diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index 0080400..1534a54 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -160,6 +160,7 @@
 	default 0x1 if BOARD_GOOGLE_AURASH
 	default 0x1 if BOARD_GOOGLE_HADES
 	default 0x0 if BOARD_GOOGLE_YAVILLA
+	default 0x0 if BOARD_GOOGLE_ULDREN
 
 config DRIVER_TPM_I2C_ADDR
 	hex
diff --git a/src/mainboard/google/brya/Kconfig.name b/src/mainboard/google/brya/Kconfig.name
index 706fdfd..fb8bb5e 100644
--- a/src/mainboard/google/brya/Kconfig.name
+++ b/src/mainboard/google/brya/Kconfig.name
@@ -361,6 +361,8 @@
 config BOARD_GOOGLE_ULDREN
 	bool "->  Uldren"
 	select BOARD_GOOGLE_BASEBOARD_NISSA
+	select DRIVERS_I2C_CS42L42
+	select HAVE_WWAN_POWER_SEQUENCE
 
 config BOARD_GOOGLE_YAVILLA
 	bool "->  Yavilla"
diff --git a/src/mainboard/google/brya/variants/uldren/include/variant/gpio.h b/src/mainboard/google/brya/variants/uldren/include/variant/gpio.h
index c4fe342..c96b01f 100644
--- a/src/mainboard/google/brya/variants/uldren/include/variant/gpio.h
+++ b/src/mainboard/google/brya/variants/uldren/include/variant/gpio.h
@@ -5,4 +5,8 @@
 
 #include <baseboard/gpio.h>
 
+#define WWAN_FCPO	GPP_D6
+#define WWAN_RST	GPP_F12
+#define T2_OFF_MS	20
+
 #endif
diff --git a/src/mainboard/google/brya/variants/uldren/overridetree.cb b/src/mainboard/google/brya/variants/uldren/overridetree.cb
index 4f2c04a..dbe46ed 100644
--- a/src/mainboard/google/brya/variants/uldren/overridetree.cb
+++ b/src/mainboard/google/brya/variants/uldren/overridetree.cb
@@ -1,6 +1,316 @@
 chip soc/intel/alderlake
+	register "sagv" = "SaGv_Enabled"
 
-        device domain 0 on
+	# SOC Aux orientation override:
+	# This is a bitfield that corresponds to up to 4 TCSS ports.
+	# Bits (0,1) allocated for TCSS Port1 configuration and Bits (2,3)for TCSS Port2.
+	# TcssAuxOri = 0101b
+	# Bit0,Bit2 set to "1" indicates no retimer on USBC Ports
+	# Bit1,Bit3 set to "0" indicates Aux lines are not swapped on the
+	# motherboard to USBC connector
+
+	register "tcss_aux_ori" = "5"
+	register "typec_aux_bias_pads[0]" = "{.pad_auxp_dc = GPP_E22, .pad_auxn_dc = GPP_E23}"
+	register "typec_aux_bias_pads[1]" = "{.pad_auxp_dc = GPP_A21, .pad_auxn_dc = GPP_A22}"
+
+	register "usb2_ports[6]" = "USB2_PORT_MID(OC_SKIP)"	# World Facing Camera
+	register "usb2_ports[9]" = "USB2_PORT_MID(OC_SKIP)"	# Bluetooth port for CNVi WLAN
+
+	register "serial_io_i2c_mode" = "{
+		[PchSerialIoIndexI2C0] = PchSerialIoPci,
+		[PchSerialIoIndexI2C1] = PchSerialIoPci,
+		[PchSerialIoIndexI2C2] = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C3] = PchSerialIoPci,
+		[PchSerialIoIndexI2C4] = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C5] = PchSerialIoPci,
+	}"
+
+	# Intel Common SoC Config
+	#+-------------------+---------------------------+
+	#| Field             |  Value                    |
+	#+-------------------+---------------------------+
+	#| I2C0              | TPM. Early init is        |
+	#|                   | required to set up a BAR  |
+	#|                   | for TPM communication     |
+	#| I2C1              | Touchscreen               |
+	#| I2C2              |                           |
+	#| I2C3              | Audio                     |
+	#| I2C5              | Trackpad                  |
+	#+-------------------+---------------------------+
+	register "common_soc_config" = "{
+		.i2c[0] = {
+			.early_init = 1,
+			.speed = I2C_SPEED_FAST_PLUS,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST_PLUS,
+				.scl_lcnt = 55,
+				.scl_hcnt = 30,
+				.sda_hold = 7,
+			}
+		},
+		.i2c[1] = {
+			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 158,
+				.scl_hcnt = 79,
+				.sda_hold = 7,
+			}
+		},
+		.i2c[3] = {
+			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 158,
+				.scl_hcnt = 79,
+				.sda_hold = 7,
+			}
+		},
+		.i2c[5] = {
+			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 158,
+				.scl_hcnt = 79,
+				.sda_hold = 7,
+			}
+		},
+	}"
+
+	device domain 0 on
+		device ref cnvi_wifi on
+			chip drivers/wifi/generic
+				register "wake" = "GPE0_PME_B0"
+				register "enable_cnvi_ddr_rfim" = "true"
+				device generic 0 on end
+			end
+		end
+		device ref i2c1 on
+			chip drivers/i2c/hid
+				register "generic.hid" = ""WDHT0002""
+				register "generic.desc" = ""WDT Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_C7_IRQ)"
+				register "generic.detect" = "1"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C1)"
+				register "generic.reset_delay_ms" = "20"
+				register "generic.stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C6)"
+				register "generic.stop_delay_ms" = "130"
+				register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)"
+				register "generic.enable_delay_ms" = "1"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x20"
+				device i2c 2c on end
+			end
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0001""
+				register "desc" = ""ELAN Touchscreen""
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_C7_IRQ)"
+				register "detect" = "1"
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C1)"
+				register "reset_delay_ms" = "20"
+				register "reset_off_delay_ms" = "2"
+				register "stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C6)"
+				register "stop_delay_ms" = "280"
+				register "stop_off_delay_ms" = "2"
+				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)"
+				register "enable_delay_ms" = "1"
+				register "has_power_resource" = "1"
+				device i2c 10 on end
+			end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""ELAN900C""
+				register "generic.desc" = ""ELAN Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_C7_IRQ)"
+				register "generic.detect" = "1"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C1)"
+				register "generic.reset_delay_ms" = "300"
+				register "generic.reset_off_delay_ms" = "1"
+				register "generic.stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C6)"
+				register "generic.stop_delay_ms" = "300"
+				register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)"
+				register "generic.enable_delay_ms" = "6"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x01"
+				device i2c 16 on end
+			end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""GXTP7996""
+				register "generic.desc" = ""Goodix Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_C7_IRQ)"
+				register "generic.detect" = "1"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C1)"
+				register "generic.reset_delay_ms" = "100"
+				register "generic.stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C6)"
+				register "generic.stop_delay_ms" = "300"
+				register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)"
+				register "generic.enable_delay_ms" = "10"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x01"
+				device i2c 5d on end
+			end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""GTCH7502""
+				register "generic.desc" = ""G2TOUCH Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_C7_IRQ)"
+				register "generic.detect" = "1"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C1)"
+				register "generic.reset_delay_ms" = "100"
+				register "generic.stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C6)"
+				register "generic.stop_delay_ms" = "30"
+				register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)"
+				register "generic.enable_delay_ms" = "30"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x01"
+				device i2c 40 on end
+			end
+		end
+		device ref i2c3 on
+			chip drivers/i2c/cs42l42
+				register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_BOTH(GPP_A23)"
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_B15)"
+				register "ts_inv" = "true"
+				register "ts_dbnc_rise" = "RISE_DEB_1000_MS"
+				register "ts_dbnc_fall" = "FALL_DEB_0_MS"
+				register "btn_det_init_dbnce" = "100"
+				register "btn_det_event_dbnce" = "10"
+				register "bias_lvls[0]" = "15"
+				register "bias_lvls[1]" = "8"
+				register "bias_lvls[2]" = "4"
+				register "bias_lvls[3]" = "1"
+				register "hs_bias_ramp_rate" = "HSBIAS_RAMP_SLOW"
+				register "hs_bias_sense_disable" = "true"
+				device i2c 48 on end
+			end
+		end
+		device ref i2c5 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0000""
+				register "desc" = ""ELAN Touchpad""
+				register "irq" = "ACPI_IRQ_WAKE_LEVEL_LOW(GPP_F14_IRQ)"
+				register "wake" = "GPE0_DW2_14"
+				register "detect" = "1"
+				device i2c 15 on end
+			end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""GXTP7863""
+				register "generic.desc" = ""Goodix Touchpad""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_F14_IRQ)"
+				register "generic.wake" = "GPE0_DW2_14"
+				register "generic.detect" = "1"
+				register "hid_desc_reg_offset" = "0x20"
+				device i2c 2c on end
+			end
+		end
+		device ref hda on
+			chip drivers/generic/max98357a
+				register "hid" = ""MX98360A""
+				register "sdmode_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A11)"
+				register "sdmode_delay" = "5"
+				device generic 0 on end
+			end
+		end
+		device ref pch_espi on
+			chip ec/google/chromeec
+				use conn0 as mux_conn[0]
+				use conn1 as mux_conn[1]
+				device pnp 0c09.0 on end
+			end
+		end
+		device ref pmc hidden
+			chip drivers/intel/pmc_mux
+				device generic 0 on
+					chip drivers/intel/pmc_mux/conn
+						use usb2_port1 as usb2_port
+						use tcss_usb3_port1 as usb3_port
+						device generic 0 alias conn0 on end
+					end
+					chip drivers/intel/pmc_mux/conn
+						use usb2_port2 as usb2_port
+						use tcss_usb3_port2 as usb3_port
+						device generic 1 alias conn1 on end
+					end
+				end
+			end
+		end
+		device ref tcss_xhci on
+			chip drivers/usb/acpi
+				device ref tcss_root_hub on
+					chip drivers/usb/acpi
+						register "desc" = ""USB3 Type-C Port C0 (MLB)""
+						register "type" = "UPC_TYPE_C_USB2_SS_SWITCH"
+						register "use_custom_pld" = "true"
+						register "custom_pld" = "ACPI_PLD_TYPE_C(LEFT, LEFT, ACPI_PLD_GROUP(1, 1))"
+						device ref tcss_usb3_port1 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB3 Type-C Port C1 (DB)""
+						register "type" = "UPC_TYPE_C_USB2_SS_SWITCH"
+						register "use_custom_pld" = "true"
+						register "custom_pld" = "ACPI_PLD_TYPE_C(RIGHT, RIGHT, ACPI_PLD_GROUP(2, 1))"
+						device ref tcss_usb3_port2 on end
+					end
+				end
+			end
+		end
+		device ref xhci on
+			chip drivers/usb/acpi
+				device ref xhci_root_hub on
+					chip drivers/usb/acpi
+						register "desc" = ""USB2 Type-C Port C0 (MLB)""
+						register "type" = "UPC_TYPE_C_USB2_SS_SWITCH"
+						register "use_custom_pld" = "true"
+						register "custom_pld" = "ACPI_PLD_TYPE_C(LEFT, LEFT, ACPI_PLD_GROUP(1, 1))"
+						device ref usb2_port1 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB2 Type-C Port C1 (DB)""
+						register "type" = "UPC_TYPE_C_USB2_SS_SWITCH"
+						register "use_custom_pld" = "true"
+						register "custom_pld" = "ACPI_PLD_TYPE_C(RIGHT, RIGHT, ACPI_PLD_GROUP(2, 1))"
+						device ref usb2_port2 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB2 Type-A Port A0 (MLB)""
+						register "type" = "UPC_TYPE_A"
+						register "use_custom_pld" = "true"
+						register "custom_pld" = "ACPI_PLD_TYPE_A(LEFT, RIGHT, ACPI_PLD_GROUP(3, 1))"
+						device ref usb2_port3 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB2 WWAN""
+						register "type" = "UPC_TYPE_INTERNAL"
+						device ref usb2_port4 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB2 User Facing Camera""
+						register "type" = "UPC_TYPE_INTERNAL"
+						device ref usb2_port6 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB2 World Facing Camera""
+						register "type" = "UPC_TYPE_INTERNAL"
+						device ref usb2_port7 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB2 Bluetooth""
+						register "type" = "UPC_TYPE_INTERNAL"
+						register "reset_gpio" =	"ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_D4)"
+						device ref usb2_port10 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB3 Type-A Port A0 (MLB)""
+						register "type" = "UPC_TYPE_USB3_A"
+						register "use_custom_pld" = "true"
+						register "custom_pld" = "ACPI_PLD_TYPE_A(LEFT, RIGHT, ACPI_PLD_GROUP(3, 1))"
+						device ref usb3_port1 on end
+					end
+					chip drivers/usb/acpi
+						register "desc" = ""USB3 WWAN""
+						register "type" = "UPC_TYPE_INTERNAL"
+						device ref usb3_port2 on end
+					end
+				end
+			end
+		end
         end
-
 end