
+
+define Device/sercomm_shg2500
+  $(Device/sercomm-nand)
+  DEVICE_VENDOR := Sercomm
+  DEVICE_MODEL := SHG2500
+  DEVICE_LOADADDR := $(KERNEL_LOADADDR)
+  KERNEL := kernel-bin | append-dtb | lzma | cfe-jffs2-kernel
+  CHIP_ID := 63268
+  SOC := bcm63168
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  SUBPAGESIZE := 512
+  VID_HDR_OFFSET := 2048
+  DEVICE_PACKAGES += $(USB2_PACKAGES) kmod-i2c-gpio \
+    kmod-leds-sercomm-msp430
+  SERCOMM_FSVER := 1001
+  SERCOMM_HWVER := 1424e4a
+  SERCOMM_SWVER := 3207
+endef
+TARGET_DEVICES += sercomm_shg2500
diff --git a/target/linux/bmips/modules.mk b/target/linux/bmips/modules.mk
new file mode 100644
index 0000000000..8f4b344357
--- /dev/null
+++ b/target/linux/bmips/modules.mk
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+define KernelPackage/leds-sercomm-msp430
+  SUBMENU:=$(LEDS_MENU)
+  TITLE:=Sercomm MSP430G2513 LED support
+  KCONFIG:=CONFIG_LEDS_SERCOMM_MSP430
+  FILES:=$(LINUX_DIR)/drivers/leds/leds-sercomm-msp430.ko
+  DEPENDS:=@TARGET_bmips +kmod-ledtrig-pattern
+  AUTOLOAD:=$(call AutoLoad,60,leds-sercomm-msp430,1)
+endef
+
+define KernelPackage/leds-sercomm-msp430/description
+  Kernel support for the Sercomm MSP430G2513 SPI LED controller.
+endef
+
+$(eval $(call KernelPackage,leds-sercomm-msp430))
diff --git a/target/linux/bmips/nand/base-files/etc/board.d/02_network b/target/linux/bmips/nand/base-files/etc/board.d/02_network
index b2a340ecf8..0e130103da 100644
--- a/target/linux/bmips/nand/base-files/etc/board.d/02_network
+++ b/target/linux/bmips/nand/base-files/etc/board.d/02_network
@@ -10,7 +10,8 @@ comtrend,vr-3032u)
 	ucidef_set_interface_lan "lan1 lan2 lan3 lan4"
 	;;
 huawei,hg253s-v2 |\
-netgear,dgnd3700-v2)
+netgear,dgnd3700-v2 |\
+sercomm,shg2500)
 	ucidef_set_bridge_device switch
 	ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" "wan"
 	;;
diff --git a/target/linux/bmips/patches-5.15/700-leds-add-support-for-Sercomm-MSP430-LED-controller.patch b/target/linux/bmips/patches-5.15/700-leds-add-support-for-Sercomm-MSP430-LED-controller.patch
new file mode 100644
index 0000000000..eeeb8d1ae0
--- /dev/null
+++ b/target/linux/bmips/patches-5.15/700-leds-add-support-for-Sercomm-MSP430-LED-controller.patch
@@ -0,0 +1,46 @@
+From 1a5f2263d388016c88d39e141c7eb8085c9313fc Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
+Date: Wed, 5 Apr 2023 08:07:00 +0200
+Subject: [PATCH] leds: add support for Sercomm MSP430 LED controller
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Sercomm added an external MSP430G2513 for controlling LEDs through SPI on some
+boards.
+
+Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
+---
+ drivers/leds/Kconfig  | 9 +++++++++
+ drivers/leds/Makefile | 1 +
+ drivers/spi/spidev.c  | 2 ++
+ 3 files changed, 12 insertions(+)
+
+--- a/drivers/leds/Kconfig
++++ b/drivers/leds/Kconfig
+@@ -288,6 +288,15 @@ config LEDS_COBALT_RAQ
+ 	help
+ 	  This option enables support for the Cobalt Raq series LEDs.
+ 
++config LEDS_SERCOMM_MSP430
++	tristate "LED support for Sercomm MSP430 SPI LED controllers"
++	depends on LEDS_CLASS
++	depends on SPI
++	depends on OF
++	help
++          This option enables support for the Sercomm MSP430G2513 SPI LED
++	  controllers.
++
+ config LEDS_SUNFIRE
+ 	tristate "LED support for SunFire servers."
+ 	depends on LEDS_CLASS
+--- a/drivers/leds/Makefile
++++ b/drivers/leds/Makefile
+@@ -77,6 +77,7 @@ obj-$(CONFIG_LEDS_PWM)			+= leds-pwm.o
+ obj-$(CONFIG_LEDS_REGULATOR)		+= leds-regulator.o
+ obj-$(CONFIG_LEDS_S3C24XX)		+= leds-s3c24xx.o
+ obj-$(CONFIG_LEDS_SC27XX_BLTC)		+= leds-sc27xx-bltc.o
++obj-$(CONFIG_LEDS_SERCOMM_MSP430)	+= leds-sercomm-msp430.o
+ obj-$(CONFIG_LEDS_SUNFIRE)		+= leds-sunfire.o
+ obj-$(CONFIG_LEDS_SYSCON)		+= leds-syscon.o
+ obj-$(CONFIG_LEDS_TCA6507)		+= leds-tca6507.o