vell: Initial EC imagestabilize-14345.B-main

Create the initial EC image for the vell variant by copying the brya
reference board EC files into a new directory named for the variant.

(Auto-Generated by create_initial_ec_image.sh version 1.5.0).

BUG=b:205908918
BRANCH=None
TEST=make BOARD=vell, make buildall

Signed-off-by: Shon Wang <shon.wang@quanta.corp-partner.google.com>
Change-Id: I4e5bd91e643a8ef1a1ec6cf1dbb191d192433cb4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3277679
Reviewed-by: Devin Lu <Devin.Lu@quantatw.com>
Reviewed-by: caveh jalali <caveh@chromium.org>
Reviewed-by: YH Lin <yueherngl@chromium.org>
Tested-by: Devin Lu <Devin.Lu@quantatw.com>
Commit-Queue: YH Lin <yueherngl@chromium.org>

20 files changed, 2340 insertions, 0 deletions

diff --git a/board/vell/battery.c b/board/vell/battery.c
new file mode 100644
index 0000000000..91faab57a3
--- /dev/null
+++ b/board/vell/battery.c
@@ -0,0 +1,112 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Battery pack vendor provided charging profile
+ */
+
+#include "battery_fuel_gauge.h"
+#include "cbi.h"
+#include "common.h"
+#include "compile_time_macros.h"
+#include "gpio.h"
+/*
+ * Battery info for all Brya battery types. Note that the fields
+ * start_charging_min/max and charging_min/max are not used for the charger.
+ * The effective temperature limits are given by discharging_min/max_c.
+ *
+ * Fuel Gauge (FG) parameters which are used for determining if the battery
+ * is connected, the appropriate ship mode (battery cutoff) command, and the
+ * charge/discharge FETs status.
+ *
+ * Ship mode (battery cutoff) requires 2 writes to the appropriate smart battery
+ * register. For some batteries, the charge/discharge FET bits are set when
+ * charging/discharging is active, in other types, these bits set mean that
+ * charging/discharging is disabled. Therefore, in addition to the mask for
+ * these bits, a disconnect value must be specified. Note that for TI fuel
+ * gauge, the charge/discharge FET status is found in Operation Status (0x54),
+ * but a read of Manufacturer Access (0x00) will return the lower 16 bits of
+ * Operation status which contains the FET status bits.
+ *
+ * The assumption for battery types supported is that the charge/discharge FET
+ * status can be read with a sb_read() command and therefore, only the register
+ * address, mask, and disconnect value need to be provided.
+ */
+const struct board_batt_params board_battery_info[] = {
+	/* POW-TECH GQA05 Battery Information */
+	[BATTERY_POWER_TECH] = {
+		/* BQ40Z50 Fuel Gauge */
+		.fuel_gauge = {
+			.manuf_name = "POW-TECH",
+			.device_name = "BATGQA05L22",
+			.ship_mode = {
+				.reg_addr = 0x00,
+				.reg_data = { 0x0010, 0x0010 },
+			},
+			.fet = {
+				.mfgacc_support = 1,
+				.reg_addr = 0x00,
+				.reg_mask = 0x2000,		/* XDSG */
+				.disconnect_val = 0x2000,
+			}
+		},
+		.batt_info = {
+			.voltage_max		= TARGET_WITH_MARGIN(13050, 5),
+			.voltage_normal		= 11400, /* mV */
+			.voltage_min		= 9000, /* mV */
+			.precharge_current	= 280,	/* mA */
+			.start_charging_min_c	= 0,
+			.start_charging_max_c	= 45,
+			.charging_min_c		= 0,
+			.charging_max_c		= 45,
+			.discharging_min_c	= -10,
+			.discharging_max_c	= 60,
+		},
+	},
+	/* LGC L17L3PB0 Battery Information */
+	/*
+	 * Battery info provided by ODM on b/143477210, comment #11
+	 */
+	[BATTERY_LGC011] = {
+		.fuel_gauge = {
+			.manuf_name = "LGC",
+			.ship_mode = {
+				.reg_addr = 0x00,
+				.reg_data = { 0x0010, 0x0010 },
+			},
+			.fet = {
+				.reg_addr = 0x0,
+				.reg_mask = 0x6000,
+				.disconnect_val = 0x6000,
+			}
+		},
+		.batt_info = {
+			.voltage_max		= TARGET_WITH_MARGIN(13200, 5),
+			.voltage_normal		= 11550, /* mV */
+			.voltage_min		= 9000, /* mV */
+			.precharge_current	= 256,	/* mA */
+			.start_charging_min_c	= 0,
+			.start_charging_max_c	= 45,
+			.charging_min_c		= 0,
+			.charging_max_c		= 60,
+			.discharging_min_c	= 0,
+			.discharging_max_c	= 75,
+		},
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
+
+const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_POWER_TECH;
+
+enum battery_present battery_hw_present(void)
+{
+	enum gpio_signal batt_pres;
+
+	if (get_board_id() == 1)
+		batt_pres = GPIO_ID_1_EC_BATT_PRES_ODL;
+	else
+		batt_pres = GPIO_EC_BATT_PRES_ODL;
+
+	/* The GPIO is low when the battery is physically present */
+	return gpio_get_level(batt_pres) ? BP_NO : BP_YES;
+}
diff --git a/board/vell/board.c b/board/vell/board.c
new file mode 100644
index 0000000000..6776cc3f7f
--- /dev/null
+++ b/board/vell/board.c
@@ -0,0 +1,108 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "battery.h"
+#include "button.h"
+#include "charge_ramp.h"
+#include "charger.h"
+#include "common.h"
+#include "compile_time_macros.h"
+#include "console.h"
+#include "gpio.h"
+#include "gpio_signal.h"
+#include "hooks.h"
+#include "driver/accel_lis2dw12.h"
+#include "driver/accelgyro_lsm6dso.h"
+#include "driver/als_tcs3400.h"
+#include "fw_config.h"
+#include "hooks.h"
+#include "lid_switch.h"
+#include "power_button.h"
+#include "power.h"
+#include "registers.h"
+#include "switch.h"
+#include "tablet_mode.h"
+#include "throttle_ap.h"
+#include "usbc_config.h"
+
+#include "gpio_list.h" /* Must come after other header files. */
+
+/* Console output macros */
+#define CPRINTF(format, args...) cprintf(CC_CHARGER, format, ## args)
+#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
+
+__override void board_cbi_init(void)
+{
+	config_usb_db_type();
+}
+
+/* Called on AP S3 -> S0 transition */
+static void board_chipset_resume(void)
+{
+	/* Allow keyboard backlight to be enabled */
+
+	if (get_board_id() == 1)
+		gpio_set_level(GPIO_ID_1_EC_KB_BL_EN, 1);
+	else
+		gpio_set_level(GPIO_EC_KB_BL_EN_L, 0);
+}
+DECLARE_HOOK(HOOK_CHIPSET_RESUME, board_chipset_resume, HOOK_PRIO_DEFAULT);
+
+/* Called on AP S0 -> S3 transition */
+static void board_chipset_suspend(void)
+{
+	/* Turn off the keyboard backlight if it's on. */
+
+	if (get_board_id() == 1)
+		gpio_set_level(GPIO_ID_1_EC_KB_BL_EN, 0);
+	else
+		gpio_set_level(GPIO_EC_KB_BL_EN_L, 1);
+}
+DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);
+
+/*
+ * Explicitly apply the board ID 1 *gpio.inc settings to pins that
+ * were reassigned on current boards.
+ */
+
+static void set_board_id_1_gpios(void)
+{
+	if (get_board_id() != 1)
+		return;
+
+	gpio_set_flags(GPIO_ID_1_EC_KB_BL_EN, GPIO_OUT_LOW);
+}
+DECLARE_HOOK(HOOK_INIT, set_board_id_1_gpios, HOOK_PRIO_FIRST);
+
+/*
+ * Reclaim GPIO pins on board ID 1 that are used as ADC inputs on
+ * current boards. ALT function group MODULE_ADC pins are set in
+ * HOOK_PRIO_INIT_ADC and can be reclaimed right after the hook runs.
+ */
+
+static void board_id_1_reclaim_adc(void)
+{
+	if (get_board_id() != 1)
+		return;
+
+	/*
+	 * GPIO_ID_1_USB_C0_C2_TCPC_RST_ODL is on GPIO34
+	 *
+	 * The TCPC has already been reset by board_tcpc_init() executed
+	 * from HOOK_PRIO_INIT_CHIPSET. Later, the pin gets set to ADC6
+	 * in HOOK_PRIO_INIT_ADC, so we simply need to set the pin back
+	 * to GPIO34.
+	 */
+	gpio_set_flags(GPIO_ID_1_USB_C0_C2_TCPC_RST_ODL, GPIO_ODR_HIGH);
+	gpio_set_alternate_function(GPIO_PORT_3, BIT(4), GPIO_ALT_FUNC_NONE);
+
+	/*
+	 * The pin gets set to ADC7 in HOOK_PRIO_INIT_ADC, so we simply
+	 * need to set it back to GPIOE1.
+	 */
+	gpio_set_flags(GPIO_ID_1_EC_BATT_PRES_ODL, GPIO_INPUT);
+	gpio_set_alternate_function(GPIO_PORT_E, BIT(1), GPIO_ALT_FUNC_NONE);
+}
+DECLARE_HOOK(HOOK_INIT, board_id_1_reclaim_adc, HOOK_PRIO_INIT_ADC + 1);
diff --git a/board/vell/board.h b/board/vell/board.h
new file mode 100644
index 0000000000..10c5849408
--- /dev/null
+++ b/board/vell/board.h
@@ -0,0 +1,286 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Brya board configuration */
+
+#ifndef __CROS_EC_BOARD_H
+#define __CROS_EC_BOARD_H
+
+#include "compile_time_macros.h"
+
+/*
+ * Early brya boards are not set up for vivaldi
+ */
+#undef CONFIG_KEYBOARD_VIVALDI
+
+/* Baseboard features */
+#include "baseboard.h"
+
+/*
+ * This will happen automatically on NPCX9 ES2 and later. Do not remove
+ * until we can confirm all earlier chips are out of service.
+ */
+#define CONFIG_HIBERNATE_PSL_VCC1_RST_WAKEUP
+
+#define CONFIG_MP2964
+
+/* LED */
+#define CONFIG_LED_PWM
+#define CONFIG_LED_PWM_COUNT 2
+#undef CONFIG_LED_PWM_NEAR_FULL_COLOR
+#undef CONFIG_LED_PWM_SOC_ON_COLOR
+#undef CONFIG_LED_PWM_SOC_SUSPEND_COLOR
+#undef CONFIG_LED_PWM_LOW_BATT_COLOR
+#define CONFIG_LED_PWM_NEAR_FULL_COLOR EC_LED_COLOR_WHITE
+#define CONFIG_LED_PWM_SOC_ON_COLOR EC_LED_COLOR_WHITE
+#define CONFIG_LED_PWM_SOC_SUSPEND_COLOR EC_LED_COLOR_WHITE
+#define CONFIG_LED_PWM_LOW_BATT_COLOR EC_LED_COLOR_AMBER
+
+/* Sensors */
+#define CONFIG_ACCELGYRO_LSM6DSO	/* Base accel */
+#define CONFIG_ACCEL_LSM6DSO_INT_EVENT \
+	TASK_EVENT_MOTION_SENSOR_INTERRUPT(BASE_ACCEL)
+
+/* TCS3400 ALS */
+#define CONFIG_ALS
+#define ALS_COUNT 1
+#define CONFIG_ALS_TCS3400
+#define CONFIG_ALS_TCS3400_INT_EVENT \
+	TASK_EVENT_MOTION_SENSOR_INTERRUPT(CLEAR_ALS)
+
+/* Enable sensor fifo, must also define the _SIZE and _THRES */
+#define CONFIG_ACCEL_FIFO
+/* FIFO size is in power of 2. */
+#define CONFIG_ACCEL_FIFO_SIZE 256
+/* Depends on how fast the AP boots and typical ODRs */
+#define CONFIG_ACCEL_FIFO_THRES (CONFIG_ACCEL_FIFO_SIZE / 3)
+
+/* Sensors without hardware FIFO are in forced mode */
+#define CONFIG_ACCEL_FORCE_MODE_MASK \
+	(BIT(LID_ACCEL) | BIT(CLEAR_ALS))
+
+/* Lid accel */
+#define CONFIG_LID_ANGLE
+#define CONFIG_LID_ANGLE_UPDATE
+#define CONFIG_LID_ANGLE_SENSOR_BASE	BASE_ACCEL
+#define CONFIG_LID_ANGLE_SENSOR_LID	LID_ACCEL
+#define CONFIG_ACCEL_LIS2DWL
+#define CONFIG_ACCEL_LIS2DW_AS_BASE
+#define CONFIG_ACCEL_LIS2DW12_INT_EVENT \
+	TASK_EVENT_MOTION_SENSOR_INTERRUPT(LID_ACCEL)
+
+#define CONFIG_ACCEL_INTERRUPTS
+
+/* Sensor console commands */
+#define CONFIG_CMD_ACCELS
+#define CONFIG_CMD_ACCEL_INFO
+
+/* USB Type A Features */
+#define USB_PORT_COUNT			1
+#define CONFIG_USB_PORT_POWER_DUMB
+
+/* USB Type C and USB PD defines */
+#define CONFIG_USB_PD_REQUIRE_AP_MODE_ENTRY
+
+#define CONFIG_IO_EXPANDER
+#define CONFIG_IO_EXPANDER_NCT38XX
+#define CONFIG_IO_EXPANDER_PORT_COUNT		4
+
+#define CONFIG_USB_PD_TCPM_PS8815
+#define CONFIG_USB_PD_TCPM_PS8815_FORCE_DID
+#define CONFIG_USBC_RETIMER_INTEL_BB
+
+/* I2C speed console command */
+#define CONFIG_CMD_I2C_SPEED
+
+/* I2C control host command */
+#define CONFIG_HOSTCMD_I2C_CONTROL
+
+#define CONFIG_USBC_PPC_SYV682X
+#define CONFIG_USBC_PPC_NX20P3483
+
+/* TODO: b/177608416 - measure and check these values on brya */
+#define PD_POWER_SUPPLY_TURN_ON_DELAY	30000 /* us */
+#define PD_POWER_SUPPLY_TURN_OFF_DELAY	30000 /* us */
+#define PD_VCONN_SWAP_DELAY		5000 /* us */
+
+/*
+ * Passive USB-C cables only support up to 60W.
+ */
+#define PD_OPERATING_POWER_MW	15000
+#define PD_MAX_POWER_MW		60000
+#define PD_MAX_CURRENT_MA	3000
+#define PD_MAX_VOLTAGE_MV	20000
+
+/*
+ * Macros for GPIO signals used in common code that don't match the
+ * schematic names. Signal names in gpio.inc match the schematic and are
+ * then redefined here to so it's more clear which signal is being used for
+ * which purpose.
+ */
+#define GPIO_AC_PRESENT			GPIO_ACOK_OD
+#define GPIO_CPU_PROCHOT		GPIO_EC_PROCHOT_ODL
+#define GPIO_EC_INT_L			GPIO_EC_PCH_INT_ODL
+#define GPIO_ENABLE_BACKLIGHT		GPIO_EC_EN_EDP_BL
+#define GPIO_ENTERING_RW		GPIO_EC_ENTERING_RW
+#define GPIO_KBD_KSO2			GPIO_EC_KSO_02_INV
+#define GPIO_PACKET_MODE_EN		GPIO_EC_GSC_PACKET_MODE
+#define GPIO_PCH_PWRBTN_L		GPIO_EC_PCH_PWR_BTN_ODL
+#define GPIO_PCH_RSMRST_L		GPIO_EC_PCH_RSMRST_L
+#define GPIO_PCH_RTCRST			GPIO_EC_PCH_RTCRST
+#define GPIO_PCH_SLP_S0_L		GPIO_SYS_SLP_S0IX_L
+#define GPIO_PCH_SLP_S3_L		GPIO_SLP_S3_L
+#define GMR_TABLET_MODE_GPIO_L		GPIO_TABLET_MODE_L
+
+/*
+ * GPIO_EC_PCH_INT_ODL is used for MKBP events as well as a PCH wakeup
+ * signal.
+ */
+#define GPIO_PCH_WAKE_L			GPIO_EC_PCH_INT_ODL
+#define GPIO_PG_EC_ALL_SYS_PWRGD	GPIO_SEQ_EC_ALL_SYS_PG
+#define GPIO_PG_EC_DSW_PWROK		GPIO_SEQ_EC_DSW_PWROK
+#define GPIO_PG_EC_RSMRST_ODL		GPIO_SEQ_EC_RSMRST_ODL
+#define GPIO_POWER_BUTTON_L		GPIO_GSC_EC_PWR_BTN_ODL
+#define GPIO_SYS_RESET_L		GPIO_SYS_RST_ODL
+#define GPIO_VOLUME_DOWN_L		GPIO_EC_VOLDN_BTN_ODL
+#define GPIO_VOLUME_UP_L		GPIO_EC_VOLUP_BTN_ODL
+#define GPIO_WP_L			GPIO_EC_WP_ODL
+
+#define GPIO_ID_1_EC_KB_BL_EN		GPIO_EC_BATT_PRES_ODL
+
+/* System has back-lit keyboard */
+#define CONFIG_PWM_KBLIGHT
+
+/* I2C Bus Configuration */
+
+#define I2C_PORT_SENSOR		NPCX_I2C_PORT0_0
+
+#define I2C_PORT_USB_C0_C2_TCPC	NPCX_I2C_PORT1_0
+#define I2C_PORT_USB_C1_TCPC	NPCX_I2C_PORT4_1
+
+#define I2C_PORT_USB_C0_C2_PPC	NPCX_I2C_PORT2_0
+#define I2C_PORT_USB_C1_PPC	NPCX_I2C_PORT6_1
+
+#define I2C_PORT_USB_C0_C2_BC12	NPCX_I2C_PORT2_0
+#define I2C_PORT_USB_C1_BC12	NPCX_I2C_PORT6_1
+
+#define I2C_PORT_USB_C0_C2_MUX	NPCX_I2C_PORT3_0
+#define I2C_PORT_USB_C1_MUX	NPCX_I2C_PORT6_1
+
+#define I2C_PORT_BATTERY	NPCX_I2C_PORT5_0
+#define I2C_PORT_CHARGER	NPCX_I2C_PORT7_0
+#define I2C_PORT_EEPROM		NPCX_I2C_PORT7_0
+#define I2C_PORT_MP2964		NPCX_I2C_PORT7_0
+
+#define I2C_ADDR_EEPROM_FLAGS	0x50
+
+#define I2C_ADDR_MP2964_FLAGS	0x20
+
+/*
+ * see b/174768555#comment22
+ */
+#define USBC_PORT_C0_BB_RETIMER_I2C_ADDR	0x56
+#define USBC_PORT_C2_BB_RETIMER_I2C_ADDR	0x57
+
+/* Enabling Thunderbolt-compatible mode */
+#define CONFIG_USB_PD_TBT_COMPAT_MODE
+
+/* Enabling USB4 mode */
+#define CONFIG_USB_PD_USB4
+
+/* Retimer */
+#define CONFIG_USBC_RETIMER_FW_UPDATE
+
+/* Thermal features */
+#define CONFIG_THERMISTOR
+#define CONFIG_TEMP_SENSOR
+#define CONFIG_TEMP_SENSOR_POWER_GPIO	GPIO_SEQ_EC_DSW_PWROK
+#define CONFIG_STEINHART_HART_3V3_30K9_47K_4050B
+
+#define CONFIG_FANS			FAN_CH_COUNT
+
+/* Charger defines */
+#define CONFIG_CHARGER_BQ25720
+#define CONFIG_CHARGER_BQ25720_VSYS_TH2_CUSTOM
+#define CONFIG_CHARGER_BQ25720_VSYS_TH2_DV	70
+#define CONFIG_CHARGE_RAMP_SW
+#define CONFIG_CHARGER_BQ25710_SENSE_RESISTOR		10
+#define CONFIG_CHARGER_BQ25710_SENSE_RESISTOR_AC	10
+#define CONFIG_CHARGER_BQ25710_PSYS_SENSING
+
+/*
+ * Older boards have a different ADC assignment.
+ */
+
+#define CONFIG_ADC_CHANNELS_RUNTIME_CONFIG
+
+#ifndef __ASSEMBLER__
+
+#include "gpio_signal.h"	/* needed by registers.h */
+#include "registers.h"
+#include "usbc_config.h"
+
+enum adc_channel {
+	ADC_TEMP_SENSOR_1_DDR_SOC,
+	ADC_TEMP_SENSOR_2_AMBIENT,
+	ADC_TEMP_SENSOR_3_CHARGER,
+	ADC_TEMP_SENSOR_4_WWAN,
+	ADC_CH_COUNT
+};
+
+enum temp_sensor_id {
+	TEMP_SENSOR_1_DDR_SOC,
+	TEMP_SENSOR_2_AMBIENT,
+	TEMP_SENSOR_3_CHARGER,
+	TEMP_SENSOR_4_WWAN,
+	TEMP_SENSOR_COUNT
+};
+
+enum sensor_id {
+	LID_ACCEL = 0,
+	BASE_ACCEL,
+	BASE_GYRO,
+	CLEAR_ALS,
+	RGB_ALS,
+	SENSOR_COUNT
+};
+
+enum ioex_port {
+	IOEX_C0_NCT38XX = 0,
+	IOEX_C2_NCT38XX,
+	IOEX_ID_1_C0_NCT38XX,
+	IOEX_ID_1_C2_NCT38XX,
+	IOEX_PORT_COUNT
+};
+
+enum battery_type {
+	BATTERY_POWER_TECH,
+	BATTERY_LGC011,
+	BATTERY_TYPE_COUNT
+};
+
+enum pwm_channel {
+	PWM_CH_LED2 = 0,		/* PWM0 (white charger) */
+	PWM_CH_LED3,			/* PWM1 (orange on DB) */
+	PWM_CH_LED1,			/* PWM2 (orange charger) */
+	PWM_CH_KBLIGHT,			/* PWM3 */
+	PWM_CH_FAN,			/* PWM5 */
+	PWM_CH_LED4,			/* PWM7 (white on DB) */
+	PWM_CH_COUNT
+};
+
+enum fan_channel {
+	FAN_CH_0 = 0,
+	FAN_CH_COUNT
+};
+
+enum mft_channel {
+	MFT_CH_0 = 0,
+	MFT_CH_COUNT
+};
+
+#endif /* !__ASSEMBLER__ */
+
+#endif /* __CROS_EC_BOARD_H */
diff --git a/board/vell/build.mk b/board/vell/build.mk
new file mode 100644
index 0000000000..6d1303a15a
--- /dev/null
+++ b/board/vell/build.mk
@@ -0,0 +1,26 @@
+# -*- makefile -*-
+# Copyright 2021 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# Brya board specific files build
+#
+
+CHIP:=npcx
+CHIP_FAMILY:=npcx9
+CHIP_VARIANT:=npcx9m3f
+BASEBOARD:=brya
+
+board-y=
+board-y+=battery.o
+board-y+=board.o
+board-y+=charger.o
+board-y+=fans.o
+board-y+=fw_config.o
+board-y+=i2c.o
+board-y+=keyboard.o
+board-y+=led.o
+board-y+=pwm.o
+board-y+=sensors.o
+board-y+=tune_mp2964.o
+board-y+=usbc_config.o
diff --git a/board/vell/charger.c b/board/vell/charger.c
new file mode 100644
index 0000000000..04be67147d
--- /dev/null
+++ b/board/vell/charger.c
@@ -0,0 +1,90 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+
+#include "charge_manager.h"
+#include "charge_state_v2.h"
+#include "charger.h"
+#include "compile_time_macros.h"
+#include "console.h"
+#include "driver/charger/bq25710.h"
+#include "usbc_ppc.h"
+#include "usb_pd.h"
+#include "util.h"
+
+
+#define CPRINTSUSB(format, args...) cprints(CC_USBCHARGE, format, ## args)
+#define CPRINTFUSB(format, args...) cprintf(CC_USBCHARGE, format, ## args)
+
+/* Charger Chip Configuration */
+const struct charger_config_t chg_chips[] = {
+	{
+		.i2c_port = I2C_PORT_CHARGER,
+		.i2c_addr_flags = BQ25710_SMBUS_ADDR1_FLAGS,
+		.drv = &bq25710_drv,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(chg_chips) == CHARGER_NUM);
+
+int board_set_active_charge_port(int port)
+{
+	int is_valid_port = board_is_usb_pd_port_present(port);
+	int i;
+
+	if (port == CHARGE_PORT_NONE) {
+		CPRINTSUSB("Disabling all charger ports");
+
+		/* Disable all ports. */
+		for (i = 0; i < ppc_cnt; i++) {
+			/*
+			 * Do not return early if one fails otherwise we can
+			 * get into a boot loop assertion failure.
+			 */
+			if (ppc_vbus_sink_enable(i, 0))
+				CPRINTSUSB("Disabling C%d as sink failed.", i);
+		}
+
+		return EC_SUCCESS;
+	} else if (!is_valid_port) {
+		return EC_ERROR_INVAL;
+	}
+
+	/* Check if the port is sourcing VBUS. */
+	if (ppc_is_sourcing_vbus(port)) {
+		CPRINTFUSB("Skip enable C%d", port);
+		return EC_ERROR_INVAL;
+	}
+
+	CPRINTSUSB("New charge port: C%d", port);
+
+	/*
+	 * Turn off the other ports' sink path FETs, before enabling the
+	 * requested charge port.
+	 */
+	for (i = 0; i < ppc_cnt; i++) {
+		if (i == port)
+			continue;
+
+		if (ppc_vbus_sink_enable(i, 0))
+			CPRINTSUSB("C%d: sink path disable failed.", i);
+	}
+
+	/* Enable requested charge port. */
+	if (ppc_vbus_sink_enable(port, 1)) {
+		CPRINTSUSB("C%d: sink path enable failed.", port);
+		return EC_ERROR_UNKNOWN;
+	}
+
+	return EC_SUCCESS;
+}
+
+__overridable void board_set_charge_limit(int port, int supplier, int charge_ma,
+					  int max_ma, int charge_mv)
+{
+	charge_set_input_current_limit(MAX(charge_ma,
+					   CONFIG_CHARGER_INPUT_CURRENT),
+				       charge_mv);
+}
diff --git a/board/vell/ec.tasklist b/board/vell/ec.tasklist
new file mode 100644
index 0000000000..5efc5a8d23
--- /dev/null
+++ b/board/vell/ec.tasklist
@@ -0,0 +1,31 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * See CONFIG_TASK_LIST in config.h for details.
+ *
+ * USB_CHG_Px tasks must be contiguous (see USB_CHG_PORT_TO_TASK_ID(x)).
+ * PD_Cx tasks must be contiguous (see PD_PORT_TO_TASK_ID(x))
+ */
+
+#define CONFIG_TASK_LIST \
+	TASK_ALWAYS(HOOKS, hook_task, NULL, HOOKS_TASK_STACK_SIZE) \
+	TASK_ALWAYS(CHG_RAMP, chg_ramp_task, NULL, BASEBOARD_CHG_RAMP_TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P0, usb_charger_task, 0, TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P1, usb_charger_task, 0, TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P2, usb_charger_task, 0, TASK_STACK_SIZE) \
+	TASK_ALWAYS(CHARGER, charger_task, NULL, BASEBOARD_CHARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS(MOTIONSENSE, motion_sense_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_NOTEST(KEYPROTO, keyboard_protocol_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_NOTEST(CHIPSET, chipset_task, NULL, BASEBOARD_CHIPSET_TASK_STACK_SIZE) \
+	TASK_ALWAYS(HOSTCMD, host_command_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS(CONSOLE, console_task, NULL, CONSOLE_TASK_STACK_SIZE) \
+	TASK_ALWAYS(POWERBTN, power_button_task, NULL, BASEBOARD_POWERBTN_TASK_STACK_SIZE) \
+	TASK_NOTEST(KEYSCAN, keyboard_scan_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_ALWAYS(PD_C0, pd_task, NULL, BASEBOARD_PD_TASK_STACK_SIZE) \
+	TASK_ALWAYS(PD_C1, pd_task, NULL, BASEBOARD_PD_TASK_STACK_SIZE) \
+	TASK_ALWAYS(PD_C2, pd_task, NULL, BASEBOARD_PD_TASK_STACK_SIZE) \
+	TASK_ALWAYS(PD_INT_C0, pd_shared_alert_task, (BIT(2) | BIT(0)), BASEBOARD_PD_INT_TASK_STACK_SIZE) \
+	TASK_ALWAYS(PD_INT_C1, pd_interrupt_handler_task, 1, BASEBOARD_PD_INT_TASK_STACK_SIZE)
diff --git a/board/vell/fans.c b/board/vell/fans.c
new file mode 100644
index 0000000000..021f0de8e2
--- /dev/null
+++ b/board/vell/fans.c
@@ -0,0 +1,89 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Physical fans. These are logically separate from pwm_channels. */
+
+#include "common.h"
+#include "compile_time_macros.h"
+#include "console.h"
+#include "fan_chip.h"
+#include "fan.h"
+#include "hooks.h"
+#include "pwm.h"
+
+/* MFT channels. These are logically separate from pwm_channels. */
+const struct mft_t mft_channels[] = {
+	[MFT_CH_0] = {
+		.module = NPCX_MFT_MODULE_1,
+		.clk_src = TCKC_LFCLK,
+		.pwm_id = PWM_CH_FAN,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(mft_channels) == MFT_CH_COUNT);
+
+static const struct fan_conf fan_conf_0 = {
+	.flags = FAN_USE_RPM_MODE,
+	.ch = MFT_CH_0,	/* Use MFT id to control fan */
+	.pgood_gpio = -1,
+	.enable_gpio = GPIO_EN_PP5000_FAN,
+};
+
+/*
+ * TOOD(b/181271666): thermistor placement and calibration
+ *
+ * Prototype fan spins at about 4200 RPM at 100% PWM, this
+ * is specific to board ID 2 and might also apears in later
+ * boards as well.
+ */
+static const struct fan_rpm fan_rpm_0 = {
+	.rpm_min = 2200,
+	.rpm_start = 2200,
+	.rpm_max = 4200,
+};
+
+const struct fan_t fans[FAN_CH_COUNT] = {
+	[FAN_CH_0] = {
+		.conf = &fan_conf_0,
+		.rpm = &fan_rpm_0,
+	},
+};
+
+#ifndef CONFIG_FANS
+
+/*
+ * TODO(b/181271666): use static fan speeds until fan and sensors are
+ * tuned. for now, use:
+ *
+ *   AP off:  33%
+ *   AP  on: 100%
+ */
+
+static void fan_slow(void)
+{
+	const int duty_pct = 33;
+
+	ccprints("%s: speed %d%%", __func__, duty_pct);
+
+	pwm_enable(PWM_CH_FAN, 1);
+	pwm_set_duty(PWM_CH_FAN, duty_pct);
+}
+
+static void fan_max(void)
+{
+	const int duty_pct = 100;
+
+	ccprints("%s: speed %d%%", __func__, duty_pct);
+
+	pwm_enable(PWM_CH_FAN, 1);
+	pwm_set_duty(PWM_CH_FAN, duty_pct);
+}
+
+DECLARE_HOOK(HOOK_INIT, fan_slow, HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, fan_slow, HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, fan_slow, HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_CHIPSET_RESET, fan_max, HOOK_PRIO_FIRST);
+DECLARE_HOOK(HOOK_CHIPSET_RESUME, fan_max, HOOK_PRIO_DEFAULT);
+
+#endif /* CONFIG_FANS */
diff --git a/board/vell/fw_config.c b/board/vell/fw_config.c
new file mode 100644
index 0000000000..9c28c3ca58
--- /dev/null
+++ b/board/vell/fw_config.c
@@ -0,0 +1,61 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "cbi.h"
+#include "common.h"
+#include "compile_time_macros.h"
+#include "console.h"
+#include "cros_board_info.h"
+#include "fw_config.h"
+
+#define CPRINTS(format, args...) cprints(CC_CHIPSET, format, ## args)
+
+static union brya_cbi_fw_config fw_config;
+BUILD_ASSERT(sizeof(fw_config) == sizeof(uint32_t));
+
+/*
+ * FW_CONFIG defaults for brya if the CBI.FW_CONFIG data is not
+ * initialized.
+ */
+static const union brya_cbi_fw_config fw_config_defaults = {
+	.usb_db = DB_USB3_PS8815,
+	.kb_bl = KEYBOARD_BACKLIGHT_ENABLED,
+};
+
+/****************************************************************************
+ * Brya FW_CONFIG access
+ */
+void board_init_fw_config(void)
+{
+	if (cbi_get_fw_config(&fw_config.raw_value)) {
+		CPRINTS("CBI: Read FW_CONFIG failed, using board defaults");
+		fw_config = fw_config_defaults;
+	}
+
+	if (get_board_id() == 0) {
+		/*
+		 * Early boards have a zero'd out FW_CONFIG, so replace
+		 * it with a sensible default value. If DB_USB_ABSENT2
+		 * was used as an alternate encoding of DB_USB_ABSENT to
+		 * avoid the zero check, then fix it.
+		 */
+		if (fw_config.raw_value == 0) {
+			CPRINTS("CBI: FW_CONFIG is zero, using board defaults");
+			fw_config = fw_config_defaults;
+		} else if (fw_config.usb_db == DB_USB_ABSENT2) {
+			fw_config.usb_db = DB_USB_ABSENT;
+		}
+	}
+}
+
+union brya_cbi_fw_config get_fw_config(void)
+{
+	return fw_config;
+}
+
+enum ec_cfg_usb_db_type ec_cfg_usb_db_type(void)
+{
+	return fw_config.usb_db;
+}
diff --git a/board/vell/fw_config.h b/board/vell/fw_config.h
new file mode 100644
index 0000000000..6e4eb3ef58
--- /dev/null
+++ b/board/vell/fw_config.h
@@ -0,0 +1,54 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef __BOARD_BRYA_FW_CONFIG_H_
+#define __BOARD_BRYA_FW_CONFIG_H_
+
+#include <stdint.h>
+
+/****************************************************************************
+ * CBI FW_CONFIG layout for Brya board.
+ *
+ * Source of truth is the project/brya/brya/config.star configuration file.
+ */
+
+enum ec_cfg_usb_db_type {
+	DB_USB_ABSENT = 0,
+	DB_USB3_PS8815 = 1,
+	DB_USB_ABSENT2 = 15
+};
+
+enum ec_cfg_keyboard_backlight_type {
+	KEYBOARD_BACKLIGHT_DISABLED = 0,
+	KEYBOARD_BACKLIGHT_ENABLED = 1
+};
+
+union brya_cbi_fw_config {
+	struct {
+		enum ec_cfg_usb_db_type			usb_db : 4;
+		uint32_t				sd_db : 2;
+		uint32_t				lte_db : 1;
+		enum ec_cfg_keyboard_backlight_type	kb_bl : 1;
+		uint32_t				audio : 3;
+		uint32_t				reserved_1 : 21;
+	};
+	uint32_t raw_value;
+};
+
+/**
+ * Read the cached FW_CONFIG.  Guaranteed to have valid values.
+ *
+ * @return the FW_CONFIG for the board.
+ */
+union brya_cbi_fw_config get_fw_config(void);
+
+/**
+ * Get the USB daughter board type from FW_CONFIG.
+ *
+ * @return the USB daughter board type.
+ */
+enum ec_cfg_usb_db_type ec_cfg_usb_db_type(void);
+
+#endif /* __BOARD_BRYA_FW_CONFIG_H_ */
diff --git a/board/vell/generated-gpio.inc b/board/vell/generated-gpio.inc
new file mode 100644
index 0000000000..4daa60c5c9
--- /dev/null
+++ b/board/vell/generated-gpio.inc
@@ -0,0 +1,124 @@
+/*
+ * This file was auto-generated.
+ */
+
+/* INTERRUPT GPIOs: */
+GPIO_INT(ACOK_OD,                        PIN(0, 0), GPIO_INT_BOTH | GPIO_HIB_WAKE_HIGH, extpower_interrupt)
+GPIO_INT(EC_ACCEL_INT_R_L,               PIN(8, 1), GPIO_SEL_1P8V | GPIO_INT_FALLING, lis2dw12_interrupt)
+GPIO_INT(EC_ALS_RGB_INT_R_L,             PIN(D, 4), GPIO_INT_FALLING, tcs3400_interrupt)
+GPIO_INT(EC_IMU_INT_R_L,                 PIN(5, 6), GPIO_SEL_1P8V | GPIO_INT_FALLING, lsm6dso_interrupt)
+GPIO_INT(EC_PROCHOT_IN_L,                PIN(F, 0), GPIO_INT_BOTH, throttle_ap_prochot_input_interrupt)
+GPIO_INT(EC_VOLDN_BTN_ODL,               PIN(9, 3), GPIO_INT_BOTH | GPIO_PULL_UP, button_interrupt)
+GPIO_INT(EC_VOLUP_BTN_ODL,               PIN(9, 7), GPIO_INT_BOTH | GPIO_PULL_UP, button_interrupt)
+GPIO_INT(EC_WP_ODL,                      PIN(A, 1), GPIO_INT_BOTH, switch_interrupt)
+GPIO_INT(GSC_EC_PWR_BTN_ODL,             PIN(0, 1), GPIO_INT_BOTH | GPIO_HIB_WAKE_LOW, power_button_interrupt)
+GPIO_INT(LID_OPEN,                       PIN(D, 2), GPIO_INT_BOTH | GPIO_HIB_WAKE_HIGH, lid_interrupt)
+GPIO_INT(SEQ_EC_ALL_SYS_PG,              PIN(F, 4), GPIO_INT_BOTH, power_signal_interrupt)
+GPIO_INT(SEQ_EC_DSW_PWROK,               PIN(C, 7), GPIO_INT_BOTH, power_signal_interrupt)
+GPIO_INT(SEQ_EC_RSMRST_ODL,              PIN(E, 2), GPIO_INT_BOTH, power_signal_interrupt)
+GPIO_INT(SLP_S3_L,                       PIN(A, 5), GPIO_INT_BOTH, power_signal_interrupt)
+GPIO_INT(SLP_SUS_L,                      PIN(F, 1), GPIO_INT_BOTH, power_signal_interrupt)
+GPIO_INT(SYS_SLP_S0IX_L,                 PIN(D, 5), GPIO_INT_BOTH, power_signal_interrupt)
+GPIO_INT(TABLET_MODE_L,                  PIN(9, 5), GPIO_INT_BOTH, gmr_tablet_switch_isr)
+GPIO_INT(USB_C0_BC12_INT_ODL,            PIN(C, 6), GPIO_INT_FALLING, bc12_interrupt)
+GPIO_INT(USB_C0_C2_TCPC_INT_ODL,         PIN(E, 0), GPIO_INT_FALLING, tcpc_alert_event)
+GPIO_INT(USB_C0_PPC_INT_ODL,             PIN(6, 2), GPIO_INT_FALLING, ppc_interrupt)
+GPIO_INT(USB_C0_RT_INT_ODL,              PIN(B, 1), GPIO_INT_FALLING, retimer_interrupt)
+GPIO_INT(USB_C1_BC12_INT_ODL,            PIN(5, 0), GPIO_INT_FALLING, bc12_interrupt)
+GPIO_INT(USB_C1_PPC_INT_ODL,             PIN(F, 5), GPIO_INT_FALLING, ppc_interrupt)
+GPIO_INT(USB_C1_TCPC_INT_ODL,            PIN(A, 2), GPIO_INT_FALLING, tcpc_alert_event)
+GPIO_INT(USB_C2_BC12_INT_ODL,            PIN(8, 3), GPIO_INT_FALLING, bc12_interrupt)
+GPIO_INT(USB_C2_PPC_INT_ODL,             PIN(7, 0), GPIO_INT_FALLING, ppc_interrupt)
+GPIO_INT(USB_C2_RT_INT_ODL,              PIN(4, 1), GPIO_INT_FALLING, retimer_interrupt)
+
+/* USED GPIOs: */
+GPIO(CCD_MODE_ODL,                   PIN(E, 5), GPIO_INPUT)
+GPIO(CHARGER_VAP_OTG_EN,             PIN(7, 3), GPIO_OUT_LOW)
+GPIO(CPU_C10_GATE_L,                 PIN(6, 7), GPIO_INPUT)
+GPIO(EC_BATT_PRES_ODL,               PIN(A, 3), GPIO_INPUT)
+GPIO(EC_ENTERING_RW,                 PIN(0, 3), GPIO_OUT_LOW)
+GPIO(EC_EN_EDP_BL,                   PIN(D, 3), GPIO_OUT_HIGH)
+GPIO(EC_GSC_PACKET_MODE,             PIN(7, 5), GPIO_OUT_LOW)
+GPIO(EC_I2C_BAT_SCL,                 PIN(3, 3), GPIO_INPUT)
+GPIO(EC_I2C_BAT_SDA,                 PIN(3, 6), GPIO_INPUT)
+GPIO(EC_I2C_MISC_SCL_R,              PIN(B, 3), GPIO_INPUT)
+GPIO(EC_I2C_MISC_SDA_R,              PIN(B, 2), GPIO_INPUT)
+GPIO(EC_I2C_SENSOR_SCL,              PIN(B, 5), GPIO_INPUT | GPIO_SEL_1P8V)
+GPIO(EC_I2C_SENSOR_SDA,              PIN(B, 4), GPIO_INPUT | GPIO_SEL_1P8V)
+GPIO(EC_I2C_USB_C0_C2_PPC_BC_SCL,    PIN(9, 2), GPIO_INPUT)
+GPIO(EC_I2C_USB_C0_C2_PPC_BC_SDA,    PIN(9, 1), GPIO_INPUT)
+GPIO(EC_I2C_USB_C0_C2_RT_SCL,        PIN(D, 1), GPIO_INPUT)
+GPIO(EC_I2C_USB_C0_C2_RT_SDA,        PIN(D, 0), GPIO_INPUT)
+GPIO(EC_I2C_USB_C0_C2_TCPC_SCL,      PIN(9, 0), GPIO_INPUT)
+GPIO(EC_I2C_USB_C0_C2_TCPC_SDA,      PIN(8, 7), GPIO_INPUT)
+GPIO(EC_I2C_USB_C1_MIX_SCL,          PIN(E, 4), GPIO_INPUT)
+GPIO(EC_I2C_USB_C1_MIX_SDA,          PIN(E, 3), GPIO_INPUT)
+GPIO(EC_I2C_USB_C1_TCPC_SCL,         PIN(F, 3), GPIO_INPUT)
+GPIO(EC_I2C_USB_C1_TCPC_SDA,         PIN(F, 2), GPIO_INPUT)
+GPIO(EC_KB_BL_EN_L,                  PIN(8, 6), GPIO_OUT_HIGH)
+GPIO(EC_PCHHOT_ODL,                  PIN(7, 4), GPIO_INPUT)
+GPIO(EC_PCH_INT_ODL,                 PIN(B, 0), GPIO_ODR_HIGH)
+GPIO(EC_PCH_PWR_BTN_ODL,             PIN(C, 1), GPIO_ODR_HIGH)
+GPIO(EC_PCH_RSMRST_L,                PIN(A, 6), GPIO_OUT_LOW)
+GPIO(EC_PCH_RTCRST,                  PIN(7, 6), GPIO_OUT_LOW)
+GPIO(EC_PCH_SYS_PWROK,               PIN(3, 7), GPIO_OUT_LOW)
+GPIO(EC_PCH_WAKE_R_ODL,              PIN(C, 0), GPIO_ODR_HIGH)
+GPIO(EC_PROCHOT_ODL,                 PIN(6, 3), GPIO_ODR_HIGH)
+GPIO(EN_PP5000_FAN,                  PIN(6, 1), GPIO_OUT_HIGH)
+GPIO(EN_PP5000_USBA_R,               PIN(D, 7), GPIO_OUT_LOW)
+GPIO(EN_S5_RAILS,                    PIN(B, 6), GPIO_OUT_LOW)
+GPIO(IMVP9_VRRDY_OD,                 PIN(4, 3), GPIO_INPUT)
+GPIO(PCH_PWROK,                      PIN(7, 2), GPIO_OUT_LOW)
+GPIO(SYS_RST_ODL,                    PIN(C, 5), GPIO_ODR_HIGH)
+GPIO(USB_C0_C2_TCPC_RST_ODL,         PIN(A, 7), GPIO_ODR_LOW)
+GPIO(USB_C1_FRS_EN,                  PIN(9, 4), GPIO_OUT_LOW)
+GPIO(USB_C1_RST_ODL,                 PIN(9, 6), GPIO_ODR_LOW)
+GPIO(USB_C1_RT_INT_ODL,              PIN(A, 0), GPIO_INPUT)
+GPIO(USB_C1_RT_RST_R_ODL,            PIN(0, 2), GPIO_ODR_LOW)
+GPIO(VCCST_PWRGD_OD,                 PIN(A, 4), GPIO_ODR_LOW)
+
+/* UART alternate functions */
+ALTERNATE(PIN_MASK(6, 0x30), 0, MODULE_UART, 0)              /* GPIO64/CR_SIN1, GPO65/CR_SOUT1/FLPRG1_L */
+
+/* I2C alternate functions */
+ALTERNATE(PIN_MASK(3, 0x48), 0, MODULE_I2C, 0)               /* GPIO33/I2C5_SCL0/CTS_L, GPIO36/RTS_L/I2C5_SDA0 */
+ALTERNATE(PIN_MASK(8, 0x80), 0, MODULE_I2C, 0)               /* GPIO87/I2C1_SDA0 */
+ALTERNATE(PIN_MASK(9, 0x07), 0, MODULE_I2C, 0)               /* GPIO92/I2C2_SCL0, GPIO91/I2C2_SDA0, GPIO90/I2C1_SCL0 */
+ALTERNATE(PIN_MASK(B, 0x0c), 0, MODULE_I2C, 0)               /* GPIOB3/I2C7_SCL0/DCD_L, GPIOB2/I2C7_SDA0/DSR_L */
+ALTERNATE(PIN_MASK(B, 0x30), 0, MODULE_I2C, GPIO_SEL_1P8V)   /* GPIOB5/I2C0_SCL0, GPIOB4/I2C0_SDA0 */
+ALTERNATE(PIN_MASK(D, 0x03), 0, MODULE_I2C, 0)               /* GPIOD1/I2C3_SCL0, GPIOD0/I2C3_SDA0 */
+ALTERNATE(PIN_MASK(E, 0x18), 0, MODULE_I2C, 0)               /* GPIOE4/I2C6_SCL1/I3C_SCL, GPIOE3/I2C6_SDA1/I3C_SDA */
+ALTERNATE(PIN_MASK(F, 0x0c), 0, MODULE_I2C, 0)               /* GPIOF3/I2C4_SCL1, GPIOF2/I2C4_SDA1 */
+
+/* PWM alternate functions */
+ALTERNATE(PIN_MASK(4, 0x01), 0, MODULE_PWM, 0)               /* GPIO40/TA1 */
+ALTERNATE(PIN_MASK(6, 0x01), 0, MODULE_PWM, 0)               /* GPIO60/PWM7 */
+ALTERNATE(PIN_MASK(8, 0x01), 0, MODULE_PWM, 0)               /* GPIO80/PWM3 */
+ALTERNATE(PIN_MASK(B, 0x80), 0, MODULE_PWM, 0)               /* GPIOB7/PWM5 */
+ALTERNATE(PIN_MASK(C, 0x1c), 0, MODULE_PWM, 0)               /* GPIOC4/PWM2, GPIOC3/PWM0, GPIOC2/PWM1/I2C6_SCL0 */
+
+/* ADC alternate functions */
+ALTERNATE(PIN_MASK(3, 0x10), 0, MODULE_ADC, 0)               /* GPIO34/PS2_DAT2/ADC6 */
+ALTERNATE(PIN_MASK(4, 0x34), 0, MODULE_ADC, 0)               /* GPIO42/ADC3/RI_L, GPIO45/ADC0, GPIO44/ADC1 */
+ALTERNATE(PIN_MASK(E, 0x02), 0, MODULE_ADC, 0)               /* GPIOE1/ADC7 */
+
+/* KB alternate functions */
+ALTERNATE(PIN_MASK(0, 0xf0), 0, MODULE_KB, GPIO_ODR_HIGH)    /* KSO10&P80_CLK/GPIO07, KSO11&P80_DAT/GPIO06, KSO12/GPIO05, KSO13/GPIO04 */
+ALTERNATE(PIN_MASK(1, 0x7f), 0, MODULE_KB, GPIO_ODR_HIGH)    /* KSO06/GPO13/GP_SEL_L, KSO07/GPO12/JEN_L, KSO03/GPIO16/JTAG_TDO0_SWO, KSO04/GPIO15/XNOR, KSO05/GPIO14, KSO08/GPIO11/CR_SOUT1, KSO09/GPIO10/CR_SIN1 */
+ALTERNATE(PIN_MASK(2, 0xfc), 0, MODULE_KB, GPIO_INPUT | GPIO_PULL_UP) /* KSI2/GPIO27/TRACEDATA1, KSI3/GPIO26/TRACEDATA0, KSI4/GPIO25/TRACECLK/GP_SCLK, KSI5/GPIO24/GP_MISO, KSI6/GPIO23/S_SBUB, KSI7/GPIO22/S_SBUA */
+ALTERNATE(PIN_MASK(2, 0x03), 0, MODULE_KB, GPIO_ODR_HIGH)    /* KSO00/GPIO21/JTAG_TCK_SWCLK, KSO01/GPIO20/JTAG_TMS_SWIO */
+ALTERNATE(PIN_MASK(3, 0x03), 0, MODULE_KB, GPIO_INPUT | GPIO_PULL_UP) /* KSI0/GPIO31/TRACEDATA3/GP_MOSI, KSI1/GPIO30/TRACEDATA2/GP_CS_L */
+ALTERNATE(PIN_MASK(8, 0x04), 0, MODULE_KB, GPIO_ODR_HIGH)    /* KSO14/GPIO82 */
+
+/* PMU alternate functions */
+ALTERNATE(PIN_MASK(0, 0x01), 0, MODULE_PMU, GPIO_INT_BOTH | GPIO_HIB_WAKE_HIGH) /* PSL_IN2_L&GPI00/GPIO00 */
+ALTERNATE(PIN_MASK(0, 0x02), 0, MODULE_PMU, GPIO_INT_BOTH | GPIO_HIB_WAKE_LOW) /* GPIO01/PSL_IN3_L&GPI01 */
+ALTERNATE(PIN_MASK(D, 0x04), 0, MODULE_PMU, GPIO_INT_BOTH | GPIO_HIB_WAKE_HIGH) /* PSL_IN1_L&GPID2/GPIOD2 */
+
+/* Unused Pins */
+UNUSED(PIN(D, 6))       /* GPOD6/CR_SOUT3/SHDF_ESPI_L */
+UNUSED(PIN(3, 2))       /* GPO32/TRIS_L */
+UNUSED(PIN(3, 5))       /* GPO35/CR_SOUT4/TEST_L */
+UNUSED(PIN(6, 6))       /* GPIO66 */
+
+/* Pre-configured PSL balls:  J8  K6 */
diff --git a/board/vell/gpio.inc b/board/vell/gpio.inc
new file mode 100644
index 0000000000..79a97b0475
--- /dev/null
+++ b/board/vell/gpio.inc
@@ -0,0 +1,74 @@
+/* -*- mode:c -*-
+ *
+ * Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#define MODULE_KB		MODULE_KEYBOARD_SCAN
+
+/*
+ * Generated-gpio.inc is produced using a Brya specific tool that
+ * parses the GPIO definitions derived from the board schematics and
+ * EC pinout descriptions derived form the chip datasheets to generate
+ * the Chrome EC GPIO pinout definitions. Due to the confidential
+ * nature of schematics and datasheets, they are not provided here.
+ *
+ * Variants that do not auto-generate their GPIO definitions should
+ * combine the Brya gpio.inc and generated-gpio.inc into their
+ * gpio.inc and customize as appropriate.
+ */
+
+#include "generated-gpio.inc"
+
+/*
+ * The NPCX keyboard driver does not use named GPIOs to access
+ * keyboard scan pins, so we do not list them in *gpio.inc. However, when
+ * KEYBOARD_COL2_INVERTED is defined, this name is required.
+ */
+GPIO(EC_KSO_02_INV,               PIN(1, 7), GPIO_OUT_LOW)
+
+/*
+ * GPIOE1 is an ALT function ADC INPUT on board ID 2 and a GPIO INPUT on
+ * board ID 1. This declaration gives us a signal name to use on board
+ * ID 1.
+ */
+GPIO(ID_1_EC_BATT_PRES_ODL,       PIN(E, 1), GPIO_INPUT)
+
+/*
+ * GPIO34 is an INPUT on board ID 2 and ODR_LOW on board ID 1.
+ *
+ * Since this pin is pulled up to 3.3V through a 30.9K ohm resistor on
+ * board ID 2, we will leak about 0.3mW until the pin is put in ALT mode
+ * when MODULE_ADC configuration runs. Initializing the pin to ODR_LOW
+ * gives us full control on both boards.
+ */
+GPIO(ID_1_USB_C0_C2_TCPC_RST_ODL, PIN(3, 4), GPIO_ODR_LOW)
+
+/* Board ID 1 IO expander configuration */
+
+IOEX(ID_1_USB_C0_RT_RST_ODL, EXPIN(IOEX_ID_1_C0_NCT38XX, 0, 2), GPIO_ODR_LOW)
+/* GPIO03_P1 to PU */
+IOEX(ID_1_USB_C0_FRS_EN,     EXPIN(IOEX_ID_1_C0_NCT38XX, 0, 4), GPIO_LOW)
+IOEX(ID_1_USB_C0_OC_ODL,     EXPIN(IOEX_ID_1_C0_NCT38XX, 0, 6), GPIO_ODR_HIGH)
+/* GPIO07_P1 to PU */
+
+IOEX(ID_1_USB_C2_RT_RST_ODL, EXPIN(IOEX_ID_1_C2_NCT38XX, 0, 2), GPIO_ODR_LOW)
+/* GPIO03_P2 to PU */
+IOEX(ID_1_USB_C2_FRS_EN,     EXPIN(IOEX_ID_1_C2_NCT38XX, 0, 4), GPIO_LOW)
+IOEX(ID_1_USB_C1_OC_ODL,     EXPIN(IOEX_ID_1_C2_NCT38XX, 0, 6), GPIO_ODR_HIGH)
+IOEX(ID_1_USB_C2_OC_ODL,     EXPIN(IOEX_ID_1_C2_NCT38XX, 0, 7), GPIO_ODR_HIGH)
+
+/* Board ID 2 IO expander configuration */
+
+/* GPIO02_P2 to PU */
+/* GPIO03_P2 to PU */
+IOEX(USB_C0_OC_ODL,          EXPIN(IOEX_C0_NCT38XX, 0, 4), GPIO_ODR_HIGH)
+IOEX(USB_C0_FRS_EN,          EXPIN(IOEX_C0_NCT38XX, 0, 6), GPIO_LOW)
+IOEX(USB_C0_RT_RST_ODL,      EXPIN(IOEX_C0_NCT38XX, 0, 7), GPIO_ODR_LOW)
+
+IOEX(USB_C2_RT_RST_ODL,      EXPIN(IOEX_C2_NCT38XX, 0, 2), GPIO_ODR_LOW)
+IOEX(USB_C1_OC_ODL,          EXPIN(IOEX_C2_NCT38XX, 0, 3), GPIO_ODR_HIGH)
+IOEX(USB_C2_OC_ODL,          EXPIN(IOEX_C2_NCT38XX, 0, 4), GPIO_ODR_HIGH)
+IOEX(USB_C2_FRS_EN,          EXPIN(IOEX_C2_NCT38XX, 0, 6), GPIO_LOW)
+/* GPIO07_P2 to PU */
diff --git a/board/vell/i2c.c b/board/vell/i2c.c
new file mode 100644
index 0000000000..3db2e0c17b
--- /dev/null
+++ b/board/vell/i2c.c
@@ -0,0 +1,98 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+#include "compile_time_macros.h"
+#include "hooks.h"
+#include "i2c.h"
+
+#define BOARD_ID_FAST_PLUS_CAPABLE	2
+
+/* I2C port map configuration */
+const struct i2c_port_t i2c_ports[] = {
+	{
+		/* I2C0 */
+		.name = "sensor",
+		.port = I2C_PORT_SENSOR,
+		.kbps = 400,
+		.scl = GPIO_EC_I2C_SENSOR_SCL,
+		.sda = GPIO_EC_I2C_SENSOR_SDA,
+	},
+	{
+		/* I2C1 */
+		.name = "tcpc0,2",
+		.port = I2C_PORT_USB_C0_C2_TCPC,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C0_C2_TCPC_SCL,
+		.sda = GPIO_EC_I2C_USB_C0_C2_TCPC_SDA,
+	},
+	{
+		/* I2C2 */
+		.name = "ppc0,2",
+		.port = I2C_PORT_USB_C0_C2_PPC,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C0_C2_PPC_BC_SCL,
+		.sda = GPIO_EC_I2C_USB_C0_C2_PPC_BC_SDA,
+	},
+	{
+		/* I2C3 */
+		.name = "retimer0,2",
+		.port = I2C_PORT_USB_C0_C2_MUX,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C0_C2_RT_SCL,
+		.sda = GPIO_EC_I2C_USB_C0_C2_RT_SDA,
+	},
+	{
+		/* I2C4 C1 TCPC */
+		.name = "tcpc1",
+		.port = I2C_PORT_USB_C1_TCPC,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C1_TCPC_SCL,
+		.sda = GPIO_EC_I2C_USB_C1_TCPC_SDA,
+		.flags = I2C_PORT_FLAG_DYNAMIC_SPEED,
+	},
+	{
+		/* I2C5 */
+		.name = "battery",
+		.port = I2C_PORT_BATTERY,
+		.kbps = 100,
+		.scl = GPIO_EC_I2C_BAT_SCL,
+		.sda = GPIO_EC_I2C_BAT_SDA,
+	},
+	{
+		/* I2C6 */
+		.name = "ppc1",
+		.port = I2C_PORT_USB_C1_PPC,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C1_MIX_SCL,
+		.sda = GPIO_EC_I2C_USB_C1_MIX_SDA,
+		.flags = I2C_PORT_FLAG_DYNAMIC_SPEED,
+	},
+	{
+		/* I2C7 */
+		.name = "eeprom",
+		.port = I2C_PORT_EEPROM,
+		.kbps = 400,
+		.scl = GPIO_EC_I2C_MISC_SCL_R,
+		.sda = GPIO_EC_I2C_MISC_SDA_R,
+	},
+};
+const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
+
+/*
+ * I2C controllers are initialized in main.c. This sets the speed much
+ * later, but before I2C peripherals are initialized.
+ */
+static void set_board_legacy_i2c_speeds(void)
+{
+	if (get_board_id() >= BOARD_ID_FAST_PLUS_CAPABLE)
+		return;
+
+	ccprints("setting USB DB I2C buses to 400 kHz\n");
+
+	i2c_set_freq(I2C_PORT_USB_C1_TCPC, I2C_FREQ_400KHZ);
+	i2c_set_freq(I2C_PORT_USB_C1_PPC, I2C_FREQ_400KHZ);
+}
+DECLARE_HOOK(HOOK_INIT, set_board_legacy_i2c_speeds, HOOK_PRIO_INIT_I2C - 1);
diff --git a/board/vell/keyboard.c b/board/vell/keyboard.c
new file mode 100644
index 0000000000..a9f033130d
--- /dev/null
+++ b/board/vell/keyboard.c
@@ -0,0 +1,25 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+
+#include "keyboard_scan.h"
+#include "timer.h"
+
+/* Keyboard scan setting */
+__override struct keyboard_scan_config keyscan_config = {
+	/* Increase from 50 us, because KSO_02 passes through the H1. */
+	.output_settle_us = 80,
+	/* Other values should be the same as the default configuration. */
+	.debounce_down_us = 9 * MSEC,
+	.debounce_up_us = 30 * MSEC,
+	.scan_period_us = 3 * MSEC,
+	.min_post_scan_delay_us = 1000,
+	.poll_timeout_us = 100 * MSEC,
+	.actual_key_mask = {
+		0x14, 0xff, 0xff, 0xff, 0xff, 0xf5, 0xff,
+		0xa4, 0xff, 0xfe, 0x55, 0xfa, 0xca  /* full set */
+	},
+};
diff --git a/board/vell/led.c b/board/vell/led.c
new file mode 100644
index 0000000000..68945ec79e
--- /dev/null
+++ b/board/vell/led.c
@@ -0,0 +1,93 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Brya specific PWM LED settings: there are 2 LEDs on each side of the board,
+ * each one can be controlled separately. The LED colors are white or amber,
+ * and the default behavior is tied to the charging process: both sides are
+ * amber while charging the battery and white when the battery is charged.
+ */
+
+#include <stdint.h>
+
+#include "common.h"
+#include "compile_time_macros.h"
+#include "ec_commands.h"
+#include "led_pwm.h"
+#include "pwm.h"
+#include "util.h"
+
+const enum ec_led_id supported_led_ids[] = {
+	EC_LED_ID_LEFT_LED,
+	EC_LED_ID_RIGHT_LED,
+};
+
+const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
+
+/*
+ * We only have a white and an amber LED, so setting any other color results in
+ * both LEDs being off.
+ */
+struct pwm_led_color_map led_color_map[EC_LED_COLOR_COUNT] = {
+				/* Amber, White */
+	[EC_LED_COLOR_RED]    = {   0,   0 },
+	[EC_LED_COLOR_GREEN]  = {   0,   0 },
+	[EC_LED_COLOR_BLUE]   = {   0,   0 },
+	[EC_LED_COLOR_YELLOW] = {   0,   0 },
+	[EC_LED_COLOR_WHITE]  = {   0, 100 },
+	[EC_LED_COLOR_AMBER]  = {  100,  0 },
+};
+
+/* Two logical LEDs with amber and white channels. */
+struct pwm_led pwm_leds[CONFIG_LED_PWM_COUNT] = {
+	{
+		.ch0 = PWM_CH_LED1,
+		.ch1 = PWM_CH_LED2,
+		.ch2 = PWM_LED_NO_CHANNEL,
+		.enable = &pwm_enable,
+		.set_duty = &pwm_set_duty,
+	},
+	{
+		.ch0 = PWM_CH_LED3,
+		.ch1 = PWM_CH_LED4,
+		.ch2 = PWM_LED_NO_CHANNEL,
+		.enable = &pwm_enable,
+		.set_duty = &pwm_set_duty,
+	},
+};
+
+void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
+{
+	memset(brightness_range, '\0',
+	       sizeof(*brightness_range) * EC_LED_COLOR_COUNT);
+	brightness_range[EC_LED_COLOR_AMBER] = 100;
+	brightness_range[EC_LED_COLOR_WHITE] = 100;
+}
+
+int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
+{
+	enum pwm_led_id pwm_id;
+
+	/* Convert ec_led_id to pwm_led_id. */
+	switch (led_id) {
+	case EC_LED_ID_LEFT_LED:
+		pwm_id = PWM_LED0;
+		break;
+	case EC_LED_ID_RIGHT_LED:
+		pwm_id = PWM_LED1;
+		break;
+	default:
+		return EC_ERROR_UNKNOWN;
+	}
+
+	if (brightness[EC_LED_COLOR_WHITE])
+		set_pwm_led_color(pwm_id, EC_LED_COLOR_WHITE);
+	else if (brightness[EC_LED_COLOR_AMBER])
+		set_pwm_led_color(pwm_id, EC_LED_COLOR_AMBER);
+	else
+		/* Otherwise, the "color" is "off". */
+		set_pwm_led_color(pwm_id, -1);
+
+	return EC_SUCCESS;
+}
diff --git a/board/vell/pwm.c b/board/vell/pwm.c
new file mode 100644
index 0000000000..6e662f8e7d
--- /dev/null
+++ b/board/vell/pwm.c
@@ -0,0 +1,71 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+
+#include "compile_time_macros.h"
+#include "hooks.h"
+#include "pwm.h"
+#include "pwm_chip.h"
+
+const struct pwm_t pwm_channels[] = {
+	[PWM_CH_LED2] = {
+		.channel = 0,
+		.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
+		.freq = 4800,
+	},
+	[PWM_CH_LED3] = {
+		.channel = 1,
+		.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
+		.freq = 4800,
+	},
+	[PWM_CH_LED1] = {
+		.channel = 2,
+		.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
+		.freq = 4800,
+	},
+	[PWM_CH_KBLIGHT] = {
+		.channel = 3,
+		.flags = 0,
+		/*
+		 * Set PWM frequency to multiple of 50 Hz and 60 Hz to prevent
+		 * flicker. Higher frequencies consume similar average power to
+		 * lower PWM frequencies, but higher frequencies record a much
+		 * lower maximum power.
+		 */
+		.freq = 2400,
+	},
+	[PWM_CH_FAN] = {
+		.channel = 5,
+		.flags = PWM_CONFIG_OPEN_DRAIN | PWM_CONFIG_DSLEEP,
+		.freq = 1000
+	},
+	[PWM_CH_LED4] = {
+		.channel = 7,
+		.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
+		.freq = 4800,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT);
+
+static void board_pwm_init(void)
+{
+	/*
+	 * Turn on all the LED at 50%.
+	 * Turn on the fan at 100%.
+	 */
+	pwm_enable(PWM_CH_LED1, 1);
+	pwm_set_duty(PWM_CH_LED1, 50);
+	pwm_enable(PWM_CH_LED2, 1);
+	pwm_set_duty(PWM_CH_LED2, 50);
+	pwm_enable(PWM_CH_LED3, 1);
+	pwm_set_duty(PWM_CH_LED3, 50);
+	pwm_enable(PWM_CH_LED4, 1);
+	pwm_set_duty(PWM_CH_LED4, 50);
+
+	pwm_enable(PWM_CH_KBLIGHT, 1);
+	pwm_set_duty(PWM_CH_KBLIGHT, 50);
+}
+DECLARE_HOOK(HOOK_INIT, board_pwm_init, HOOK_PRIO_DEFAULT);
diff --git a/board/vell/sensors.c b/board/vell/sensors.c
new file mode 100644
index 0000000000..0a4b0198bd
--- /dev/null
+++ b/board/vell/sensors.c
@@ -0,0 +1,418 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+#include "accelgyro.h"
+#include "adc.h"
+#include "driver/accel_lis2dw12.h"
+#include "driver/accelgyro_lsm6dso.h"
+#include "driver/als_tcs3400_public.h"
+#include "hooks.h"
+#include "motion_sense.h"
+#include "temp_sensor.h"
+#include "thermal.h"
+#include "temp_sensor/thermistor.h"
+
+/* ADC configuration */
+struct adc_t adc_channels[] = {
+	[ADC_TEMP_SENSOR_1_DDR_SOC] = {
+		.name = "TEMP_DDR_SOC",
+		.input_ch = NPCX_ADC_CH0,
+		.factor_mul = ADC_MAX_VOLT,
+		.factor_div = ADC_READ_MAX + 1,
+		.shift = 0,
+	},
+	[ADC_TEMP_SENSOR_2_AMBIENT] = {
+		.name = "TEMP_AMBIENT",
+		.input_ch = NPCX_ADC_CH1,
+		.factor_mul = ADC_MAX_VOLT,
+		.factor_div = ADC_READ_MAX + 1,
+		.shift = 0,
+	},
+	[ADC_TEMP_SENSOR_3_CHARGER] = {
+		.name = "TEMP_CHARGER",
+		.input_ch = NPCX_ADC_CH6,
+		.factor_mul = ADC_MAX_VOLT,
+		.factor_div = ADC_READ_MAX + 1,
+		.shift = 0,
+	},
+	[ADC_TEMP_SENSOR_4_WWAN] = {
+		.name = "TEMP_WWAN",
+		.input_ch = NPCX_ADC_CH7,
+		.factor_mul = ADC_MAX_VOLT,
+		.factor_div = ADC_READ_MAX + 1,
+		.shift = 0,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
+
+K_MUTEX_DEFINE(g_lid_accel_mutex);
+K_MUTEX_DEFINE(g_base_accel_mutex);
+static struct stprivate_data g_lis2dw12_data;
+static struct lsm6dso_data lsm6dso_data;
+
+/* TODO(b/184779333): calibrate the orientation matrix on later board stage */
+static const mat33_fp_t lid_standard_ref = {
+	{ 0, FLOAT_TO_FP(1), 0},
+	{ FLOAT_TO_FP(1), 0, 0},
+	{ 0, 0, FLOAT_TO_FP(-1)}
+};
+
+/* TODO(b/184779743): verify orientation matrix */
+static const mat33_fp_t base_standard_ref = {
+	{ FLOAT_TO_FP(1), 0, 0},
+	{ 0, FLOAT_TO_FP(-1), 0},
+	{ 0, 0, FLOAT_TO_FP(-1)}
+};
+
+/* TCS3400 private data */
+static struct als_drv_data_t g_tcs3400_data = {
+	.als_cal.scale = 1,
+	.als_cal.uscale = 0,
+	.als_cal.offset = 0,
+	.als_cal.channel_scale = {
+		.k_channel_scale = ALS_CHANNEL_SCALE(1.0), /* kc from VPD */
+		.cover_scale = ALS_CHANNEL_SCALE(1.0),     /* CT */
+	},
+};
+
+/*
+ * TODO: b/184702900 need to calibrate ALS/RGB sensor. At default settings,
+ * shining phone flashlight on sensor pegs all readings at 0xFFFF.
+ */
+static struct tcs3400_rgb_drv_data_t g_tcs3400_rgb_data = {
+	.calibration.rgb_cal[X] = {
+		.offset = 0,
+		.coeff[TCS_RED_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_GREEN_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_BLUE_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_CLEAR_COEFF_IDX] = FLOAT_TO_FP(1.0),
+		.scale = {
+			.k_channel_scale = ALS_CHANNEL_SCALE(1.0), /* kr */
+			.cover_scale = ALS_CHANNEL_SCALE(1.0)
+		}
+	},
+	.calibration.rgb_cal[Y] = {
+		.offset = 0,
+		.coeff[TCS_RED_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_GREEN_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_BLUE_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_CLEAR_COEFF_IDX] = FLOAT_TO_FP(1.0),
+		.scale = {
+			.k_channel_scale = ALS_CHANNEL_SCALE(1.0), /* kg */
+			.cover_scale = ALS_CHANNEL_SCALE(1.0)
+		},
+	},
+	.calibration.rgb_cal[Z] = {
+		.offset = 0,
+		.coeff[TCS_RED_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_GREEN_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_BLUE_COEFF_IDX] = FLOAT_TO_FP(0),
+		.coeff[TCS_CLEAR_COEFF_IDX] = FLOAT_TO_FP(1.0),
+		.scale = {
+			.k_channel_scale = ALS_CHANNEL_SCALE(1.0), /* kb */
+			.cover_scale = ALS_CHANNEL_SCALE(1.0)
+		}
+	},
+	.calibration.irt = INT_TO_FP(1),
+	.saturation.again = TCS_DEFAULT_AGAIN,
+	.saturation.atime = TCS_DEFAULT_ATIME,
+};
+
+struct motion_sensor_t motion_sensors[] = {
+	[LID_ACCEL] = {
+		.name = "Lid Accel",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_LIS2DW12,
+		.type = MOTIONSENSE_TYPE_ACCEL,
+		.location = MOTIONSENSE_LOC_LID,
+		.drv = &lis2dw12_drv,
+		.mutex = &g_lid_accel_mutex,
+		.drv_data = &g_lis2dw12_data,
+		.int_signal = GPIO_EC_ACCEL_INT_R_L,
+		.port = I2C_PORT_SENSOR,
+		.i2c_spi_addr_flags = LIS2DW12_ADDR0,
+		.flags = MOTIONSENSE_FLAG_INT_SIGNAL,
+		.rot_standard_ref = &lid_standard_ref, /* identity matrix */
+		.default_range = 2, /* g */
+		.min_frequency = LIS2DW12_ODR_MIN_VAL,
+		.max_frequency = LIS2DW12_ODR_MAX_VAL,
+		.config = {
+			/* EC use accel for angle detection */
+			[SENSOR_CONFIG_EC_S0] = {
+				.odr = 10000 | ROUND_UP_FLAG,
+			},
+			/* Sensor on for lid angle detection */
+			[SENSOR_CONFIG_EC_S3] = {
+				.odr = 10000 | ROUND_UP_FLAG,
+			},
+		},
+	},
+
+	[BASE_ACCEL] = {
+		.name = "Base Accel",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_LSM6DSO,
+		.type = MOTIONSENSE_TYPE_ACCEL,
+		.location = MOTIONSENSE_LOC_BASE,
+		.drv = &lsm6dso_drv,
+		.mutex = &g_base_accel_mutex,
+		.drv_data = LSM6DSO_ST_DATA(lsm6dso_data,
+				MOTIONSENSE_TYPE_ACCEL),
+		.int_signal = GPIO_EC_IMU_INT_R_L,
+		.flags = MOTIONSENSE_FLAG_INT_SIGNAL,
+		.port = I2C_PORT_SENSOR,
+		.i2c_spi_addr_flags = LSM6DSO_ADDR0_FLAGS,
+		.rot_standard_ref = &base_standard_ref,
+		.default_range = 4,  /* g */
+		.min_frequency = LSM6DSO_ODR_MIN_VAL,
+		.max_frequency = LSM6DSO_ODR_MAX_VAL,
+		.config = {
+			[SENSOR_CONFIG_EC_S0] = {
+				.odr = 13000 | ROUND_UP_FLAG,
+				.ec_rate = 100 * MSEC,
+			},
+			[SENSOR_CONFIG_EC_S3] = {
+				.odr = 10000 | ROUND_UP_FLAG,
+				.ec_rate = 100 * MSEC,
+			},
+		},
+	},
+
+	[BASE_GYRO] = {
+		.name = "Base Gyro",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_LSM6DSO,
+		.type = MOTIONSENSE_TYPE_GYRO,
+		.location = MOTIONSENSE_LOC_BASE,
+		.drv = &lsm6dso_drv,
+		.mutex = &g_base_accel_mutex,
+		.drv_data = LSM6DSO_ST_DATA(lsm6dso_data,
+				MOTIONSENSE_TYPE_GYRO),
+		.int_signal = GPIO_EC_IMU_INT_R_L,
+		.flags = MOTIONSENSE_FLAG_INT_SIGNAL,
+		.port = I2C_PORT_SENSOR,
+		.i2c_spi_addr_flags = LSM6DSO_ADDR0_FLAGS,
+		.default_range = 1000 | ROUND_UP_FLAG, /* dps */
+		.rot_standard_ref = &base_standard_ref,
+		.min_frequency = LSM6DSO_ODR_MIN_VAL,
+		.max_frequency = LSM6DSO_ODR_MAX_VAL,
+	},
+
+	[CLEAR_ALS] = {
+		.name = "Clear Light",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_TCS3400,
+		.type = MOTIONSENSE_TYPE_LIGHT,
+		.location = MOTIONSENSE_LOC_CAMERA,
+		.drv = &tcs3400_drv,
+		.drv_data = &g_tcs3400_data,
+		.port = I2C_PORT_SENSOR,
+		.i2c_spi_addr_flags = TCS3400_I2C_ADDR_FLAGS,
+		.rot_standard_ref = NULL,
+		.default_range = 0x10000, /* scale = 1x, uscale = 0 */
+		.min_frequency = TCS3400_LIGHT_MIN_FREQ,
+		.max_frequency = TCS3400_LIGHT_MAX_FREQ,
+		.config = {
+			/* Run ALS sensor in S0 */
+			[SENSOR_CONFIG_EC_S0] = {
+				.odr = 1000,
+			},
+		},
+	},
+
+	[RGB_ALS] = {
+		/*
+		 * RGB channels read by CLEAR_ALS and so the i2c port and
+		 * address do not need to be defined for RGB_ALS.
+		 */
+		.name = "RGB Light",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_TCS3400,
+		.type = MOTIONSENSE_TYPE_LIGHT_RGB,
+		.location = MOTIONSENSE_LOC_CAMERA,
+		.drv = &tcs3400_rgb_drv,
+		.drv_data = &g_tcs3400_rgb_data,
+		.rot_standard_ref = NULL,
+		.default_range = 0x10000, /* scale = 1x, uscale = 0 */
+	},
+};
+const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors);
+
+/* ALS instances when LPC mapping is needed. Each entry directs to a sensor. */
+const struct motion_sensor_t *motion_als_sensors[] = {
+	&motion_sensors[CLEAR_ALS],
+};
+BUILD_ASSERT(ARRAY_SIZE(motion_als_sensors) == ALS_COUNT);
+
+static void baseboard_sensors_init(void)
+{
+	/* Enable gpio interrupt for lid accel sensor */
+	gpio_enable_interrupt(GPIO_EC_ACCEL_INT_R_L);
+	/* Enable interrupt for the TCS3400 color light sensor */
+	gpio_enable_interrupt(GPIO_EC_ALS_RGB_INT_R_L);
+	/* Enable gpio interrupt for base accelgyro sensor */
+	gpio_enable_interrupt(GPIO_EC_IMU_INT_R_L);
+}
+DECLARE_HOOK(HOOK_INIT, baseboard_sensors_init, HOOK_PRIO_INIT_I2C + 1);
+
+/* Temperature sensor configuration */
+const struct temp_sensor_t temp_sensors[] = {
+	[TEMP_SENSOR_1_DDR_SOC] = {
+		.name = "DDR and SOC",
+		.type = TEMP_SENSOR_TYPE_BOARD,
+		.read = get_temp_3v3_30k9_47k_4050b,
+		.idx = ADC_TEMP_SENSOR_1_DDR_SOC,
+	},
+	[TEMP_SENSOR_2_AMBIENT] = {
+		.name = "Ambient",
+		.type = TEMP_SENSOR_TYPE_BOARD,
+		.read = get_temp_3v3_30k9_47k_4050b,
+		.idx = ADC_TEMP_SENSOR_2_AMBIENT,
+	},
+	[TEMP_SENSOR_3_CHARGER] = {
+		.name = "Charger",
+		.type = TEMP_SENSOR_TYPE_BOARD,
+		.read = get_temp_3v3_30k9_47k_4050b,
+		.idx = ADC_TEMP_SENSOR_3_CHARGER,
+	},
+	[TEMP_SENSOR_4_WWAN] = {
+		.name = "WWAN",
+		.type = TEMP_SENSOR_TYPE_BOARD,
+		.read = get_temp_3v3_30k9_47k_4050b,
+		.idx = ADC_TEMP_SENSOR_4_WWAN,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT);
+
+/*
+ * TODO(b/180681346): update for Alder Lake/brya
+ *
+ * Alder Lake specifies 100 C as maximum TDP temperature.  THRMTRIP# occurs at
+ * 130 C.  However, sensor is located next to DDR, so we need to use the lower
+ * DDR temperature limit (85 C)
+ */
+/*
+ * TODO(b/202062363): Remove when clang is fixed.
+ */
+#define THERMAL_CPU \
+	{ \
+		.temp_host = { \
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(85), \
+			[EC_TEMP_THRESH_HALT] = C_TO_K(90), \
+		}, \
+		.temp_host_release = { \
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(80), \
+		}, \
+		.temp_fan_off = C_TO_K(35), \
+		.temp_fan_max = C_TO_K(60), \
+	}
+__maybe_unused static const struct ec_thermal_config thermal_cpu = THERMAL_CPU;
+
+/*
+ * TODO(b/180681346): update for Alder Lake/brya
+ *
+ * Inductor limits - used for both charger and PP3300 regulator
+ *
+ * Need to use the lower of the charger IC, PP3300 regulator, and the inductors
+ *
+ * Charger max recommended temperature 100C, max absolute temperature 125C
+ * PP3300 regulator: operating range -40 C to 145 C
+ *
+ * Inductors: limit of 125c
+ * PCB: limit is 80c
+ */
+/*
+ * TODO(b/202062363): Remove when clang is fixed.
+ */
+#define THERMAL_AMBIENT \
+	{ \
+		.temp_host = { \
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(85), \
+			[EC_TEMP_THRESH_HALT] = C_TO_K(90), \
+		}, \
+		.temp_host_release = { \
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(80), \
+		}, \
+		.temp_fan_off = C_TO_K(35), \
+		.temp_fan_max = C_TO_K(60), \
+	}
+__maybe_unused static const struct ec_thermal_config thermal_ambient =
+	THERMAL_AMBIENT;
+
+/*
+ * Inductor limits - used for both charger and PP3300 regulator
+ *
+ * Need to use the lower of the charger IC, PP3300 regulator, and the inductors
+ *
+ * Charger max recommended temperature 125C, max absolute temperature 150C
+ * PP3300 regulator: operating range -40 C to 125 C
+ *
+ * Inductors: limit of 125c
+ * PCB: limit is 80c
+ */
+/*
+ * TODO(b/202062363): Remove when clang is fixed.
+ */
+#define THERMAL_CHARGER \
+	{ \
+		.temp_host = { \
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(105), \
+			[EC_TEMP_THRESH_HALT] = C_TO_K(120), \
+		}, \
+		.temp_host_release = { \
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(90), \
+		}, \
+		.temp_fan_off = C_TO_K(35), \
+		.temp_fan_max = C_TO_K(65), \
+	}
+__maybe_unused static const struct ec_thermal_config thermal_charger =
+	THERMAL_CHARGER;
+
+/*
+ * TODO(b/180681346): update for brya WWAN module
+ */
+/*
+ * TODO(b/202062363): Remove when clang is fixed.
+ */
+#define THERMAL_WWAN \
+	{ \
+		.temp_host = { \
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(130), \
+			[EC_TEMP_THRESH_HALT] = C_TO_K(130), \
+		}, \
+		.temp_host_release = { \
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(100), \
+		}, \
+		.temp_fan_off = C_TO_K(35), \
+		.temp_fan_max = C_TO_K(60), \
+	}
+__maybe_unused static const struct ec_thermal_config thermal_wwan =
+	THERMAL_WWAN;
+
+struct ec_thermal_config thermal_params[] = {
+	[TEMP_SENSOR_1_DDR_SOC] = THERMAL_CPU,
+	[TEMP_SENSOR_2_AMBIENT] = THERMAL_AMBIENT,
+	[TEMP_SENSOR_3_CHARGER] = THERMAL_CHARGER,
+	[TEMP_SENSOR_4_WWAN] = THERMAL_WWAN,
+};
+BUILD_ASSERT(ARRAY_SIZE(thermal_params) == TEMP_SENSOR_COUNT);
+
+static void board_thermals_init(void)
+{
+	if (get_board_id() == 1) {
+		/*
+		 * Board ID 1 only has 3 sensors and the AMBIENT sensor
+		 * ADC pins have been reassigned, so we're down to 2
+		 * sensors that can easily be configured. So, alias the
+		 * AMBIENT sensor ADC channel to the unimplemented ADC
+		 * slots.
+		 */
+		adc_channels[ADC_TEMP_SENSOR_3_CHARGER].input_ch = NPCX_ADC_CH1;
+		adc_channels[ADC_TEMP_SENSOR_4_WWAN].input_ch = NPCX_ADC_CH1;
+	}
+}
+
+DECLARE_HOOK(HOOK_INIT, board_thermals_init, HOOK_PRIO_INIT_CHIPSET);
diff --git a/board/vell/tune_mp2964.c b/board/vell/tune_mp2964.c
new file mode 100644
index 0000000000..198f06d8eb
--- /dev/null
+++ b/board/vell/tune_mp2964.c
@@ -0,0 +1,43 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Tune the MP2964 IMVP9.1 parameters for brya */
+
+#include "common.h"
+#include "compile_time_macros.h"
+#include "console.h"
+#include "hooks.h"
+#include "mp2964.h"
+
+const static struct mp2964_reg_val rail_a[] = {
+	{ MP2964_MFR_ALT_SET,     0xe081 },	/* ALERT_DELAY = 200ns */
+};
+const static struct mp2964_reg_val rail_b[] = {
+	{ MP2964_MFR_ALT_SET,     0xe081 },	/* ALERT_DELAY = 200ns */
+};
+
+static void mp2964_on_startup(void)
+{
+	static int chip_updated;
+	int status;
+
+	if (get_board_id() != 1)
+		return;
+
+	if (chip_updated)
+		return;
+
+	chip_updated = 1;
+
+	ccprintf("%s: attempting to tune PMIC\n", __func__);
+
+	status = mp2964_tune(rail_a, ARRAY_SIZE(rail_a),
+			     rail_b, ARRAY_SIZE(rail_b));
+	if (status != EC_SUCCESS)
+		ccprintf("%s: could not update all settings\n", __func__);
+}
+
+DECLARE_HOOK(HOOK_CHIPSET_STARTUP, mp2964_on_startup,
+	     HOOK_PRIO_FIRST);
diff --git a/board/vell/usbc_config.c b/board/vell/usbc_config.c
new file mode 100644
index 0000000000..f653a93d1f
--- /dev/null
+++ b/board/vell/usbc_config.c
@@ -0,0 +1,512 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "cbi.h"
+#include "charger.h"
+#include "charge_ramp.h"
+#include "common.h"
+#include "compile_time_macros.h"
+#include "console.h"
+#include "driver/bc12/pi3usb9201_public.h"
+#include "driver/ppc/nx20p348x.h"
+#include "driver/ppc/syv682x_public.h"
+#include "driver/retimer/bb_retimer_public.h"
+#include "driver/tcpm/nct38xx.h"
+#include "driver/tcpm/ps8xxx_public.h"
+#include "driver/tcpm/tcpci.h"
+#include "ec_commands.h"
+#include "fw_config.h"
+#include "gpio.h"
+#include "gpio_signal.h"
+#include "hooks.h"
+#include "ioexpander.h"
+#include "system.h"
+#include "task.h"
+#include "task_id.h"
+#include "timer.h"
+#include "usbc_config.h"
+#include "usbc_ppc.h"
+#include "usb_charge.h"
+#include "usb_mux.h"
+#include "usb_pd.h"
+#include "usb_pd_tcpm.h"
+
+#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
+#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
+
+/* USBC TCPC configuration */
+const struct tcpc_config_t tcpc_config[] = {
+	[USBC_PORT_C0] = {
+		.bus_type = EC_BUS_TYPE_I2C,
+		.i2c_info = {
+			.port = I2C_PORT_USB_C0_C2_TCPC,
+			.addr_flags = NCT38XX_I2C_ADDR1_1_FLAGS,
+		},
+		.drv = &nct38xx_tcpm_drv,
+		.flags = TCPC_FLAGS_TCPCI_REV2_0 |
+			TCPC_FLAGS_NO_DEBUG_ACC_CONTROL,
+	},
+	[USBC_PORT_C1] = {
+		.bus_type = EC_BUS_TYPE_I2C,
+		.i2c_info = {
+			.port = I2C_PORT_USB_C1_TCPC,
+			.addr_flags = PS8751_I2C_ADDR1_FLAGS,
+		},
+		.drv = &ps8xxx_tcpm_drv,
+		.flags = TCPC_FLAGS_TCPCI_REV2_0 |
+			 TCPC_FLAGS_TCPCI_REV2_0_NO_VSAFE0V |
+			 TCPC_FLAGS_CONTROL_VCONN,
+	},
+	[USBC_PORT_C2] = {
+		.bus_type = EC_BUS_TYPE_I2C,
+		.i2c_info = {
+			.port = I2C_PORT_USB_C0_C2_TCPC,
+			.addr_flags = NCT38XX_I2C_ADDR2_1_FLAGS,
+		},
+		.drv = &nct38xx_tcpm_drv,
+		.flags = TCPC_FLAGS_TCPCI_REV2_0,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(tcpc_config) == USBC_PORT_COUNT);
+BUILD_ASSERT(CONFIG_USB_PD_PORT_MAX_COUNT == USBC_PORT_COUNT);
+
+/******************************************************************************/
+/* USB-A charging control */
+
+const int usb_port_enable[USB_PORT_COUNT] = {
+	GPIO_EN_PP5000_USBA_R,
+};
+BUILD_ASSERT(ARRAY_SIZE(usb_port_enable) == USB_PORT_COUNT);
+
+/******************************************************************************/
+
+/* USBC PPC configuration */
+struct ppc_config_t ppc_chips[] = {
+	[USBC_PORT_C0] = {
+		.i2c_port = I2C_PORT_USB_C0_C2_PPC,
+		.i2c_addr_flags = SYV682X_ADDR0_FLAGS,
+		.drv = &syv682x_drv,
+	},
+	[USBC_PORT_C1] = {
+		/* Compatible with Silicon Mitus SM536A0 */
+		.i2c_port = I2C_PORT_USB_C1_PPC,
+		.i2c_addr_flags = NX20P3483_ADDR2_FLAGS,
+		.drv = &nx20p348x_drv,
+	},
+	[USBC_PORT_C2] = {
+		.i2c_port = I2C_PORT_USB_C0_C2_PPC,
+		/*
+		 * b/179987870
+		 * schematics I2C map says ADDR3
+		 */
+		.i2c_addr_flags = SYV682X_ADDR2_FLAGS,
+		.drv = &syv682x_drv,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(ppc_chips) == USBC_PORT_COUNT);
+
+unsigned int ppc_cnt = ARRAY_SIZE(ppc_chips);
+
+/* USBC mux configuration - Alder Lake includes internal mux */
+static const struct usb_mux usbc0_tcss_usb_mux = {
+	.usb_port = USBC_PORT_C0,
+	.driver = &virtual_usb_mux_driver,
+	.hpd_update = &virtual_hpd_update,
+};
+static const struct usb_mux usbc2_tcss_usb_mux = {
+	.usb_port = USBC_PORT_C2,
+	.driver = &virtual_usb_mux_driver,
+	.hpd_update = &virtual_hpd_update,
+};
+
+/*
+ * USB3 DB mux configuration - the top level mux still needs to be set
+ * to the virtual_usb_mux_driver so the AP gets notified of mux changes
+ * and updates the TCSS configuration on state changes.
+ */
+static const struct usb_mux usbc1_usb3_db_retimer = {
+	.usb_port = USBC_PORT_C1,
+	.driver = &tcpci_tcpm_usb_mux_driver,
+	.hpd_update = &ps8xxx_tcpc_update_hpd_status,
+};
+
+const struct usb_mux usb_muxes[] = {
+	[USBC_PORT_C0] = {
+		.usb_port = USBC_PORT_C0,
+		.driver = &bb_usb_retimer,
+		.hpd_update = bb_retimer_hpd_update,
+		.i2c_port = I2C_PORT_USB_C0_C2_MUX,
+		.i2c_addr_flags = USBC_PORT_C0_BB_RETIMER_I2C_ADDR,
+		.next_mux = &usbc0_tcss_usb_mux,
+	},
+	[USBC_PORT_C1] = {
+		/* PS8815 DB */
+		.usb_port = USBC_PORT_C1,
+		.driver = &virtual_usb_mux_driver,
+		.hpd_update = &virtual_hpd_update,
+		.next_mux = &usbc1_usb3_db_retimer,
+	},
+	[USBC_PORT_C2] = {
+		.usb_port = USBC_PORT_C2,
+		.driver = &bb_usb_retimer,
+		.hpd_update = bb_retimer_hpd_update,
+		.i2c_port = I2C_PORT_USB_C0_C2_MUX,
+		.i2c_addr_flags = USBC_PORT_C2_BB_RETIMER_I2C_ADDR,
+		.next_mux = &usbc2_tcss_usb_mux,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(usb_muxes) == USBC_PORT_COUNT);
+
+/* BC1.2 charger detect configuration */
+const struct pi3usb9201_config_t pi3usb9201_bc12_chips[] = {
+	[USBC_PORT_C0] = {
+		.i2c_port = I2C_PORT_USB_C0_C2_BC12,
+		.i2c_addr_flags = PI3USB9201_I2C_ADDR_3_FLAGS,
+	},
+	[USBC_PORT_C1] = {
+		.i2c_port = I2C_PORT_USB_C1_BC12,
+		.i2c_addr_flags = PI3USB9201_I2C_ADDR_3_FLAGS,
+	},
+	[USBC_PORT_C2] = {
+		.i2c_port = I2C_PORT_USB_C0_C2_BC12,
+		.i2c_addr_flags = PI3USB9201_I2C_ADDR_1_FLAGS,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(pi3usb9201_bc12_chips) == USBC_PORT_COUNT);
+
+/*
+ * USB C0 and C2 uses burnside bridge chips and have their reset
+ * controlled by their respective TCPC chips acting as GPIO expanders.
+ *
+ * ioex_init() is normally called before we take the TCPCs out of
+ * reset, so we need to start in disabled mode, then explicitly
+ * call ioex_init().
+ */
+
+struct ioexpander_config_t ioex_config[] = {
+	[IOEX_C0_NCT38XX] = {
+		.i2c_host_port = I2C_PORT_USB_C0_C2_TCPC,
+		.i2c_addr_flags = NCT38XX_I2C_ADDR1_1_FLAGS,
+		.drv = &nct38xx_ioexpander_drv,
+		.flags = IOEX_FLAGS_DEFAULT_INIT_DISABLED,
+	},
+	[IOEX_C2_NCT38XX] = {
+		.i2c_host_port = I2C_PORT_USB_C0_C2_TCPC,
+		.i2c_addr_flags = NCT38XX_I2C_ADDR2_1_FLAGS,
+		.drv = &nct38xx_ioexpander_drv,
+		.flags = IOEX_FLAGS_DEFAULT_INIT_DISABLED,
+	},
+	[IOEX_ID_1_C0_NCT38XX] = {
+		.i2c_host_port = I2C_PORT_USB_C0_C2_TCPC,
+		.i2c_addr_flags = NCT38XX_I2C_ADDR1_1_FLAGS,
+		.drv = &nct38xx_ioexpander_drv,
+		.flags = IOEX_FLAGS_DEFAULT_INIT_DISABLED,
+	},
+	[IOEX_ID_1_C2_NCT38XX] = {
+		.i2c_host_port = I2C_PORT_USB_C0_C2_TCPC,
+		.i2c_addr_flags = NCT38XX_I2C_ADDR2_1_FLAGS,
+		.drv = &nct38xx_ioexpander_drv,
+		.flags = IOEX_FLAGS_DEFAULT_INIT_DISABLED,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(ioex_config) == CONFIG_IO_EXPANDER_PORT_COUNT);
+
+#ifdef CONFIG_CHARGE_RAMP_SW
+
+/*
+ * TODO(b/181508008): tune this threshold
+ */
+
+#define BC12_MIN_VOLTAGE 4400
+
+/**
+ * Return true if VBUS is too low
+ */
+int board_is_vbus_too_low(int port, enum chg_ramp_vbus_state ramp_state)
+{
+	int voltage;
+
+	if (charger_get_vbus_voltage(port, &voltage))
+		voltage = 0;
+
+	if (voltage == 0) {
+		CPRINTS("%s: must be disconnected", __func__);
+		return 1;
+	}
+
+	if (voltage < BC12_MIN_VOLTAGE) {
+		CPRINTS("%s: port %d: vbus %d lower than %d", __func__,
+			port, voltage, BC12_MIN_VOLTAGE);
+		return 1;
+	}
+
+	return 0;
+}
+
+#endif /* CONFIG_CHARGE_RAMP_SW */
+
+void config_usb_db_type(void)
+{
+	enum ec_cfg_usb_db_type db_type = ec_cfg_usb_db_type();
+
+	/*
+	 * TODO(b/180434685): implement multiple DB types
+	 */
+
+	CPRINTS("Configured USB DB type number is %d", db_type);
+}
+
+__override int bb_retimer_power_enable(const struct usb_mux *me, bool enable)
+{
+	enum ioex_signal rst_signal;
+
+	if (me->usb_port == USBC_PORT_C0) {
+		if (get_board_id() == 1)
+			rst_signal = IOEX_ID_1_USB_C0_RT_RST_ODL;
+		else
+			rst_signal = IOEX_USB_C0_RT_RST_ODL;
+	} else if (me->usb_port == USBC_PORT_C2) {
+		if (get_board_id() == 1)
+			rst_signal = IOEX_ID_1_USB_C2_RT_RST_ODL;
+		else
+			rst_signal = IOEX_USB_C2_RT_RST_ODL;
+	} else {
+		return EC_ERROR_INVAL;
+	}
+
+	/*
+	 * We do not have a load switch for the burnside bridge chips,
+	 * so we only need to sequence reset.
+	 */
+
+	if (enable) {
+		/*
+		 * Tpw, minimum time from VCC to RESET_N de-assertion is 100us.
+		 * For boards that don't provide a load switch control, the
+		 * retimer_init() function ensures power is up before calling
+		 * this function.
+		 */
+		ioex_set_level(rst_signal, 1);
+		/*
+		 * Allow 1ms time for the retimer to power up lc_domain
+		 * which powers I2C controller within retimer
+		 */
+		msleep(1);
+		if (get_board_id() == 1) {
+			int val;
+
+			/*
+			 * Check if we were able to deassert
+			 * reset. Board ID 1 uses a GPIO that is
+			 * uncontrollable when a debug accessory is
+			 * connected.
+			 */
+			if (ioex_get_level(rst_signal, &val) != EC_SUCCESS)
+				return EC_ERROR_UNKNOWN;
+			if (val != 1)
+				return EC_ERROR_NOT_POWERED;
+		}
+	} else {
+		ioex_set_level(rst_signal, 0);
+		msleep(1);
+	}
+	return EC_SUCCESS;
+}
+
+void board_reset_pd_mcu(void)
+{
+	enum gpio_signal tcpc_rst;
+
+	if (get_board_id() == 1)
+		tcpc_rst = GPIO_ID_1_USB_C0_C2_TCPC_RST_ODL;
+	else
+		tcpc_rst = GPIO_USB_C0_C2_TCPC_RST_ODL;
+
+	/*
+	 * TODO(b/179648104): figure out correct timing
+	 */
+
+	gpio_set_level(tcpc_rst, 0);
+	if (ec_cfg_usb_db_type() != DB_USB_ABSENT) {
+		gpio_set_level(GPIO_USB_C1_RST_ODL, 0);
+		gpio_set_level(GPIO_USB_C1_RT_RST_R_ODL, 0);
+	}
+
+	/*
+	 * delay for power-on to reset-off and min. assertion time
+	 */
+
+	msleep(20);
+
+	gpio_set_level(tcpc_rst, 1);
+	if (ec_cfg_usb_db_type() != DB_USB_ABSENT) {
+		gpio_set_level(GPIO_USB_C1_RST_ODL, 1);
+		gpio_set_level(GPIO_USB_C1_RT_RST_R_ODL, 1);
+	}
+
+	/* wait for chips to come up */
+
+	msleep(50);
+}
+
+static void enable_ioex(int ioex)
+{
+	ioex_init(ioex);
+}
+
+static void board_tcpc_init(void)
+{
+	/* Don't reset TCPCs after initial reset */
+	if (!system_jumped_late()) {
+		board_reset_pd_mcu();
+
+		/*
+		 * These IO expander pins are implemented using the
+		 * C0/C2 TCPC, so they must be set up after the TCPC has
+		 * been taken out of reset.
+		 */
+		if (get_board_id() == 1) {
+			enable_ioex(IOEX_ID_1_C0_NCT38XX);
+			enable_ioex(IOEX_ID_1_C2_NCT38XX);
+		} else {
+			enable_ioex(IOEX_C0_NCT38XX);
+			enable_ioex(IOEX_C2_NCT38XX);
+		}
+	}
+
+	/* Enable PPC interrupts. */
+	gpio_enable_interrupt(GPIO_USB_C0_PPC_INT_ODL);
+	gpio_enable_interrupt(GPIO_USB_C2_PPC_INT_ODL);
+
+	/* Enable TCPC interrupts. */
+	gpio_enable_interrupt(GPIO_USB_C0_C2_TCPC_INT_ODL);
+
+	/* Enable BC1.2 interrupts. */
+	gpio_enable_interrupt(GPIO_USB_C0_BC12_INT_ODL);
+	gpio_enable_interrupt(GPIO_USB_C2_BC12_INT_ODL);
+
+	if (ec_cfg_usb_db_type() != DB_USB_ABSENT) {
+		gpio_enable_interrupt(GPIO_USB_C1_PPC_INT_ODL);
+		gpio_enable_interrupt(GPIO_USB_C1_TCPC_INT_ODL);
+		gpio_enable_interrupt(GPIO_USB_C1_BC12_INT_ODL);
+	}
+}
+DECLARE_HOOK(HOOK_INIT, board_tcpc_init, HOOK_PRIO_INIT_CHIPSET);
+
+uint16_t tcpc_get_alert_status(void)
+{
+	uint16_t status = 0;
+
+	if (gpio_get_level(GPIO_USB_C0_C2_TCPC_INT_ODL) == 0)
+		status |= PD_STATUS_TCPC_ALERT_0 | PD_STATUS_TCPC_ALERT_2;
+
+	if ((ec_cfg_usb_db_type() != DB_USB_ABSENT) &&
+	    gpio_get_level(GPIO_USB_C1_TCPC_INT_ODL) == 0)
+		status |= PD_STATUS_TCPC_ALERT_1;
+
+	return status;
+}
+
+int ppc_get_alert_status(int port)
+{
+	if (port == USBC_PORT_C0)
+		return gpio_get_level(GPIO_USB_C0_PPC_INT_ODL) == 0;
+	else if ((port == USBC_PORT_C1) &&
+		 (ec_cfg_usb_db_type() != DB_USB_ABSENT))
+		return gpio_get_level(GPIO_USB_C1_PPC_INT_ODL) == 0;
+	else if (port == USBC_PORT_C2)
+		return gpio_get_level(GPIO_USB_C2_PPC_INT_ODL) == 0;
+	return 0;
+}
+
+void tcpc_alert_event(enum gpio_signal signal)
+{
+	switch (signal) {
+	case GPIO_USB_C0_C2_TCPC_INT_ODL:
+		schedule_deferred_pd_interrupt(USBC_PORT_C0);
+		break;
+	case GPIO_USB_C1_TCPC_INT_ODL:
+		if (ec_cfg_usb_db_type() == DB_USB_ABSENT)
+			break;
+		schedule_deferred_pd_interrupt(USBC_PORT_C1);
+		break;
+	default:
+		break;
+	}
+}
+
+void bc12_interrupt(enum gpio_signal signal)
+{
+	switch (signal) {
+	case GPIO_USB_C0_BC12_INT_ODL:
+		task_set_event(TASK_ID_USB_CHG_P0, USB_CHG_EVENT_BC12);
+		break;
+	case GPIO_USB_C1_BC12_INT_ODL:
+		if (ec_cfg_usb_db_type() == DB_USB_ABSENT)
+			break;
+		task_set_event(TASK_ID_USB_CHG_P1, USB_CHG_EVENT_BC12);
+		break;
+	case GPIO_USB_C2_BC12_INT_ODL:
+		task_set_event(TASK_ID_USB_CHG_P2, USB_CHG_EVENT_BC12);
+		break;
+	default:
+		break;
+	}
+}
+
+void ppc_interrupt(enum gpio_signal signal)
+{
+	switch (signal) {
+	case GPIO_USB_C0_PPC_INT_ODL:
+		syv682x_interrupt(USBC_PORT_C0);
+		break;
+	case GPIO_USB_C1_PPC_INT_ODL:
+		switch (ec_cfg_usb_db_type()) {
+		case DB_USB_ABSENT:
+		case DB_USB_ABSENT2:
+			break;
+		case DB_USB3_PS8815:
+			nx20p348x_interrupt(USBC_PORT_C1);
+			break;
+		}
+		break;
+	case GPIO_USB_C2_PPC_INT_ODL:
+		syv682x_interrupt(USBC_PORT_C2);
+		break;
+	default:
+		break;
+	}
+}
+
+void retimer_interrupt(enum gpio_signal signal)
+{
+	/*
+	 * TODO(b/179513527): add USB-C support
+	 */
+}
+
+__override bool board_is_dts_port(int port)
+{
+	return port == USBC_PORT_C0;
+}
+
+__override bool board_is_tbt_usb4_port(int port)
+{
+	if (port == USBC_PORT_C0 || port == USBC_PORT_C2)
+		return true;
+
+	return false;
+}
+
+__override enum tbt_compat_cable_speed board_get_max_tbt_speed(int port)
+{
+	if (!board_is_tbt_usb4_port(port))
+		return TBT_SS_RES_0;
+
+	return TBT_SS_TBT_GEN3;
+}
diff --git a/board/vell/usbc_config.h b/board/vell/usbc_config.h
new file mode 100644
index 0000000000..5d08a446fb
--- /dev/null
+++ b/board/vell/usbc_config.h
@@ -0,0 +1,22 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Brya board-specific USB-C configuration */
+
+#ifndef __CROS_EC_USBC_CONFIG_H
+#define __CROS_EC_USBC_CONFIG_H
+
+#define CONFIG_USB_PD_PORT_MAX_COUNT	3
+
+enum usbc_port {
+	USBC_PORT_C0 = 0,
+	USBC_PORT_C1,
+	USBC_PORT_C2,
+	USBC_PORT_COUNT
+};
+
+void config_usb_db_type(void);
+
+#endif /* __CROS_EC_USBC_CONFIG_H */
diff --git a/board/vell/vif_override.xml b/board/vell/vif_override.xml
new file mode 100644
index 0000000000..32736caf64
--- /dev/null
+++ b/board/vell/vif_override.xml
@@ -0,0 +1,3 @@
+<!-- Add VIF field overrides here. See genvif.c and the Vendor Info File
+     Definition from the USB-IF.
+-->