uldren: Initial Zephyr EC image

Create the initial Zephyr EC image for the uldren variant based on
the nereid reference board.

(Auto-Generated by create_zephyr_ec_image.sh version 1.0.0)

BUG=b:271513530
BRANCH=None
TEST=PASS

Change-Id: I46de308cbed951f6637079dff7696ffe9806b6d7
Signed-off-by: mick_hsiao <mick_hsiao@compal.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4340169
Reviewed-by: Elthan Huang <elthan_huang@compal.corp-partner.google.com>
Reviewed-by: Peter Marheine <pmarheine@chromium.org>

18 files changed, 1746 insertions, 1 deletions

diff --git a/zephyr/program/nissa/BUILD.py b/zephyr/program/nissa/BUILD.py
index f101e33728..00e4322473 100644
--- a/zephyr/program/nissa/BUILD.py
+++ b/zephyr/program/nissa/BUILD.py
@@ -4,7 +4,7 @@
 
 """Define zmake projects for nissa."""
 
-# Nivviks and Craask, Pujjo, Xivu, Xivur has NPCX993F, Nereid and Joxer, Yaviks has ITE81302
+# Nivviks and Craask, Pujjo, Xivu, Xivur, Uldren has NPCX993F, Nereid and Joxer, Yaviks has ITE81302
 
 
 def register_nissa_project(
@@ -101,3 +101,8 @@ yaviks = register_nissa_project(
     project_name="yaviks",
     chip="it81302bx",
 )
+
+uldren = register_nissa_project(
+    project_name="uldren",
+    chip="npcx9m3f",
+)
diff --git a/zephyr/program/nissa/CMakeLists.txt b/zephyr/program/nissa/CMakeLists.txt
index 86fc7207dd..0044b05e12 100644
--- a/zephyr/program/nissa/CMakeLists.txt
+++ b/zephyr/program/nissa/CMakeLists.txt
@@ -99,3 +99,13 @@ if(DEFINED CONFIG_BOARD_XIVUR)
 	zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_USBC "xivur/src/usbc.c")
 	zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_CHARGER "xivur/src/charger.c")
 endif()
+if(DEFINED CONFIG_BOARD_ULDREN)
+	project(uldren)
+	zephyr_library_sources(
+			"uldren/src/led.c"
+			"uldren/src/keyboard.c"
+	)
+	zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_FAN "uldren/src/fan.c")
+	zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_USBC "uldren/src/usbc.c")
+	zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_CHARGER "uldren/src/charger.c")
+endif()
diff --git a/zephyr/program/nissa/Kconfig b/zephyr/program/nissa/Kconfig
index 3c5c8915cd..6e23d0a569 100644
--- a/zephyr/program/nissa/Kconfig
+++ b/zephyr/program/nissa/Kconfig
@@ -65,6 +65,12 @@ config BOARD_YAVIKS
 	  Build Google Yaviks board. Yaviks has Intel ADL-N SoC
 	  with IT81302 EC.
 
+config BOARD_ULDREN
+	bool "Google Uldren Board"
+	help
+	  Build Google Uldren reference board. Uldren has Intel ADL-N SoC
+	  with NPCX993FA0BX EC.
+
 
 module = NISSA
 module-str = Nissa board-specific code
diff --git a/zephyr/program/nissa/uldren/cbi.dtsi b/zephyr/program/nissa/uldren/cbi.dtsi
new file mode 100644
index 0000000000..148a7d2e99
--- /dev/null
+++ b/zephyr/program/nissa/uldren/cbi.dtsi
@@ -0,0 +1,10 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/ {
+  /* Uldren-specific fw_config fields. */
+	nissa-fw-config {
+	};
+};
diff --git a/zephyr/program/nissa/uldren/generated.dtsi b/zephyr/program/nissa/uldren/generated.dtsi
new file mode 100644
index 0000000000..91718302b4
--- /dev/null
+++ b/zephyr/program/nissa/uldren/generated.dtsi
@@ -0,0 +1,291 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * This file is auto-generated - do not edit!
+ */
+
+/ {
+
+	named-adc-channels {
+		compatible = "named-adc-channels";
+
+		adc_ec_vsense_pp1050_proc: ec_vsense_pp1050_proc {
+			enum-name = "ADC_PP1050_PROC";
+			io-channels = <&adc0 4>;
+		};
+		adc_ec_vsense_pp3300_s5: ec_vsense_pp3300_s5 {
+			enum-name = "ADC_PP3300_S5";
+			io-channels = <&adc0 6>;
+		};
+		adc_temp_sensor_1: temp_sensor_1 {
+			enum-name = "ADC_TEMP_SENSOR_1";
+			io-channels = <&adc0 0>;
+		};
+		adc_temp_sensor_2: temp_sensor_2 {
+			enum-name = "ADC_TEMP_SENSOR_2";
+			io-channels = <&adc0 1>;
+		};
+		adc_temp_sensor_3: temp_sensor_3 {
+			enum-name = "ADC_TEMP_SENSOR_3";
+			io-channels = <&adc0 10>;
+		};
+	};
+
+	named-gpios {
+		compatible = "named-gpios";
+
+		gpio_acc_int_l: acc_int_l {
+			gpios = <&gpio5 0 GPIO_INPUT>;
+		};
+		gpio_all_sys_pwrgd: all_sys_pwrgd {
+			gpios = <&gpioa 7 GPIO_INPUT>;
+		};
+		gpio_ccd_mode_odl: ccd_mode_odl {
+			gpios = <&gpioe 5 GPIO_INPUT>;
+			enum-name = "GPIO_CCD_MODE_ODL";
+		};
+		gpio_cpu_c10_gate_l: cpu_c10_gate_l {
+			gpios = <&gpio6 7 GPIO_INPUT>;
+		};
+		gpio_ec_battery_pres_odl: ec_battery_pres_odl {
+			gpios = <&gpioa 3 GPIO_INPUT>;
+			enum-name = "GPIO_BATT_PRES_ODL";
+		};
+		gpio_ec_cbi_wp: ec_cbi_wp {
+			gpios = <&gpio7 4 GPIO_OUTPUT>;
+		};
+		gpio_ec_edp_bl_en_od: ec_edp_bl_en_od {
+			gpios = <&gpiod 3 GPIO_ODR_HIGH>;
+			enum-name = "GPIO_ENABLE_BACKLIGHT";
+		};
+		gpio_ec_entering_rw: ec_entering_rw {
+			gpios = <&gpio0 3 GPIO_OUTPUT>;
+			enum-name = "GPIO_ENTERING_RW";
+		};
+		gpio_ec_gsc_packet_mode: ec_gsc_packet_mode {
+			gpios = <&gpio7 5 GPIO_OUTPUT>;
+			enum-name = "GPIO_PACKET_MODE_EN";
+		};
+		gpio_ec_kso_02_inv: ec_kso_02_inv {
+			gpios = <&gpio1 7 (GPIO_OUTPUT_LOW | GPIO_ACTIVE_LOW)>;
+		};
+		gpio_ec_pch_wake_odl: ec_pch_wake_odl {
+			gpios = <&gpiob 0 GPIO_ODR_LOW>;
+		};
+		gpio_ec_prochot_odl: ec_prochot_odl {
+			gpios = <&gpiof 1 GPIO_ODR_HIGH>;
+		};
+		gpio_ec_soc_dsw_pwrok: ec_soc_dsw_pwrok {
+			gpios = <&gpio6 1 GPIO_OUTPUT>;
+		};
+		gpio_ec_soc_hdmi_hpd: ec_soc_hdmi_hpd {
+			gpios = <&gpioe 4 GPIO_OUTPUT>;
+		};
+		gpio_ec_soc_int_odl: ec_soc_int_odl {
+			gpios = <&gpio8 0 GPIO_ODR_HIGH>;
+			enum-name = "GPIO_EC_INT_L";
+		};
+		gpio_ec_soc_pch_pwrok_od: ec_soc_pch_pwrok_od {
+			gpios = <&gpio7 2 GPIO_ODR_HIGH>;
+		};
+		gpio_ec_soc_pwr_btn_odl: ec_soc_pwr_btn_odl {
+			gpios = <&gpioc 1 GPIO_ODR_HIGH>;
+			enum-name = "GPIO_PCH_PWRBTN_L";
+		};
+		gpio_ec_soc_rsmrst_l: ec_soc_rsmrst_l {
+			gpios = <&gpioa 6 GPIO_OUTPUT>;
+		};
+		gpio_ec_soc_rtcrst: ec_soc_rtcrst {
+			gpios = <&gpio7 6 GPIO_OUTPUT>;
+		};
+		gpio_ec_soc_sys_pwrok: ec_soc_sys_pwrok {
+			gpios = <&gpio3 7 GPIO_OUTPUT>;
+		};
+		gpio_ec_soc_vccst_pwrgd_od: ec_soc_vccst_pwrgd_od {
+			gpios = <&gpioa 4 GPIO_ODR_HIGH>;
+		};
+		gpio_ec_wp_odl: ec_wp_odl {
+			gpios = <&gpioa 1 (GPIO_INPUT | GPIO_ACTIVE_LOW)>;
+		};
+		gpio_en_kb_bl: en_kb_bl {
+			gpios = <&gpioa 0 GPIO_OUTPUT>;
+			enum-name = "GPIO_EN_KEYBOARD_BACKLIGHT";
+		};
+		gpio_en_pp3300_s5: en_pp3300_s5 {
+			gpios = <&gpiob 6 GPIO_OUTPUT>;
+			enum-name = "GPIO_TEMP_SENSOR_POWER";
+		};
+		gpio_en_pp5000_pen_x: en_pp5000_pen_x {
+			gpios = <&gpioe 2 GPIO_OUTPUT>;
+		};
+		gpio_en_pp5000_s5: en_pp5000_s5 {
+			gpios = <&gpio4 0 GPIO_OUTPUT>;
+		};
+		gpio_en_slp_z: en_slp_z {
+			gpios = <&gpioe 1 GPIO_OUTPUT>;
+		};
+		gpio_en_usb_a0_vbus: en_usb_a0_vbus {
+			gpios = <&gpio9 1 GPIO_OUTPUT>;
+		};
+		gpio_gsc_ec_pwr_btn_odl: gsc_ec_pwr_btn_odl {
+			gpios = <&gpio0 0 GPIO_INPUT_PULL_UP>;
+			enum-name = "GPIO_POWER_BUTTON_L";
+		};
+		gpio_hdmi_sel: hdmi_sel {
+			gpios = <&gpioc 6 GPIO_OUTPUT>;
+		};
+		gpio_imu_int_l: imu_int_l {
+			gpios = <&gpio5 6 GPIO_INPUT>;
+		};
+		gpio_imvp91_vrrdy_od: imvp91_vrrdy_od {
+			gpios = <&gpio4 3 GPIO_INPUT>;
+		};
+		gpio_lid_open: lid_open {
+			gpios = <&gpiod 2 GPIO_INPUT>;
+			enum-name = "GPIO_LID_OPEN";
+		};
+		gpio_pen_detect_odl: pen_detect_odl {
+			gpios = <&gpio9 6 GPIO_INPUT_PULL_UP>;
+		};
+		gpio_pg_pp1050_mem_s3_od: pg_pp1050_mem_s3_od {
+			gpios = <&gpiof 0 GPIO_INPUT>;
+		};
+		gpio_pg_pp5000_s5_od: pg_pp5000_s5_od {
+			gpios = <&gpio4 2 GPIO_INPUT>;
+		};
+		gpio_rsmrst_pwrgd_l: rsmrst_pwrgd_l {
+			gpios = <&gpio9 4 GPIO_INPUT_PULL_UP>;
+		};
+		gpio_slp_s0_l: slp_s0_l {
+			gpios = <&gpio9 7 GPIO_INPUT>;
+		};
+		gpio_slp_s3_l: slp_s3_l {
+			gpios = <&gpioa 5 GPIO_INPUT>;
+		};
+		gpio_slp_s4_l: slp_s4_l {
+			gpios = <&gpio7 0 GPIO_INPUT>;
+		};
+		gpio_slp_sus_l: slp_sus_l {
+			gpios = <&gpio6 2 GPIO_INPUT>;
+		};
+		gpio_sub_usb_a1_ilimit_sdp: sub_usb_a1_ilimit_sdp {
+			gpios = <&gpiod 5 GPIO_OUTPUT>;
+			enum-name = "GPIO_USB2_ILIM_SEL";
+		};
+		gpio_sys_rst_odl: sys_rst_odl {
+			gpios = <&gpioc 5 GPIO_ODR_HIGH>;
+		};
+		gpio_tablet_mode_l: tablet_mode_l {
+			gpios = <&gpio9 5 GPIO_INPUT>;
+			enum-name = "GPIO_TABLET_MODE_L";
+		};
+		gpio_usb_a0_ilimit_sdp: usb_a0_ilimit_sdp {
+			gpios = <&gpio8 5 GPIO_OUTPUT>;
+			enum-name = "GPIO_USB1_ILIM_SEL";
+		};
+		gpio_usb_c0_int_odl: usb_c0_int_odl {
+			gpios = <&gpio0 1 GPIO_INPUT_PULL_UP>;
+		};
+		gpio_vccin_aux_vid0: vccin_aux_vid0 {
+			gpios = <&gpio9 2 (GPIO_INPUT | GPIO_VOLTAGE_1P8)>;
+		};
+		gpio_vccin_aux_vid1: vccin_aux_vid1 {
+			gpios = <&gpioe 3 (GPIO_INPUT | GPIO_VOLTAGE_1P8)>;
+		};
+		gpio_voldn_btn_odl: voldn_btn_odl {
+			gpios = <&gpioa 2 GPIO_INPUT_PULL_UP>;
+			enum-name = "GPIO_VOLUME_DOWN_L";
+		};
+		gpio_volup_btn_odl: volup_btn_odl {
+			gpios = <&gpio9 3 GPIO_INPUT_PULL_UP>;
+			enum-name = "GPIO_VOLUME_UP_L";
+		};
+	};
+
+	named-i2c-ports {
+		compatible = "named-i2c-ports";
+
+		i2c_ec_i2c_eeprom: ec_i2c_eeprom {
+			i2c-port = <&i2c0_0>;
+			enum-names = "I2C_PORT_EEPROM";
+		};
+		i2c_ec_i2c_sensor: ec_i2c_sensor {
+			i2c-port = <&i2c1_0>;
+			enum-names = "I2C_PORT_SENSOR";
+		};
+		i2c_ec_i2c_usb_c0: ec_i2c_usb_c0 {
+			i2c-port = <&i2c3_0>;
+			enum-names = "I2C_PORT_USB_C0_TCPC";
+		};
+		i2c_ec_i2c_sub_usb_c1: ec_i2c_sub_usb_c1 {
+			i2c-port = <&i2c5_1>;
+			enum-names = "I2C_PORT_USB_C1_TCPC";
+		};
+		i2c_ec_i2c_batt: ec_i2c_batt {
+			i2c-port = <&i2c7_0>;
+			enum-names = "I2C_PORT_BATTERY";
+		};
+	};
+};
+
+&adc0 {
+	status = "okay";
+	pinctrl-0 = <&adc0_chan0_gp45
+		     &adc0_chan1_gp44
+		     &adc0_chan4_gp41
+		     &adc0_chan6_gp34
+		     &adc0_chan10_gpe0>;
+	pinctrl-names = "default";
+};
+
+
+&i2c0_0 {
+	status = "okay";
+	pinctrl-0 = <&i2c0_0_sda_scl_gpb4_b5>;
+	pinctrl-names = "default";
+};
+
+&i2c1_0 {
+	status = "okay";
+	pinctrl-0 = <&i2c1_0_sda_scl_gp87_90>;
+	pinctrl-names = "default";
+};
+
+&i2c3_0 {
+	status = "okay";
+	pinctrl-0 = <&i2c3_0_sda_scl_gpd0_d1>;
+	pinctrl-names = "default";
+};
+
+&i2c5_1 {
+	status = "okay";
+	pinctrl-0 = <&i2c5_1_sda_scl_gpf4_f5>;
+	pinctrl-names = "default";
+};
+
+&i2c7_0 {
+	status = "okay";
+	pinctrl-0 = <&i2c7_0_sda_scl_gpb2_b3>;
+	pinctrl-names = "default";
+};
+
+&i2c_ctrl0 {
+	status = "okay";
+};
+
+&i2c_ctrl1 {
+	status = "okay";
+};
+
+&i2c_ctrl3 {
+	status = "okay";
+};
+
+&i2c_ctrl5 {
+	status = "okay";
+};
+
+&i2c_ctrl7 {
+	status = "okay";
+};
diff --git a/zephyr/program/nissa/uldren/keyboard.dtsi b/zephyr/program/nissa/uldren/keyboard.dtsi
new file mode 100644
index 0000000000..117f5630fe
--- /dev/null
+++ b/zephyr/program/nissa/uldren/keyboard.dtsi
@@ -0,0 +1,47 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/ {
+	kblight {
+		compatible = "cros-ec,kblight-pwm";
+		pwms = <&pwm6 6 PWM_KHZ(10) PWM_POLARITY_NORMAL>;
+	};
+};
+
+&pwm6 {
+	status = "okay";
+	pinctrl-0 = <&pwm6_gpc0>;
+	pinctrl-names = "default";
+};
+
+&cros_kb_raw {
+	status = "okay";
+	/* No KSO2 (it's inverted and implemented by GPIO) */
+	pinctrl-0 = <
+		&ksi0_gp31
+		&ksi1_gp30
+		&ksi2_gp27
+		&ksi3_gp26
+		&ksi4_gp25
+		&ksi5_gp24
+		&ksi6_gp23
+		&ksi7_gp22
+		&kso00_gp21
+		&kso01_gp20
+		&kso03_gp16
+		&kso04_gp15
+		&kso05_gp14
+		&kso06_gp13
+		&kso07_gp12
+		&kso08_gp11
+		&kso09_gp10
+		&kso10_gp07
+		&kso11_gp06
+		&kso12_gp05
+		&kso13_gp04
+		&kso14_gp82
+	>;
+	pinctrl-names = "default";
+};
diff --git a/zephyr/program/nissa/uldren/motionsense.dtsi b/zephyr/program/nissa/uldren/motionsense.dtsi
new file mode 100644
index 0000000000..70b381b843
--- /dev/null
+++ b/zephyr/program/nissa/uldren/motionsense.dtsi
@@ -0,0 +1,147 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+ #include <dt-bindings/motionsense/utils.h>
+
+
+/ {
+	aliases {
+		/*
+		 * Interrupt bindings for sensor devices.
+		 */
+		bmi3xx-int = &base_accel;
+		bma4xx-int = &lid_accel;
+	};
+
+	/*
+	 * Declare mutexes used by sensor drivers.
+	 * A mutex node is used to create an instance of mutex_t.
+	 * A mutex node is referenced by a sensor node if the
+	 * corresponding sensor driver needs to use the
+	 * instance of the mutex.
+	 */
+	motionsense-mutex {
+		compatible = "cros-ec,motionsense-mutex";
+		lid_mutex: lid-mutex {
+		};
+
+		base_mutex: base-mutex {
+		};
+	};
+
+	/* Rotation matrix used by drivers. */
+	motionsense-rotation-ref {
+		compatible = "cros-ec,motionsense-rotation-ref";
+		lid_rot_ref: lid-rotation-ref {
+			mat33 = <0 (-1) 0
+				 (-1) 0 0
+				 0 0 (-1)>;
+		};
+
+		base_rot_ref: base-rotation-ref {
+			mat33 = <0 1 0
+				 (-1) 0 0
+				 0 0 1>;
+		};
+	};
+
+	/*
+	 * Driver specific data. A driver-specific data can be shared with
+	 * different motion sensors while they are using the same driver.
+	 *
+	 * If a node's compatible starts with "cros-ec,accelgyro-", it is for
+	 * a common structure defined in accelgyro.h.
+	 * e.g) compatible = "cros-ec,accelgyro-als-drv-data" is for
+	 * "struct als_drv_data_t" in accelgyro.h
+	 */
+	motionsense-sensor-data {
+		bmi323_data: bmi323-drv-data {
+			compatible = "cros-ec,drvdata-bmi3xx";
+			status = "okay";
+		};
+
+		bma422_data: bma422-drv-data {
+			compatible = "cros-ec,drvdata-bma4xx";
+			status = "okay";
+		};
+	};
+
+	/*
+	 * List of motion sensors that creates motion_sensors array.
+	 * The nodelabel "lid_accel" and "base_accel" are used to indicate
+	 * motion sensor IDs for lid angle calculation.
+	 * TODO(b/238139272): The first entries of the array must be
+	 * accelerometers,then gyroscope. Fix this dependency in the DTS
+	 * processing which makes the devicetree entries independent.
+	 */
+	motionsense-sensor {
+		lid_accel: lid-accel {
+			compatible = "cros-ec,bma4xx";
+			status = "okay";
+
+			active-mask = "SENSOR_ACTIVE_S0_S3";
+			location = "MOTIONSENSE_LOC_LID";
+			mutex = <&lid_mutex>;
+			port = <&i2c_ec_i2c_sensor>;
+			rot-standard-ref = <&lid_rot_ref>;
+			default-range = <2>;
+			drv-data = <&bma422_data>;
+			configs {
+				compatible =
+					"cros-ec,motionsense-sensor-config";
+				ec-s0 {
+					odr = <(10000 | ROUND_UP_FLAG)>;
+				};
+				ec-s3 {
+					odr = <(10000 | ROUND_UP_FLAG)>;
+				};
+			};
+		};
+
+		base_accel: base-accel {
+			compatible = "cros-ec,bmi3xx-accel";
+			status = "okay";
+
+			active-mask = "SENSOR_ACTIVE_S0_S3";
+			location = "MOTIONSENSE_LOC_BASE";
+			mutex = <&base_mutex>;
+			port = <&i2c_ec_i2c_sensor>;
+			rot-standard-ref = <&base_rot_ref>;
+			drv-data = <&bmi323_data>;
+			configs {
+				compatible =
+					"cros-ec,motionsense-sensor-config";
+				ec-s0 {
+					odr = <(10000 | ROUND_UP_FLAG)>;
+				};
+				ec-s3 {
+					odr = <(10000 | ROUND_UP_FLAG)>;
+				};
+			};
+		};
+
+		base_gyro: base-gyro {
+			compatible = "cros-ec,bmi3xx-gyro";
+			status = "okay";
+
+			active-mask = "SENSOR_ACTIVE_S0_S3";
+			location = "MOTIONSENSE_LOC_BASE";
+			mutex = <&base_mutex>;
+			port = <&i2c_ec_i2c_sensor>;
+			rot-standard-ref = <&base_rot_ref>;
+			drv-data = <&bmi323_data>;
+		};
+	};
+
+	motionsense-sensor-info {
+		compatible = "cros-ec,motionsense-sensor-info";
+
+		/*
+		 * list of GPIO interrupts that have to
+		 * be enabled at initial stage
+		 */
+		sensor-irqs = <&int_imu &int_lid_imu>;
+	};
+};
diff --git a/zephyr/program/nissa/uldren/overlay.dtsi b/zephyr/program/nissa/uldren/overlay.dtsi
new file mode 100644
index 0000000000..78f4d63a83
--- /dev/null
+++ b/zephyr/program/nissa/uldren/overlay.dtsi
@@ -0,0 +1,444 @@
+/* Copyright 2021 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <cros/thermistor/thermistor.dtsi>
+#include <dt-bindings/usbc_mux.h>
+#include <dt-bindings/usb_pd_tcpm.h>
+
+/ {
+	aliases {
+		gpio-cbi-wp = &gpio_ec_cbi_wp;
+		gpio-wp = &gpio_ec_wp_odl;
+		int-wp = &int_wp_l;
+		gpio-kbd-kso2 = &gpio_ec_kso_02_inv;
+	};
+
+	ec-console {
+		compatible = "ec-console";
+		disabled = "events", "lpc", "hostcmd";
+	};
+
+	batteries {
+		default_battery: lgc {
+			compatible = "lgc,ap18c8k", "battery-smart";
+		};
+		lgc_ap19b8m {
+			compatible = "lgc,ap19b8m", "battery-smart";
+		};
+	};
+
+	hibernate-wake-pins {
+		compatible = "cros-ec,hibernate-wake-pins";
+		wakeup-irqs = <
+			&int_power_button
+			&int_lid_open
+		>;
+	};
+
+	gpio-interrupts {
+		compatible = "cros-ec,gpio-interrupts";
+
+		int_power_button: power_button {
+			irq-pin = <&gpio_gsc_ec_pwr_btn_odl>;
+			flags = <GPIO_INT_EDGE_BOTH>;
+			handler = "power_button_interrupt";
+		};
+		int_wp_l: wp_l {
+			irq-pin = <&gpio_ec_wp_odl>;
+			flags = <GPIO_INT_EDGE_BOTH>;
+			handler = "switch_interrupt";
+		};
+		int_lid_open: lid_open {
+			irq-pin = <&gpio_lid_open>;
+			flags = <GPIO_INT_EDGE_BOTH>;
+			handler = "lid_interrupt";
+		};
+		int_tablet_mode: tablet_mode {
+			irq-pin = <&gpio_tablet_mode_l>;
+			flags = <GPIO_INT_EDGE_BOTH>;
+			handler = "gmr_tablet_switch_isr";
+		};
+		int_imu: ec_imu {
+			irq-pin = <&gpio_imu_int_l>;
+			flags = <GPIO_INT_EDGE_FALLING>;
+			handler = "bmi3xx_interrupt";
+		};
+		int_lid_imu: lid_imu {
+			irq-pin = <&gpio_acc_int_l>;
+			flags = <GPIO_INT_EDGE_FALLING>;
+			handler = "bma4xx_interrupt";
+		};
+		int_vol_down: vol_down {
+			irq-pin = <&gpio_voldn_btn_odl>;
+			flags = <GPIO_INT_EDGE_BOTH>;
+			handler = "button_interrupt";
+		};
+		int_vol_up: vol_up {
+			irq-pin = <&gpio_volup_btn_odl>;
+			flags = <GPIO_INT_EDGE_BOTH>;
+			handler = "button_interrupt";
+		};
+		int_usb_c0: usb_c0 {
+			irq-pin = <&gpio_usb_c0_int_odl>;
+			flags = <GPIO_INT_EDGE_FALLING>;
+			handler = "usb_interrupt";
+		};
+		int_usb_c1: usb_c1 {
+			irq-pin = <&gpio_sb_1>;
+			flags = <GPIO_INT_EDGE_FALLING>;
+			handler = "usb_interrupt";
+		};
+	};
+
+	named-gpios {
+		gpio_sb_1: sb-1 {
+			gpios = <&gpio0 2 GPIO_PULL_UP>;
+			no-auto-init;
+		};
+
+		gpio_sb_2: sb-2 {
+			gpios = <&gpiod 4 GPIO_OUTPUT>;
+			no-auto-init;
+		};
+
+		/*
+		 * Set I2C pins for type C sub-board to be low voltage (I2C5_1).
+		 * We do this for all boards, since the pins are 3.3V tolerant,
+		 * and the only 2 types of sub-boards used on uldren both have
+		 * type-C ports on them.
+		 */
+		gpio_sb_3: sb-3 {
+			gpios = <&gpiof 4 (GPIO_OPEN_DRAIN | GPIO_VOLTAGE_1P8)>;
+			no-auto-init;
+		};
+		gpio_sb_4: sb-4 {
+			gpios = <&gpiof 5 (GPIO_INPUT | GPIO_VOLTAGE_1P8)>;
+			no-auto-init;
+		};
+		gpio_fan_enable: fan-enable {
+			gpios = <&gpio6 3 GPIO_OUTPUT>;
+			no-auto-init;
+		};
+		ec-i2c-sensor-scl {
+			gpios = <&gpio9 0 (GPIO_INPUT | GPIO_VOLTAGE_1P8)>;
+		};
+		ec-i2c-sensor-sda {
+			gpios = <&gpio8 7 (GPIO_INPUT | GPIO_VOLTAGE_1P8)>;
+		};
+	};
+
+	/*
+	 * Aliases used for sub-board GPIOs.
+	 */
+	aliases {
+		/*
+		 * Input GPIO when used with type-C port 1
+		 * Output when used with HDMI sub-board
+		 */
+		gpio-usb-c1-int-odl = &gpio_sb_1;
+		gpio-en-rails-odl = &gpio_sb_1;
+		/*
+		 * Sub-board with type A USB, enable.
+		 */
+		gpio-en-usb-a1-vbus = &gpio_sb_2;
+		/*
+		 * HPD pins for HDMI sub-board.
+		 */
+		gpio-hdmi-en-odl = &gpio_sb_3;
+		gpio-hpd-odl = &gpio_sb_4;
+		/*
+		 * Enable S5 rails for LTE sub-board
+		 */
+		gpio-en-sub-s5-rails = &gpio_sb_2;
+	};
+
+	temp_memory: memory {
+		compatible = "cros-ec,temp-sensor-thermistor";
+		thermistor = <&thermistor_3V3_51K1_47K_4050B>;
+		adc = <&adc_temp_sensor_1>;
+	};
+	temp_charger: charger {
+		compatible = "cros-ec,temp-sensor-thermistor";
+		thermistor = <&thermistor_3V3_51K1_47K_4050B>;
+		adc = <&adc_temp_sensor_2>;
+	};
+	temp_ambient: ambient {
+		compatible = "cros-ec,temp-sensor-thermistor";
+		thermistor = <&thermistor_3V3_51K1_47K_4050B>;
+		adc = <&adc_temp_sensor_3>;
+	};
+
+	named-temp-sensors {
+		compatible = "cros-ec,temp-sensors";
+		memory {
+			temp_fan_off = <35>;
+			temp_fan_max = <60>;
+			temp_host_high = <85>;
+			temp_host_halt = <90>;
+			temp_host_release_high = <80>;
+			power-good-pin = <&gpio_ec_soc_dsw_pwrok>;
+			sensor = <&temp_memory>;
+		};
+		charger {
+			temp_fan_off = <35>;
+			temp_fan_max = <60>;
+			temp_host_high = <85>;
+			temp_host_halt = <90>;
+			temp_host_release_high = <80>;
+			power-good-pin = <&gpio_ec_soc_dsw_pwrok>;
+			sensor = <&temp_charger>;
+		};
+		ambient {
+			temp_fan_off = <35>;
+			temp_fan_max = <60>;
+			temp_host_high = <85>;
+			temp_host_halt = <90>;
+			temp_host_release_high = <80>;
+			power-good-pin = <&gpio_ec_soc_dsw_pwrok>;
+			sensor = <&temp_ambient>;
+		};
+	};
+
+	usba {
+		compatible = "cros-ec,usba-port-enable-pins";
+		/*
+		 * sb_2 is only configured as GPIO when USB-A1 is present,
+		 * but it's still safe to control when disabled.
+		 *
+		 * ILIM_SEL pins are referred to by legacy enum name,
+		 * GPIO_USB*_ILIM_SEL. The one for port A1 is unused on
+		 * sub-boards that don't have USB-A so is safe to control
+		 * regardless of system configuration.
+		 */
+		enable-pins = <&gpio_en_usb_a0_vbus &gpio_sb_2>;
+		status = "okay";
+	};
+
+	usbc {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port0@0 {
+			compatible = "named-usbc-port";
+			reg = <0>;
+			bc12 = <&bc12_port0>;
+			chg = <&chg_port0>;
+			tcpc = <&tcpc_port0>;
+			usb-mux-chain-0 {
+				compatible = "cros-ec,usb-mux-chain";
+				usb-muxes = <&virtual_mux_0>;
+			};
+		};
+		port0-muxes {
+			virtual_mux_0: virtual-mux-0 {
+				compatible = "cros-ec,usbc-mux-virtual";
+			};
+		};
+		/*
+		 * TODO(b:211693800): port1 may not be present on some
+		 * sub-boards.
+		 */
+		port1@1 {
+			compatible = "named-usbc-port";
+			reg = <1>;
+			bc12 = <&bc12_port1>;
+			chg = <&chg_port1>;
+			tcpc = <&tcpc_port1>;
+			usb-mux-chain-1 {
+				compatible = "cros-ec,usb-mux-chain";
+				usb-muxes = <&virtual_mux_1 &anx7483_mux_1>;
+			};
+			usb_mux_chain_1_no_mux: usb-mux-chain-1-no-mux {
+				compatible = "cros-ec,usb-mux-chain";
+				alternative-chain;
+				usb-muxes = <&virtual_mux_1>;
+			};
+		};
+		port1-muxes {
+			virtual_mux_1: virtual-mux-1 {
+				compatible = "cros-ec,usbc-mux-virtual";
+			};
+		};
+	};
+
+	fans {
+		compatible = "cros-ec,fans";
+
+		fan_0 {
+			pwms = <&pwm5 5 PWM_KHZ(1) PWM_POLARITY_NORMAL>;
+			rpm_min = <2200>;
+			rpm_start = <2200>;
+			rpm_max = <4200>;
+			tach = <&tach2>;
+			enable_gpio = <&gpio_fan_enable>;
+		};
+	};
+
+	 /*
+	  * Declare unused GPIOs so that they are shut down
+	  * and use minimal power
+	  */
+	  unused-pins {
+		compatible = "unused-gpios";
+		unused-gpios =
+			<&gpio3 2 0>,
+			<&gpio3 3 0>,
+			<&gpio3 5 0>,
+			<&gpio3 6 0>,
+			<&gpio5 7 0>,
+			<&gpio6 0 0>,
+			<&gpio6 3 0>,
+			<&gpio6 6 0>,
+			<&gpio7 3 0>,
+			<&gpio8 3 0>,
+			<&gpio8 6 0>,
+			<&gpiob 1 0>,
+			<&gpiob 7 0>,
+			<&gpioc 7 0>,
+			<&gpiof 2 0>,
+			<&gpiof 3 0>;
+	 };
+};
+
+&thermistor_3V3_51K1_47K_4050B {
+	status = "okay";
+};
+
+&adc_ec_vsense_pp3300_s5 {
+	/*
+	 * Voltage divider on input has 47k upper and 220k lower legs with
+	 * 2714 mV full-scale reading on the ADC. Apply the largest possible
+	 * multiplier (without overflowing int32) to get the best possible
+	 * approximation of the actual ratio, but derate by a factor of two to
+	 * ensure unexpectedly high values won't overflow.
+	 */
+	mul = <(791261 / 2)>;
+	div = <(651975 / 2)>;
+};
+
+/* Set bus speeds for I2C */
+&i2c0_0 {
+	label = "I2C_EEPROM";
+	clock-frequency = <I2C_BITRATE_FAST>;
+
+	cbi_eeprom: eeprom@50 {
+		compatible = "atmel,at24";
+		reg = <0x50>;
+		size = <2048>;
+		pagesize = <16>;
+		address-width = <8>;
+		timeout = <5>;
+	};
+};
+
+&i2c1_0 {
+	label = "I2C_SENSOR";
+	clock-frequency = <I2C_BITRATE_FAST>;
+};
+
+&i2c3_0 {
+	label = "I2C_USB_C0_TCPC";
+	clock-frequency = <I2C_BITRATE_FAST_PLUS>;
+
+	bc12_port0: pi3usb9201@5f {
+		compatible = "pericom,pi3usb9201";
+		status = "okay";
+		reg = <0x5f>;
+		/*
+		 * BC1.2 interrupt is shared with TCPC, so
+		 * IRQ is not specified here and handled by
+		 * usb_c0_interrupt.
+		 */
+	};
+
+	chg_port0: isl923x@9 {
+		compatible = "intersil,isl923x";
+		status = "okay";
+		reg = <0x9>;
+	};
+
+	tcpc_port0: raa489000@22 {
+		compatible = "renesas,raa489000";
+		reg = <0x22>;
+		tcpc-flags = <(
+			TCPC_FLAGS_TCPCI_REV2_0 |
+			TCPC_FLAGS_VBUS_MONITOR)>;
+	};
+};
+
+&i2c5_1 {
+	label = "I2C_SUB_C1_TCPC";
+	clock-frequency = <I2C_BITRATE_FAST_PLUS>;
+
+	bc12_port1: pi3usb9201@5f {
+		compatible = "pericom,pi3usb9201";
+		status = "okay";
+		reg = <0x5f>;
+	};
+
+	chg_port1: isl923x@9 {
+		compatible = "intersil,isl923x";
+		status = "okay";
+		reg = <0x9>;
+	};
+
+	tcpc_port1: raa489000@22 {
+		compatible = "renesas,raa489000";
+		reg = <0x22>;
+		tcpc-flags = <(
+			TCPC_FLAGS_TCPCI_REV2_0 |
+			TCPC_FLAGS_VBUS_MONITOR)>;
+	};
+
+	anx7483_mux_1: anx7483-mux-1@3e {
+		compatible = "analogix,anx7483";
+		reg = <0x3e>;
+		board-set = "anx7483_set_default_tuning";
+		flags = <USB_MUX_FLAG_RESETS_IN_G3>;
+	};
+};
+
+&i2c7_0 {
+	label = "I2C_BATTERY";
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+};
+
+&pwm5_gpb7 {
+	drive-open-drain;
+};
+
+&pwm5 {
+	status = "okay";
+	clock-bus = "NPCX_CLOCK_BUS_LFCLK";
+	pinctrl-0 = <&pwm5_gpb7>;
+	pinctrl-names = "default";
+};
+
+/* Tachometer for fan speed measurement */
+&tach2 {
+	status = "okay";
+	pinctrl-0 = <&ta2_1_in_gp73>;
+	pinctrl-names = "default";
+	port = <NPCX_TACH_PORT_A>; /* port-A is selected */
+	sample-clk = <NPCX_TACH_FREQ_LFCLK>; /* Use LFCLK as sampling clock */
+	pulses-per-round = <2>; /* number of pulses per round of encoder */
+};
+
+/* host interface */
+&espi0 {
+	status = "okay";
+	pinctrl-0 = <&espi_lpc_gp46_47_51_52_53_54_55_57>;
+	pinctrl-names = "default";
+};
+
+/*
+ * Declare GPIOs that have leakage current caused by board issues here. NPCX ec
+ * will disable their input buffers before entering deep sleep and restore them
+ * after waking up automatically for better power consumption.
+ */
+&power_leakage_io {
+	leak-gpios = <&gpioa 4 0
+		      &gpiof 1 0>;
+};
diff --git a/zephyr/program/nissa/uldren/power_signals.dtsi b/zephyr/program/nissa/uldren/power_signals.dtsi
new file mode 100644
index 0000000000..1d2b23069d
--- /dev/null
+++ b/zephyr/program/nissa/uldren/power_signals.dtsi
@@ -0,0 +1,220 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/ {
+	chosen {
+		intel-ap-pwrseq,espi = &espi0;
+	};
+
+	common-pwrseq {
+		compatible = "intel,ap-pwrseq";
+
+		sys-pwrok-delay = <10>;
+		all-sys-pwrgd-timeout = <20>;
+	};
+
+	pwr-en-pp5000-s5 {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "PP5000_S5 enable output to regulator";
+		enum-name = "PWR_EN_PP5000_A";
+		gpios = <&gpio4 0 0>;
+		output;
+	};
+	pwr-en-pp3300-s5 {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "PP3300_S5 enable output to LS";
+		enum-name = "PWR_EN_PP3300_A";
+		gpios = <&gpiob 6 0>;
+		output;
+	};
+	pwr-pg-ec-rsmrst-od {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "RSMRST power good from regulator";
+		enum-name = "PWR_RSMRST";
+		gpios = <&gpio9 4 0>;
+		interrupt-flags = <GPIO_INT_EDGE_BOTH>;
+	};
+	pwr-ec-pch-rsmrst-odl {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "RSMRST output to PCH";
+		enum-name = "PWR_EC_PCH_RSMRST";
+		gpios = <&gpioa 6 0>;
+		output;
+	};
+	pwr-slp-s0-l {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "SLP_S0_L input from PCH";
+		enum-name = "PWR_SLP_S0";
+		gpios = <&gpio9 7 GPIO_ACTIVE_LOW>;
+		interrupt-flags = <GPIO_INT_EDGE_BOTH>;
+	};
+	pwr-slp-s3-l {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "SLP_S3_L input from PCH";
+		enum-name = "PWR_SLP_S3";
+		gpios = <&gpioa 5 GPIO_ACTIVE_LOW>;
+		interrupt-flags = <GPIO_INT_EDGE_BOTH>;
+	};
+	pwr-slp-sus-l {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "SLP_SUS_L input from PCH";
+		enum-name = "PWR_SLP_SUS";
+		gpios = <&gpio6 2 GPIO_ACTIVE_LOW>;
+		interrupt-flags = <GPIO_INT_EDGE_BOTH>;
+	};
+	pwr-ec-soc-dsw-pwrok {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "DSW_PWROK output to PCH";
+		enum-name = "PWR_EC_SOC_DSW_PWROK";
+		gpios = <&gpio6 1 0>;
+		output;
+	};
+	pwr-vccst-pwrgd-od {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "VCCST_PWRGD output to PCH";
+		enum-name = "PWR_VCCST_PWRGD";
+		gpios = <&gpioa 4 GPIO_OPEN_DRAIN>;
+		output;
+	};
+	pwr-imvp9-vrrdy-od {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "VRRDY input from IMVP9";
+		enum-name = "PWR_IMVP9_VRRDY";
+		gpios = <&gpio4 3 0>;
+	};
+	pwr-pch-pwrok {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "PCH_PWROK output to PCH";
+		enum-name = "PWR_PCH_PWROK";
+		gpios = <&gpio7 2 GPIO_OPEN_DRAIN>;
+		output;
+	};
+	pwr-ec-pch-sys-pwrok {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "SYS_PWROK output to PCH";
+		enum-name = "PWR_EC_PCH_SYS_PWROK";
+		gpios = <&gpio3 7 0>;
+		output;
+	};
+	pwr-sys-rst-l {
+		compatible = "intel,ap-pwrseq-gpio";
+		dbg-label = "SYS_RESET# output to PCH";
+		enum-name = "PWR_SYS_RST";
+		gpios = <&gpioc 5 (GPIO_ACTIVE_LOW|GPIO_OPEN_DRAIN)>;
+		output;
+	};
+	pwr-slp-s4 {
+		compatible = "intel,ap-pwrseq-vw";
+		dbg-label = "SLP_S4 virtual wire input from PCH";
+		enum-name = "PWR_SLP_S4";
+		virtual-wire = "ESPI_VWIRE_SIGNAL_SLP_S4";
+		vw-invert;
+	};
+	pwr-slp-s5 {
+		compatible = "intel,ap-pwrseq-vw";
+		dbg-label = "SLP_S5 virtual wire input from PCH";
+		enum-name = "PWR_SLP_S5";
+		virtual-wire = "ESPI_VWIRE_SIGNAL_SLP_S5";
+		vw-invert;
+	};
+	pwr-all-sys-pwrgd {
+		compatible = "intel,ap-pwrseq-external";
+		dbg-label = "Combined all power good";
+		enum-name = "PWR_ALL_SYS_PWRGD";
+	};
+	pwr-adc-pp3300 {
+		compatible = "intel,ap-pwrseq-adc";
+		dbg-label = "PP3300 PWROK (from ADC)";
+		enum-name = "PWR_DSW_PWROK";
+		trigger-high = <&cmp_pp3300_s5_high>;
+		trigger-low = <&cmp_pp3300_s5_low>;
+	};
+	pwr-adc-pp1p05 {
+		compatible = "intel,ap-pwrseq-adc";
+		dbg-label = "PP1P05 PWROK (from ADC)";
+		enum-name = "PWR_PG_PP1P05";
+		trigger-high = <&cmp_pp1p05_high>;
+		trigger-low = <&cmp_pp1p05_low>;
+	};
+
+	adc-cmp {
+		cmp_pp3300_s5_high: pp3300_high {
+			compatible = "nuvoton,adc-cmp";
+			io-channels = <&adc0 6>;
+			comparison = "ADC_CMP_NPCX_GREATER";
+			/*
+			 * This is 90% of nominal voltage considering voltage
+			 * divider on ADC input.
+			 */
+			threshold-mv = <2448>;
+		};
+		cmp_pp3300_s5_low: pp3300_low {
+			compatible = "nuvoton,adc-cmp";
+			io-channels = <&adc0 6>;
+			comparison = "ADC_CMP_NPCX_LESS_OR_EQUAL";
+			threshold-mv = <2448>;
+		};
+		cmp_pp1p05_high: pp1p05_high {
+			compatible = "nuvoton,adc-cmp";
+			io-channels = <&adc0 4>;
+			comparison = "ADC_CMP_NPCX_GREATER";
+			/* Setting at 90% of nominal voltage */
+			threshold-mv = <945>;
+		};
+		cmp_pp1p05_low: pp1p05_low {
+			compatible = "nuvoton,adc-cmp";
+			io-channels = <&adc0 4>;
+			comparison = "ADC_CMP_NPCX_LESS_OR_EQUAL";
+			threshold-mv = <945>;
+		};
+	};
+};
+
+/*
+ * Because the power signals directly reference the GPIOs,
+ * the correspinding named-gpios need to have no-auto-init set.
+ */
+&gpio_ec_soc_dsw_pwrok {
+	no-auto-init;
+};
+&gpio_ec_soc_pch_pwrok_od {
+	no-auto-init;
+};
+&gpio_ec_soc_rsmrst_l {
+	no-auto-init;
+};
+&gpio_ec_soc_sys_pwrok {
+	no-auto-init;
+};
+&gpio_ec_soc_vccst_pwrgd_od {
+	no-auto-init;
+};
+&gpio_en_pp3300_s5 {
+	no-auto-init;
+};
+&gpio_en_pp5000_s5 {
+	no-auto-init;
+};
+&gpio_imvp91_vrrdy_od {
+	no-auto-init;
+};
+&gpio_rsmrst_pwrgd_l {
+	no-auto-init;
+};
+&gpio_slp_s0_l {
+	no-auto-init;
+};
+&gpio_slp_s3_l {
+	no-auto-init;
+};
+&gpio_slp_s4_l {
+	no-auto-init;
+};
+&gpio_slp_sus_l {
+	no-auto-init;
+};
+&gpio_sys_rst_odl {
+	no-auto-init;
+};
diff --git a/zephyr/program/nissa/uldren/project.conf b/zephyr/program/nissa/uldren/project.conf
new file mode 100644
index 0000000000..7766f70f0e
--- /dev/null
+++ b/zephyr/program/nissa/uldren/project.conf
@@ -0,0 +1,18 @@
+# Copyright 2023 The ChromiumOS Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+CONFIG_BOARD_ULDREN=y
+CONFIG_PLATFORM_EC_OCPC=y
+
+CONFIG_PLATFORM_EC_ACCELGYRO_BMI_COMM_I2C=y
+CONFIG_PLATFORM_EC_ACCELGYRO_BMI3XX=y
+CONFIG_PLATFORM_EC_ACCEL_BMA4XX=y
+CONFIG_PLATFORM_EC_MAX_SENSOR_FREQ_MILLIHZ=100000
+
+# Both ports use a SLGC55545 smart switch with CTL1..3 fixed high,
+# for SDP2 or CDP only.
+CONFIG_PLATFORM_EC_USB_PORT_POWER_SMART=y
+CONFIG_PLATFORM_EC_USB_PORT_POWER_SMART_CDP_SDP_ONLY=y
+CONFIG_PLATFORM_EC_USB_PORT_POWER_SMART_DEFAULT_CDP=y
+CONFIG_PLATFORM_EC_USB_PORT_POWER_SMART_INVERTED=y
diff --git a/zephyr/program/nissa/uldren/project.overlay b/zephyr/program/nissa/uldren/project.overlay
new file mode 100644
index 0000000000..9ca681d979
--- /dev/null
+++ b/zephyr/program/nissa/uldren/project.overlay
@@ -0,0 +1,14 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "../cbi.dtsi"
+
+#include "cbi.dtsi"
+#include "generated.dtsi"
+#include "keyboard.dtsi"
+#include "motionsense.dtsi"
+#include "overlay.dtsi"
+#include "power_signals.dtsi"
+#include "pwm_leds.dtsi"
diff --git a/zephyr/program/nissa/uldren/pwm_leds.dtsi b/zephyr/program/nissa/uldren/pwm_leds.dtsi
new file mode 100644
index 0000000000..a265a5929e
--- /dev/null
+++ b/zephyr/program/nissa/uldren/pwm_leds.dtsi
@@ -0,0 +1,62 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/ {
+	pwmleds {
+		compatible = "pwm-leds";
+		pwm_led0: pwm_led_0 {
+			pwms = <&pwm2 2 PWM_HZ(324) PWM_POLARITY_INVERTED>,
+			       <&pwm0 0 PWM_HZ(324) PWM_POLARITY_INVERTED>,
+			       <&pwm1 1 PWM_HZ(324) PWM_POLARITY_INVERTED>;
+		};
+	};
+
+	cros-pwmleds {
+		compatible = "cros-ec,pwm-leds";
+
+		leds = <&pwm_led0>;
+
+				/*<red green blue>*/
+		color-map-red    = <100   0    0>;
+		color-map-green  = <  0 100    0>;
+		color-map-blue   = <  0   0  100>;
+		color-map-yellow = <  0  50   50>;
+		color-map-white  = <100 100  100>;
+		color-map-amber  = <100   0    0>;
+
+		brightness-range = <0 0 100 0 0 100>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		pwm_led_0@0 {
+			reg = <0>;
+			ec-led-name = "EC_LED_ID_BATTERY_LED";
+		};
+	};
+};
+
+/* Enable LEDs to work while CPU suspended */
+
+&pwm0 {
+	status = "okay";
+	clock-bus = "NPCX_CLOCK_BUS_LFCLK";
+	pinctrl-0 = <&pwm0_gpc3>;
+	pinctrl-names = "default";
+};
+
+&pwm1 {
+	status = "okay";
+	clock-bus = "NPCX_CLOCK_BUS_LFCLK";
+	pinctrl-0 = <&pwm1_gpc2>;
+	pinctrl-names = "default";
+};
+
+&pwm2 {
+	status = "okay";
+	clock-bus = "NPCX_CLOCK_BUS_LFCLK";
+	pinctrl-0 = <&pwm2_gpc4>;
+	pinctrl-names = "default";
+};
diff --git a/zephyr/program/nissa/uldren/src/charger.c b/zephyr/program/nissa/uldren/src/charger.c
new file mode 100644
index 0000000000..2b1c285a27
--- /dev/null
+++ b/zephyr/program/nissa/uldren/src/charger.c
@@ -0,0 +1,55 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "battery.h"
+#include "charger.h"
+#include "charger/isl923x_public.h"
+#include "console.h"
+#include "extpower.h"
+#include "usb_pd.h"
+
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL);
+
+int extpower_is_present(void)
+{
+	int port;
+	int rv;
+	bool acok;
+
+	for (port = 0; port < board_get_usb_pd_port_count(); port++) {
+		rv = raa489000_is_acok(port, &acok);
+		if ((rv == EC_SUCCESS) && acok)
+			return 1;
+	}
+
+	return 0;
+}
+
+/*
+ * Uldren does not have a GPIO indicating whether extpower is present,
+ * so detect using the charger(s).
+ */
+__override void board_check_extpower(void)
+{
+	static int last_extpower_present;
+	int extpower_present = extpower_is_present();
+
+	if (last_extpower_present ^ extpower_present)
+		extpower_handle_update(extpower_present);
+
+	last_extpower_present = extpower_present;
+}
+
+__override void board_hibernate(void)
+{
+	/* Shut down the chargers */
+	if (board_get_usb_pd_port_count() == 2)
+		raa489000_hibernate(CHARGER_SECONDARY, true);
+	raa489000_hibernate(CHARGER_PRIMARY, true);
+	LOG_INF("Charger(s) hibernated");
+	cflush();
+}
diff --git a/zephyr/program/nissa/uldren/src/fan.c b/zephyr/program/nissa/uldren/src/fan.c
new file mode 100644
index 0000000000..32f9d3c65e
--- /dev/null
+++ b/zephyr/program/nissa/uldren/src/fan.c
@@ -0,0 +1,41 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "cros_cbi.h"
+#include "fan.h"
+#include "gpio/gpio.h"
+#include "hooks.h"
+
+#include <zephyr/devicetree.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL);
+
+/*
+ * Nirwen fan support
+ */
+static void fan_init(void)
+{
+	int ret;
+	uint32_t val;
+	/*
+	 * Retrieve the fan config.
+	 */
+	ret = cros_cbi_get_fw_config(FW_FAN, &val);
+	if (ret != 0) {
+		LOG_ERR("Error retrieving CBI FW_CONFIG field %d", FW_FAN);
+		return;
+	}
+	if (val != FW_FAN_PRESENT) {
+		/* Disable the fan */
+		fan_set_count(0);
+	} else {
+		/* Configure the fan enable GPIO */
+		gpio_pin_configure_dt(GPIO_DT_FROM_NODELABEL(gpio_fan_enable),
+				      GPIO_OUTPUT);
+	}
+}
+DECLARE_HOOK(HOOK_INIT, fan_init, HOOK_PRIO_POST_FIRST);
diff --git a/zephyr/program/nissa/uldren/src/form_factor.c b/zephyr/program/nissa/uldren/src/form_factor.c
new file mode 100644
index 0000000000..72c0ba04d3
--- /dev/null
+++ b/zephyr/program/nissa/uldren/src/form_factor.c
@@ -0,0 +1,45 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "accelgyro.h"
+#include "cros_cbi.h"
+#include "hooks.h"
+#include "motionsense_sensors.h"
+
+#include <zephyr/devicetree.h>
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL);
+
+/*
+ * Mainboard orientation support.
+ */
+
+#define ALT_MAT SENSOR_ROT_STD_REF_NAME(DT_NODELABEL(base_rot_inverted))
+#define BASE_SENSOR SENSOR_ID(DT_NODELABEL(base_accel))
+#define BASE_GYRO SENSOR_ID(DT_NODELABEL(base_gyro))
+
+static void form_factor_init(void)
+{
+	int ret;
+	uint32_t val;
+	/*
+	 * If the firmware config indicates
+	 * an inverted form factor, use the alternative
+	 * rotation matrix.
+	 */
+	ret = cros_cbi_get_fw_config(FW_BASE_INVERSION, &val);
+	if (ret != 0) {
+		LOG_ERR("Error retrieving CBI FW_CONFIG field %d",
+			FW_BASE_INVERSION);
+		return;
+	}
+	if (val == FW_BASE_INVERTED) {
+		LOG_INF("Switching to inverted base");
+		motion_sensors[BASE_SENSOR].rot_standard_ref = &ALT_MAT;
+		motion_sensors[BASE_GYRO].rot_standard_ref = &ALT_MAT;
+	}
+}
+DECLARE_HOOK(HOOK_INIT, form_factor_init, HOOK_PRIO_POST_I2C);
diff --git a/zephyr/program/nissa/uldren/src/keyboard.c b/zephyr/program/nissa/uldren/src/keyboard.c
new file mode 100644
index 0000000000..1d877d9d40
--- /dev/null
+++ b/zephyr/program/nissa/uldren/src/keyboard.c
@@ -0,0 +1,29 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "ec_commands.h"
+
+static const struct ec_response_keybd_config uldren_kb = {
+	.num_top_row_keys = 10,
+	.action_keys = {
+		TK_BACK,		/* T1 */
+		TK_REFRESH,		/* T2 */
+		TK_FULLSCREEN,		/* T3 */
+		TK_OVERVIEW,		/* T4 */
+		TK_SNAPSHOT,		/* T5 */
+		TK_BRIGHTNESS_DOWN,	/* T6 */
+		TK_BRIGHTNESS_UP,	/* T7 */
+		TK_VOL_MUTE,		/* T8 */
+		TK_VOL_DOWN,		/* T9 */
+		TK_VOL_UP,		/* T10 */
+	},
+	.capabilities = KEYBD_CAP_SCRNLOCK_KEY,
+};
+
+__override const struct ec_response_keybd_config *
+board_vivaldi_keybd_config(void)
+{
+	return &uldren_kb;
+}
diff --git a/zephyr/program/nissa/uldren/src/led.c b/zephyr/program/nissa/uldren/src/led.c
new file mode 100644
index 0000000000..f9e93f47e9
--- /dev/null
+++ b/zephyr/program/nissa/uldren/src/led.c
@@ -0,0 +1,51 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Battery LED control for nissa
+ */
+#include "common.h"
+#include "ec_commands.h"
+#include "led_common.h"
+#include "led_onoff_states.h"
+#include "led_pwm.h"
+
+__override const int led_charge_lvl_1 = 5;
+__override const int led_charge_lvl_2 = 97;
+__override struct led_descriptor
+	led_bat_state_table[LED_NUM_STATES][LED_NUM_PHASES] = {
+		[STATE_CHARGING_LVL_1] = { { EC_LED_COLOR_AMBER,
+					     LED_INDEFINITE } },
+		[STATE_CHARGING_LVL_2] = { { EC_LED_COLOR_AMBER,
+					     LED_INDEFINITE } },
+		[STATE_CHARGING_FULL_CHARGE] = { { EC_LED_COLOR_BLUE,
+						   LED_INDEFINITE } },
+		[STATE_DISCHARGE_S0] = { { EC_LED_COLOR_BLUE,
+					   LED_INDEFINITE } },
+		[STATE_DISCHARGE_S0_BAT_LOW] = { { EC_LED_COLOR_AMBER,
+						   LED_INDEFINITE } },
+		[STATE_DISCHARGE_S3] = { { LED_OFF, LED_INDEFINITE } },
+		[STATE_DISCHARGE_S5] = { { LED_OFF, LED_INDEFINITE } },
+		[STATE_BATTERY_ERROR] = { { EC_LED_COLOR_AMBER,
+					    1 * LED_ONE_SEC },
+					  { LED_OFF, 1 * LED_ONE_SEC } },
+		[STATE_FACTORY_TEST] = { { EC_LED_COLOR_AMBER,
+					   2 * LED_ONE_SEC },
+					 { EC_LED_COLOR_BLUE,
+					   2 * LED_ONE_SEC } },
+	};
+
+__override void led_set_color_battery(enum ec_led_colors color)
+{
+	switch (color) {
+	case EC_LED_COLOR_BLUE:
+		set_pwm_led_color(EC_LED_ID_BATTERY_LED, EC_LED_COLOR_BLUE);
+		break;
+	case EC_LED_COLOR_AMBER:
+		set_pwm_led_color(EC_LED_ID_BATTERY_LED, EC_LED_COLOR_AMBER);
+		break;
+	default: /* LED_OFF and other unsupported colors */
+		set_pwm_led_color(EC_LED_ID_BATTERY_LED, -1);
+		break;
+	}
+}
diff --git a/zephyr/program/nissa/uldren/src/usbc.c b/zephyr/program/nissa/uldren/src/usbc.c
new file mode 100644
index 0000000000..aaba5492dd
--- /dev/null
+++ b/zephyr/program/nissa/uldren/src/usbc.c
@@ -0,0 +1,250 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "charge_state_v2.h"
+#include "chipset.h"
+#include "driver/charger/isl923x_public.h"
+#include "driver/retimer/anx7483_public.h"
+#include "driver/tcpm/raa489000.h"
+#include "driver/tcpm/tcpci.h"
+#include "hooks.h"
+#include "system.h"
+#include "usb_mux.h"
+
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL);
+
+int board_is_sourcing_vbus(int port)
+{
+	int regval;
+
+	tcpc_read(port, TCPC_REG_POWER_STATUS, &regval);
+	return !!(regval & TCPC_REG_POWER_STATUS_SOURCING_VBUS);
+}
+
+int board_set_active_charge_port(int port)
+{
+	int is_real_port = (port >= 0 && port < CONFIG_USB_PD_PORT_MAX_COUNT);
+	int i;
+	int old_port;
+
+	if (!is_real_port && port != CHARGE_PORT_NONE)
+		return EC_ERROR_INVAL;
+
+	old_port = charge_manager_get_active_charge_port();
+
+	LOG_INF("New chg p%d", port);
+
+	/* Disable all ports. */
+	if (port == CHARGE_PORT_NONE) {
+		for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
+			tcpc_write(i, TCPC_REG_COMMAND,
+				   TCPC_REG_COMMAND_SNK_CTRL_LOW);
+			raa489000_enable_asgate(i, false);
+		}
+
+		return EC_SUCCESS;
+	}
+
+	/* Check if port is sourcing VBUS. */
+	if (board_is_sourcing_vbus(port)) {
+		LOG_WRN("Skip enable p%d", port);
+		return EC_ERROR_INVAL;
+	}
+
+	/*
+	 * Turn off the other ports' sink path FETs, before enabling the
+	 * requested charge port.
+	 */
+	for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
+		if (i == port)
+			continue;
+
+		if (tcpc_write(i, TCPC_REG_COMMAND,
+			       TCPC_REG_COMMAND_SNK_CTRL_LOW))
+			LOG_WRN("p%d: sink path disable failed.", i);
+		raa489000_enable_asgate(i, false);
+	}
+
+	/*
+	 * Stop the charger IC from switching while changing ports.  Otherwise,
+	 * we can overcurrent the adapter we're switching to. (crbug.com/926056)
+	 */
+	if (old_port != CHARGE_PORT_NONE)
+		charger_discharge_on_ac(1);
+
+	/* Enable requested charge port. */
+	if (raa489000_enable_asgate(port, true) ||
+	    tcpc_write(port, TCPC_REG_COMMAND,
+		       TCPC_REG_COMMAND_SNK_CTRL_HIGH)) {
+		LOG_WRN("p%d: sink path enable failed.", port);
+		charger_discharge_on_ac(0);
+		return EC_ERROR_UNKNOWN;
+	}
+
+	/* Allow the charger IC to begin/continue switching. */
+	charger_discharge_on_ac(0);
+
+	return EC_SUCCESS;
+}
+
+uint16_t tcpc_get_alert_status(void)
+{
+	uint16_t status = 0;
+	int regval;
+
+	/*
+	 * The interrupt line is shared between the TCPC and BC1.2 detector IC.
+	 * Therefore, go out and actually read the alert registers to report the
+	 * alert status.
+	 */
+	if (!gpio_pin_get_dt(GPIO_DT_FROM_NODELABEL(gpio_usb_c0_int_odl))) {
+		if (!tcpc_read16(0, TCPC_REG_ALERT, &regval)) {
+			/* The TCPCI Rev 1.0 spec says to ignore bits 14:12. */
+			if (!(tcpc_config[0].flags & TCPC_FLAGS_TCPCI_REV2_0))
+				regval &= ~((1 << 14) | (1 << 13) | (1 << 12));
+
+			if (regval)
+				status |= PD_STATUS_TCPC_ALERT_0;
+		}
+	}
+
+	if (board_get_usb_pd_port_count() == 2 &&
+	    !gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_usb_c1_int_odl))) {
+		if (!tcpc_read16(1, TCPC_REG_ALERT, &regval)) {
+			/* TCPCI spec Rev 1.0 says to ignore bits 14:12. */
+			if (!(tcpc_config[1].flags & TCPC_FLAGS_TCPCI_REV2_0))
+				regval &= ~((1 << 14) | (1 << 13) | (1 << 12));
+
+			if (regval)
+				status |= PD_STATUS_TCPC_ALERT_1;
+		}
+	}
+
+	return status;
+}
+
+void pd_power_supply_reset(int port)
+{
+	/* Disable VBUS */
+	tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SRC_CTRL_LOW);
+
+	/* Notify host of power info change. */
+	pd_send_host_event(PD_EVENT_POWER_CHANGE);
+}
+
+__override void typec_set_source_current_limit(int port, enum tcpc_rp_value rp)
+{
+	if (port < 0 || port >= CONFIG_USB_PD_PORT_MAX_COUNT)
+		return;
+
+	raa489000_set_output_current(port, rp);
+}
+
+int pd_set_power_supply_ready(int port)
+{
+	int rv;
+
+	if (port >= CONFIG_USB_PD_PORT_MAX_COUNT)
+		return EC_ERROR_INVAL;
+
+	/* Disable charging. */
+	rv = tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SNK_CTRL_LOW);
+	if (rv)
+		return rv;
+
+	/* Our policy is not to source VBUS when the AP is off. */
+	if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
+		return EC_ERROR_NOT_POWERED;
+
+	/* Provide Vbus. */
+	rv = tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SRC_CTRL_HIGH);
+	if (rv)
+		return rv;
+
+	rv = raa489000_enable_asgate(port, true);
+	if (rv)
+		return rv;
+
+	/* Notify host of power info change. */
+	pd_send_host_event(PD_EVENT_POWER_CHANGE);
+
+	return EC_SUCCESS;
+}
+
+void board_reset_pd_mcu(void)
+{
+	/*
+	 * TODO(b:147316511): could send a reset command to the TCPC here
+	 * if needed.
+	 */
+}
+
+/*
+ * Because the TCPCs and BC1.2 chips share interrupt lines, it's possible
+ * for an interrupt to be lost if one asserts the IRQ, the other does the same
+ * then the first releases it: there will only be one falling edge to trigger
+ * the interrupt, and the line will be held low. We handle this by running a
+ * deferred check after a falling edge to see whether the IRQ is still being
+ * asserted. If it is, we assume an interrupt may have been lost and we need
+ * to poll each chip for events again.
+ */
+#define USBC_INT_POLL_DELAY_US 5000
+
+static void poll_c0_int(void);
+DECLARE_DEFERRED(poll_c0_int);
+static void poll_c1_int(void);
+DECLARE_DEFERRED(poll_c1_int);
+
+static void usbc_interrupt_trigger(int port)
+{
+	schedule_deferred_pd_interrupt(port);
+	usb_charger_task_set_event(port, USB_CHG_EVENT_BC12);
+}
+
+static inline void poll_usb_gpio(int port, const struct gpio_dt_spec *gpio,
+				 const struct deferred_data *ud)
+{
+	if (!gpio_pin_get_dt(gpio)) {
+		usbc_interrupt_trigger(port);
+		hook_call_deferred(ud, USBC_INT_POLL_DELAY_US);
+	}
+}
+
+static void poll_c0_int(void)
+{
+	poll_usb_gpio(0, GPIO_DT_FROM_NODELABEL(gpio_usb_c0_int_odl),
+		      &poll_c0_int_data);
+}
+
+static void poll_c1_int(void)
+{
+	poll_usb_gpio(1, GPIO_DT_FROM_ALIAS(gpio_usb_c1_int_odl),
+		      &poll_c1_int_data);
+}
+
+void usb_interrupt(enum gpio_signal signal)
+{
+	int port;
+	const struct deferred_data *ud;
+
+	if (signal == GPIO_SIGNAL(DT_NODELABEL(gpio_usb_c0_int_odl))) {
+		port = 0;
+		ud = &poll_c0_int_data;
+	} else {
+		port = 1;
+		ud = &poll_c1_int_data;
+	}
+	/*
+	 * We've just been called from a falling edge, so there's definitely
+	 * no lost IRQ right now. Cancel any pending check.
+	 */
+	hook_call_deferred(ud, -1);
+	/* Trigger polling of TCPC and BC1.2 in respective tasks */
+	usbc_interrupt_trigger(port);
+	/* Check for lost interrupts in a bit */
+	hook_call_deferred(ud, USBC_INT_POLL_DELAY_US);
+}