krabby: initial EC

Start from copying Asurada board.
Modified baseboard name in krabby/build.mk and copyright header.

Will cleanup in following CLs.

BUG=b:202808130
TEST=make BOARD=krabby
BRANCH=main

Signed-off-by: Ting Shen <phoenixshen@google.com>
Change-Id: I200c8dec7714dfacc38aad1edbf236c1a6268e0e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3218585
Reviewed-by: Eric Yilun Lin <yllin@google.com>
Commit-Queue: Ting Shen <phoenixshen@chromium.org>
Tested-by: Ting Shen <phoenixshen@chromium.org>

21 files changed, 2286 insertions, 0 deletions

diff --git a/baseboard/corsola/baseboard.c b/baseboard/corsola/baseboard.c
new file mode 100644
index 0000000000..c89348a562
--- /dev/null
+++ b/baseboard/corsola/baseboard.c
@@ -0,0 +1,101 @@
+/* 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.
+ */
+
+/* Asurada baseboard-specific configuration */
+
+#include "adc.h"
+#include "button.h"
+#include "charge_manager.h"
+#include "charger.h"
+#include "charger.h"
+#include "charge_state.h"
+#include "charge_state_v2.h"
+#include "chipset.h"
+#include "common.h"
+#include "console.h"
+#include "driver/accelgyro_bmi_common.h"
+#include "driver/accel_lis2dw12.h"
+#include "driver/als_tcs3400.h"
+#include "driver/bc12/mt6360.h"
+#include "driver/charger/isl923x.h"
+#include "driver/ppc/syv682x.h"
+#include "driver/tcpm/it83xx_pd.h"
+#include "driver/temp_sensor/thermistor.h"
+#include "extpower.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "i2c.h"
+#include "it5205_sbu.h"
+#include "keyboard_scan.h"
+#include "lid_switch.h"
+#include "motion_sense.h"
+#include "power_button.h"
+#include "power.h"
+#include "regulator.h"
+#include "spi.h"
+#include "switch.h"
+#include "tablet_mode.h"
+#include "task.h"
+#include "temp_sensor.h"
+#include "timer.h"
+#include "uart.h"
+
+#include "gpio_list.h"
+
+/* Wake-up pins for hibernate */
+enum gpio_signal hibernate_wake_pins[] = {
+	GPIO_AC_PRESENT,
+	GPIO_LID_OPEN,
+	GPIO_POWER_BUTTON_L,
+};
+int hibernate_wake_pins_used = ARRAY_SIZE(hibernate_wake_pins);
+
+/*
+ * I2C channels (A, B, and C) are using the same timing registers (00h~07h)
+ * at default.
+ * In order to set frequency independently for each channels,
+ * We use timing registers 09h~0Bh, and the supported frequency will be:
+ * 50KHz, 100KHz, 400KHz, or 1MHz.
+ * I2C channels (D, E and F) can be set different frequency on different ports.
+ * The I2C(D/E/F) frequency depend on the frequency of SMBus Module and
+ * the individual prescale register.
+ * The frequency of SMBus module is 24MHz on default.
+ * The allowed range of I2C(D/E/F) frequency is as following setting.
+ * SMBus Module Freq = PLL_CLOCK / ((IT83XX_ECPM_SCDCR2 & 0x0F) + 1)
+ * (SMBus Module Freq / 510) <=  I2C Freq <= (SMBus Module Freq / 8)
+ * Channel D has multi-function and can be used as UART interface.
+ * Channel F is reserved for EC debug.
+ */
+
+/* I2C ports */
+const struct i2c_port_t i2c_ports[] = {
+	{"bat_chg",  IT83XX_I2C_CH_A, 100, GPIO_I2C_A_SCL, GPIO_I2C_A_SDA},
+	{"sensor",   IT83XX_I2C_CH_B, 400, GPIO_I2C_B_SCL, GPIO_I2C_B_SDA},
+	{"usb0",     IT83XX_I2C_CH_C, 400, GPIO_I2C_C_SCL, GPIO_I2C_C_SDA},
+	{"usb1",     IT83XX_I2C_CH_E, 400, GPIO_I2C_E_SCL, GPIO_I2C_E_SDA},
+};
+const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
+
+int board_allow_i2c_passthru(int port)
+{
+	return (port == I2C_PORT_VIRTUAL_BATTERY);
+}
+
+const struct cc_para_t *board_get_cc_tuning_parameter(enum usbpd_port port)
+{
+	const static struct cc_para_t
+		cc_parameter[CONFIG_USB_PD_ITE_ACTIVE_PORT_COUNT] = {
+		{
+			.rising_time = IT83XX_TX_PRE_DRIVING_TIME_1_UNIT,
+			.falling_time = IT83XX_TX_PRE_DRIVING_TIME_2_UNIT,
+		},
+		{
+			.rising_time = IT83XX_TX_PRE_DRIVING_TIME_1_UNIT,
+			.falling_time = IT83XX_TX_PRE_DRIVING_TIME_2_UNIT,
+		},
+	};
+
+	return &cc_parameter[port];
+}
diff --git a/baseboard/corsola/baseboard.h b/baseboard/corsola/baseboard.h
new file mode 100644
index 0000000000..f3c0808660
--- /dev/null
+++ b/baseboard/corsola/baseboard.h
@@ -0,0 +1,196 @@
+/* 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.
+ */
+
+/* Asurada board configuration */
+
+#ifndef __CROS_EC_BASEBOARD_H
+#define __CROS_EC_BASEBOARD_H
+
+/* IT81202-bx config */
+/*
+ * NOTE: we need to make correct VCC voltage selection here if EC's VCC isn't
+ * connect to 1.8v on other versions.
+ */
+#define CONFIG_IT83XX_VCC_1P8V
+
+/*
+ * On power-on, H1 releases the EC from reset but then quickly asserts and
+ * releases the reset a second time. This means the EC sees 2 resets:
+ * (1) power-on reset, (2) reset-pin reset. This config will
+ * allow the second reset to be treated as a power-on.
+ */
+#define CONFIG_BOARD_RESET_AFTER_POWER_ON
+#define CONFIG_CHIPSET_MT8192
+#define CONFIG_EXTPOWER_GPIO
+#define CONFIG_HIBERNATE_WAKE_PINS_DYNAMIC
+#define CONFIG_POWER_SLEEP_FAILURE_DETECTION
+#define CONFIG_POWER_TRACK_HOST_SLEEP_STATE
+
+/* Chipset */
+#define CONFIG_CMD_AP_RESET_LOG
+#define CONFIG_CMD_POWERINDEBUG
+#define CONFIG_HOST_COMMAND_STATUS
+#define CONFIG_LOW_POWER_IDLE
+#define CONFIG_LOW_POWER_S0
+#define CONFIG_POWER_BUTTON
+#define CONFIG_POWER_COMMON
+#define CONFIG_PWM
+#define CONFIG_VBOOT_HASH
+#define CONFIG_VOLUME_BUTTONS
+#define CONFIG_WP_ACTIVE_HIGH
+
+/* Battery */
+#define CONFIG_BATTERY_CUT_OFF
+#define CONFIG_BATTERY_FUEL_GAUGE
+#define CONFIG_BATTERY_PRESENT_GPIO GPIO_EC_BATT_PRES_ODL
+#define CONFIG_BATTERY_SMART
+
+/* BC12 */
+#define CONFIG_BC12_DETECT_MT6360
+#define CONFIG_BC12_DETECT_PI3USB9201
+#undef CONFIG_BC12_SINGLE_DRIVER
+#define CONFIG_USB_CHARGER
+
+/* Charger */
+#define ADC_AMON_BMON ADC_CHARGER_AMON_R /* ADC name remap */
+#define ADC_PSYS ADC_CHARGER_PMON /* ADC name remap */
+#define CONFIG_CHARGE_MANAGER
+#define CONFIG_CHARGER
+#define CONFIG_CHARGE_RAMP_HW
+#define CONFIG_CHARGER_DISCHARGE_ON_AC
+#define CONFIG_CHARGER_INPUT_CURRENT 512
+#define CONFIG_CHARGER_ISL9238C
+#define CONFIG_CHARGER_MAINTAIN_VBAT
+#define CONFIG_CHARGER_OTG
+#define CONFIG_CHARGER_PSYS
+#define CONFIG_CHARGER_PSYS_READ
+#define CONFIG_CHARGER_SENSE_RESISTOR 10 /* BOARD_RS2 */
+#define CONFIG_CHARGER_SENSE_RESISTOR_AC 20 /* BOARD_RS1 */
+#define CONFIG_CMD_CHARGER_ADC_AMON_BMON
+
+/* Keyboard */
+#define CONFIG_CMD_KEYBOARD
+#define CONFIG_KEYBOARD_COL2_INVERTED
+#define CONFIG_KEYBOARD_PROTOCOL_MKBP
+#define CONFIG_MKBP_USE_GPIO
+
+/* I2C */
+#define CONFIG_I2C
+#define CONFIG_I2C_CONTROLLER
+#define CONFIG_I2C_PASSTHRU_RESTRICTED
+#define CONFIG_I2C_VIRTUAL_BATTERY
+#define I2C_PORT_CHARGER IT83XX_I2C_CH_A
+#define I2C_PORT_BATTERY IT83XX_I2C_CH_A
+#define I2C_PORT_POWER   IT83XX_I2C_CH_A
+#define I2C_PORT_ACCEL IT83XX_I2C_CH_B
+#define I2C_PORT_PPC0  IT83XX_I2C_CH_C
+#define I2C_PORT_PPC1  IT83XX_I2C_CH_E
+#define I2C_PORT_USB_MUX0 IT83XX_I2C_CH_C
+#define I2C_PORT_USB_MUX1 IT83XX_I2C_CH_E
+#define I2C_PORT_VIRTUAL_BATTERY I2C_PORT_BATTERY
+#define CONFIG_SMBUS_PEC
+
+/* LED */
+#define CONFIG_LED_COMMON
+
+/* PD / USB-C / PPC */
+#define CONFIG_CMD_PPC_DUMP
+#define CONFIG_HOSTCMD_PD_CONTROL
+#define CONFIG_IT83XX_TUNE_CC_PHY
+#define CONFIG_USB_MUX_VIRTUAL
+#define CONFIG_USBC_PPC
+#define CONFIG_USBC_PPC_DEDICATED_INT
+#define CONFIG_USBC_PPC_POLARITY
+#define CONFIG_USBC_PPC_SYV682C
+#define CONFIG_USBC_PPC_VCONN
+#define CONFIG_USBC_SS_MUX
+#define CONFIG_USBC_VCONN
+#define CONFIG_USBC_VCONN_SWAP
+#define CONFIG_USB_DRP_ACC_TRYSRC
+#define CONFIG_USB_MUX_IT5205 /* C0 */
+#define CONFIG_USB_MUX_PS8743 /* C1 */
+#define CONFIG_USB_PD_ALT_MODE
+#define CONFIG_USB_PD_ALT_MODE_DFP
+#define CONFIG_USB_PD_DECODE_SOP
+#define CONFIG_USB_PD_DISCHARGE
+#define CONFIG_USB_PD_DISCHARGE_PPC
+#define CONFIG_USB_PD_DP_HPD_GPIO
+#define CONFIG_USB_PD_DP_HPD_GPIO_CUSTOM
+#define CONFIG_USB_PD_DUAL_ROLE
+#define CONFIG_USB_PD_FRS_PPC
+#define CONFIG_USB_PD_ITE_ACTIVE_PORT_COUNT 2
+#define CONFIG_USB_PD_LOGGING
+#define CONFIG_USB_PD_PORT_MAX_COUNT 2
+#define CONFIG_USB_PD_REV30
+#define CONFIG_USB_PD_TCPC_LOW_POWER
+#define CONFIG_USB_PD_TCPM_ITE_ON_CHIP
+#define CONFIG_USB_PD_TCPM_TCPCI
+#define CONFIG_USB_PD_TCPMV2
+#define CONFIG_USB_PD_TRY_SRC
+#define CONFIG_USB_PD_VBUS_DETECT_PPC
+#define CONFIG_USB_PD_VBUS_MEASURE_ADC_EACH_PORT
+#define CONFIG_USB_PID 0x5053
+#define CONFIG_USB_POWER_DELIVERY
+
+/* USB-A */
+#define CONFIG_USB_PORT_POWER_DUMB
+#define CONFIG_USB_PORT_POWER_DUMB_CUSTOM_HOOK
+#define USB_PORT_COUNT USBA_PORT_COUNT
+
+/* UART */
+#undef CONFIG_UART_TX_BUF_SIZE
+#define CONFIG_UART_TX_BUF_SIZE 4096
+
+/* Sensor */
+#ifdef HAS_TASK_MOTIONSENSE
+#define CONFIG_CMD_ACCEL_INFO
+#define CONFIG_CMD_ACCELS
+
+#define CONFIG_ACCEL_FIFO
+#define CONFIG_ACCEL_FIFO_SIZE 256
+#define CONFIG_ACCEL_FIFO_THRES (CONFIG_ACCEL_FIFO_SIZE / 3)
+#define CONFIG_ACCEL_INTERRUPTS
+#endif
+
+/* SPI / Host Command */
+#define CONFIG_SPI
+
+/* MKBP */
+#define CONFIG_MKBP_EVENT
+
+#define CONFIG_KEYBOARD_PROTOCOL_MKBP
+#define CONFIG_MKBP_USE_GPIO
+
+/* Voltage regulator control */
+#define CONFIG_HOSTCMD_REGULATOR
+
+/* Define the host events which are allowed to wakeup AP in S3. */
+#define CONFIG_MKBP_HOST_EVENT_WAKEUP_MASK                   \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_CONNECTED) |    \
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED) | \
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN) |        \
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_HANG_DETECT) |     \
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_MODE_CHANGE) | \
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_POWER_BUTTON))
+
+/* And the MKBP events */
+#define CONFIG_MKBP_EVENT_WAKEUP_MASK \
+		(BIT(EC_MKBP_EVENT_KEY_MATRIX) | \
+		 BIT(EC_MKBP_EVENT_HOST_EVENT))
+
+#include "baseboard_common.h"
+
+#ifndef __ASSEMBLER__
+
+#include "gpio_signal.h"
+#include "registers.h"
+#include "power/mt8192.h"
+
+void board_reset_pd_mcu(void);
+enum board_sub_board board_get_sub_board(void);
+void usb_a0_interrupt(enum gpio_signal signal);
+
+#endif /* !__ASSEMBLER__ */
+#endif /* __CROS_EC_BASEBOARD_H */
diff --git a/baseboard/corsola/baseboard_common.h b/baseboard/corsola/baseboard_common.h
new file mode 100644
index 0000000000..0245ae42bf
--- /dev/null
+++ b/baseboard/corsola/baseboard_common.h
@@ -0,0 +1,44 @@
+/* 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.
+ */
+
+/* Asurada baseboard-specific onfiguration common to ECOS and Zephyr */
+
+#ifndef __CROS_EC_BASEBOARD_COMMON_H
+#define __CROS_EC_BASEBOARD_COMMON_H
+
+/* GPIO name remapping */
+#define GPIO_EN_HDMI_PWR        GPIO_EC_X_GPIO1
+#define GPIO_USB_C1_FRS_EN      GPIO_EC_X_GPIO1
+#define GPIO_USB_C1_PPC_INT_ODL GPIO_X_EC_GPIO2
+#define GPIO_PS185_EC_DP_HPD    GPIO_X_EC_GPIO2
+#define GPIO_USB_C1_DP_IN_HPD   GPIO_EC_X_GPIO3
+#define GPIO_PS185_PWRDN_ODL    GPIO_EC_X_GPIO3
+
+#ifndef __ASSEMBLER__
+
+#include "gpio_signal.h"
+
+enum board_sub_board {
+	SUB_BOARD_NONE = -1,
+	SUB_BOARD_TYPEC,
+	SUB_BOARD_HDMI,
+	SUB_BOARD_COUNT,
+};
+
+/**
+ * board_get_version() - Get the board version
+ *
+ * Read the ADC to obtain the board version
+ *
+ * @return board version in the range 0 to 14 inclusive
+ */
+int board_get_version(void);
+
+void ppc_interrupt(enum gpio_signal signal);
+void bc12_interrupt(enum gpio_signal signal);
+void x_ec_interrupt(enum gpio_signal signal);
+
+#endif /* !__ASSEMBLER__ */
+#endif /* __CROS_EC_BASEBOARD_COMMON_H */
diff --git a/baseboard/corsola/board_chipset.c b/baseboard/corsola/board_chipset.c
new file mode 100644
index 0000000000..4d12fb0334
--- /dev/null
+++ b/baseboard/corsola/board_chipset.c
@@ -0,0 +1,24 @@
+/* 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.
+ */
+
+/* Asurada baseboard-chipset specific configuration */
+
+#include "common.h"
+#include "gpio.h"
+#include "hooks.h"
+
+/* Called on AP S3 -> S0 transition */
+static void board_chipset_resume(void)
+{
+	gpio_set_level(GPIO_EC_BL_EN_OD, 1);
+}
+DECLARE_HOOK(HOOK_CHIPSET_RESUME, board_chipset_resume, HOOK_PRIO_DEFAULT);
+
+/* Called on AP S0 -> S3 transition */
+static void board_chipset_suspend(void)
+{
+	gpio_set_level(GPIO_EC_BL_EN_OD, 0);
+}
+DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);
diff --git a/baseboard/corsola/board_id.c b/baseboard/corsola/board_id.c
new file mode 100644
index 0000000000..c39cf050a8
--- /dev/null
+++ b/baseboard/corsola/board_id.c
@@ -0,0 +1,107 @@
+/* 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 "adc.h"
+#include "common.h"
+#include "console.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "timer.h"
+#include "util.h"
+
+/**
+ * Conversion based on following table:
+ *
+ * ID | Rp   | Rd   | Voltage
+ *    | kOhm | kOhm | mV
+ * ---+------+------+--------
+ *  0 | 51.1 |  2.2 | 136.2
+ *  1 | 51.1 | 6.81 | 388.1
+ *  2 | 51.1 |   11 | 584.5
+ *  3 | 57.6 |   18 | 785.7
+ *  4 | 51.1 |   22 | 993.2
+ *  5 | 51.1 |   30 | 1220.7
+ *  6 | 51.1 | 39.2 | 1432.6
+ *  7 |   56 |   56 | 1650.0
+ *  8 |   47 | 61.9 | 1875.8
+ *  9 |   47 | 80.6 | 2084.5
+ * 10 |   56 |  124 | 2273.3
+ * 11 | 51.1 |  150 | 2461.5
+ * 12 |   47 |  200 | 2672.1
+ * 13 |   47 |  330 | 2888.6
+ * 14 |   47 |  680 | 3086.7
+ */
+const static int voltage_map[] = {
+	136,
+	388,
+	584,
+	785,
+	993,
+	1220,
+	1432,
+	1650,
+	1875,
+	2084,
+	2273,
+	2461,
+	2672,
+	2888,
+	3086,
+};
+
+const int threshold_mv = 100;
+
+/**
+ * Convert ADC value to board id using the voltage table above.
+ *
+ * @param ch	ADC channel to read, usually ADC_BOARD_ID_0 or ADC_BOARD_ID_1.
+ *
+ * @return	a non-negative board id, or negative value if error.
+ */
+static int adc_value_to_numeric_id(enum adc_channel ch)
+{
+	int mv;
+
+	gpio_set_level(GPIO_EN_EC_ID_ODL, 0);
+	/* Wait to allow cap charge */
+	msleep(10);
+
+	mv = adc_read_channel(ch);
+	if (mv == ADC_READ_ERROR)
+		mv = adc_read_channel(ch);
+
+	gpio_set_level(GPIO_EN_EC_ID_ODL, 1);
+
+	if (mv == ADC_READ_ERROR)
+		return -EC_ERROR_UNKNOWN;
+
+	for (int i = 0; i < ARRAY_SIZE(voltage_map); i++) {
+		if (IN_RANGE(mv, voltage_map[i] - threshold_mv,
+			     voltage_map[i] + threshold_mv))
+			return i;
+	}
+
+	return -EC_ERROR_UNKNOWN;
+}
+
+static int version = -1;
+
+/* b/163963220: Cache ADC value before board_hibernate_late() reads it */
+static void board_version_init(void)
+{
+	version = adc_value_to_numeric_id(ADC_BOARD_ID_0);
+	if (version < 0) {
+		ccprints("WARN:BOARD_ID_0");
+		ccprints("Assuming board id = 0");
+
+		version = 0;
+	}
+}
+DECLARE_HOOK(HOOK_INIT, board_version_init, HOOK_PRIO_INIT_ADC + 1);
+
+__override int board_get_version(void)
+{
+	return version;
+}
diff --git a/baseboard/corsola/build.mk b/baseboard/corsola/build.mk
new file mode 100644
index 0000000000..ce7b7272bd
--- /dev/null
+++ b/baseboard/corsola/build.mk
@@ -0,0 +1,15 @@
+# -*- 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.
+#
+# Baseboard specific files build
+#
+
+baseboard-y=baseboard.o
+baseboard-y+=board_chipset.o
+baseboard-y+=board_id.o
+baseboard-y+=hibernate.o
+baseboard-y+=regulator.o
+baseboard-y+=usbc_config.o
+baseboard-$(CONFIG_USB_POWER_DELIVERY)+=usb_pd_policy.o
diff --git a/baseboard/corsola/hibernate.c b/baseboard/corsola/hibernate.c
new file mode 100644
index 0000000000..b26bd44adc
--- /dev/null
+++ b/baseboard/corsola/hibernate.c
@@ -0,0 +1,37 @@
+/* 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 "charger.h"
+#include "driver/charger/isl923x_public.h"
+#include "gpio.h"
+#include "system.h"
+
+/* Hayato board specific hibernate implementation */
+__override void board_hibernate_late(void)
+{
+	/*
+	 * Turn off PP5000_A. Required for devices without Z-state.
+	 * Don't care for devices with Z-state.
+	 */
+	gpio_set_level(GPIO_EN_PP5000_A, 0);
+
+	/*
+	 * GPIO_EN_SLP_Z not implemented in rev0/1,
+	 * fallback to usual hibernate process.
+	 */
+	if (board_get_version() <= 1) {
+		if (IS_ENABLED(BOARD_ASURADA) ||
+			(IS_ENABLED(CONFIG_ZEPHYR) &&
+			IS_ENABLED(CONFIG_BOARD_ASURADA)))
+			return;
+	}
+
+	isl9238c_hibernate(CHARGER_SOLO);
+
+	gpio_set_level(GPIO_EN_SLP_Z, 1);
+
+	/* should not reach here */
+	__builtin_unreachable();
+}
diff --git a/baseboard/corsola/it5205_sbu.c b/baseboard/corsola/it5205_sbu.c
new file mode 100644
index 0000000000..61a996fcbe
--- /dev/null
+++ b/baseboard/corsola/it5205_sbu.c
@@ -0,0 +1,68 @@
+/* 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.
+ *
+ * IT5205 Type-C SBU OVP handler
+ */
+
+#include "console.h"
+#include "hooks.h"
+#include "it5205.h"
+#include "stdbool.h"
+#include "timer.h"
+#include "usb_mux.h"
+
+#define CPRINTS(format, args...) cprints(CC_USB, format, ## args)
+#define CPRINTF(format, args...) cprintf(CC_USB, format, ## args)
+
+#define OVP_RETRY_DELAY_US_MIN (100 * MSEC)
+
+static unsigned int ovp_retry_delay_us = OVP_RETRY_DELAY_US_MIN;
+
+static void reset_retry_delay(void)
+{
+	CPRINTS("IT5205 SBU OVP cleared");
+	ovp_retry_delay_us = OVP_RETRY_DELAY_US_MIN;
+}
+DECLARE_DEFERRED(reset_retry_delay);
+
+static void reset_csbu(void)
+{
+	/* double the retry time up to 1 minute */
+	ovp_retry_delay_us = MIN(ovp_retry_delay_us * 2, MINUTE);
+	/* and reset it if interrupt not triggered in a short period */
+	hook_call_deferred(&reset_retry_delay_data, 500 * MSEC);
+
+	/* re-enable sbu interrupt */
+	it5205h_enable_csbu_switch(&usb_muxes[0], false);
+	it5205h_enable_csbu_switch(&usb_muxes[0], true);
+}
+DECLARE_DEFERRED(reset_csbu);
+
+static void it5205h_hook_ac_change(void)
+{
+	int reg;
+
+	/* Check if the board has IT5205H, and read its ovp status */
+	if (i2c_read8(I2C_PORT_USB_MUX0, IT5205H_SBU_I2C_ADDR_FLAGS,
+		      IT5205H_REG_ISR, &reg))
+		return;
+
+	/*
+	 * Re-poll ovp status immediately if AC detached, because ovp will
+	 * likely be recovered.
+	 *
+	 * Always perform the re-poll even when this hook is triggered by
+	 * unrelated events.
+	 */
+	if (reg & IT5205H_ISR_CSBU_OVP)
+		hook_call_deferred(&reset_csbu_data, 0);
+}
+DECLARE_HOOK(HOOK_AC_CHANGE, it5205h_hook_ac_change, HOOK_PRIO_DEFAULT);
+
+void it5205h_sbu_interrupt(enum gpio_signal signal)
+{
+	CPRINTS("IT5205 SBU OVP triggered");
+	hook_call_deferred(&reset_csbu_data, ovp_retry_delay_us);
+	hook_call_deferred(&reset_retry_delay_data, -1);
+}
diff --git a/baseboard/corsola/it5205_sbu.h b/baseboard/corsola/it5205_sbu.h
new file mode 100644
index 0000000000..43f226da3b
--- /dev/null
+++ b/baseboard/corsola/it5205_sbu.h
@@ -0,0 +1,13 @@
+/* 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.
+ *
+ * IT5205 Type-C SBU OVP handler
+ */
+
+#ifndef __CROS_EC_ASURADA_IT5205_SBU_H
+#define __CROS_EC_ASURADA_IT5205_SBU_H
+
+void it5205h_sbu_interrupt(enum gpio_signal signal);
+
+#endif /* __CROS_EC_ASURADA_IT5205_SBU_H */
diff --git a/baseboard/corsola/regulator.c b/baseboard/corsola/regulator.c
new file mode 100644
index 0000000000..35670bda82
--- /dev/null
+++ b/baseboard/corsola/regulator.c
@@ -0,0 +1,46 @@
+/* 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 "bc12/mt6360_public.h"
+
+/* SD Card */
+int board_regulator_get_info(uint32_t index, char *name,
+			     uint16_t *num_voltages, uint16_t *voltages_mv)
+{
+	enum mt6360_regulator_id id = index;
+
+	return mt6360_regulator_get_info(id, name, num_voltages,
+					 voltages_mv);
+}
+
+int board_regulator_enable(uint32_t index, uint8_t enable)
+{
+	enum mt6360_regulator_id id = index;
+
+	return mt6360_regulator_enable(id, enable);
+}
+
+int board_regulator_is_enabled(uint32_t index, uint8_t *enabled)
+{
+	enum mt6360_regulator_id id = index;
+
+	return mt6360_regulator_is_enabled(id, enabled);
+}
+
+int board_regulator_set_voltage(uint32_t index, uint32_t min_mv,
+				uint32_t max_mv)
+{
+	enum mt6360_regulator_id id = index;
+
+	return mt6360_regulator_set_voltage(id, min_mv, max_mv);
+}
+
+int board_regulator_get_voltage(uint32_t index, uint32_t *voltage_mv)
+{
+	enum mt6360_regulator_id id = index;
+
+	return mt6360_regulator_get_voltage(id, voltage_mv);
+}
diff --git a/baseboard/corsola/usb_pd_policy.c b/baseboard/corsola/usb_pd_policy.c
new file mode 100644
index 0000000000..46373be5e8
--- /dev/null
+++ b/baseboard/corsola/usb_pd_policy.c
@@ -0,0 +1,236 @@
+/* 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 "adc.h"
+#include "atomic.h"
+#include "baseboard_common.h"
+#include "charge_manager.h"
+#include "chipset.h"
+#include "timer.h"
+#include "usb_dp_alt_mode.h"
+#include "usb_mux.h"
+#include "usb_pd.h"
+#include "usbc_ppc.h"
+
+#if CONFIG_USB_PD_3A_PORTS != 1
+#error Asurada reference must have at least one 3.0 A port
+#endif
+
+#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
+#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
+
+int svdm_get_hpd_gpio(int port)
+{
+	/* HPD is low active, inverse the result */
+	return !gpio_get_level(GPIO_EC_DPBRDG_HPD_ODL);
+}
+
+void svdm_set_hpd_gpio(int port, int en)
+{
+	/*
+	 * HPD is low active, inverse the en
+	 * TODO: C0&C1 shares the same HPD, implement FCFS policy.
+	 */
+	gpio_set_level(GPIO_EC_DPBRDG_HPD_ODL, !en);
+}
+
+/**
+ * Is the port fine to be muxed its DisplayPort lines?
+ *
+ * Only one port can be muxed to DisplayPort at a time.
+ *
+ * @param port	Port number of TCPC.
+ * @return	1 is fine; 0 is bad as other port is already muxed;
+ */
+static int is_dp_muxable(int port)
+{
+	int i;
+
+	for (i = 0; i < board_get_usb_pd_port_count(); i++) {
+		if (i != port) {
+			if (usb_mux_get(i) & USB_PD_MUX_DP_ENABLED)
+				return 0;
+		}
+	}
+
+	return 1;
+}
+
+__override int svdm_dp_attention(int port, uint32_t *payload)
+{
+	int lvl = PD_VDO_DPSTS_HPD_LVL(payload[1]);
+	int irq = PD_VDO_DPSTS_HPD_IRQ(payload[1]);
+#ifdef CONFIG_USB_PD_DP_HPD_GPIO
+	int cur_lvl = svdm_get_hpd_gpio(port);
+#endif /* CONFIG_USB_PD_DP_HPD_GPIO */
+	mux_state_t mux_state;
+
+	dp_status[port] = payload[1];
+
+	if (!is_dp_muxable(port)) {
+		/* TODO(waihong): Info user? */
+		CPRINTS("p%d: The other port is already muxed.", port);
+		return 0; /* nak */
+	}
+
+	if (lvl)
+		gpio_set_level_verbose(CC_USBPD, GPIO_DP_AUX_PATH_SEL, port);
+
+	if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND) &&
+	    (irq || lvl))
+		/*
+		 * Wake up the AP.  IRQ or level high indicates a DP sink is now
+		 * present.
+		 */
+		if (IS_ENABLED(CONFIG_MKBP_EVENT))
+			pd_notify_dp_alt_mode_entry(port);
+
+	/* Its initial DP status message prior to config */
+	if (!(dp_flags[port] & DP_FLAGS_DP_ON)) {
+		if (lvl)
+			dp_flags[port] |= DP_FLAGS_HPD_HI_PENDING;
+		return 1;
+	}
+
+#ifdef CONFIG_USB_PD_DP_HPD_GPIO
+	if (irq && !lvl) {
+		/*
+		 * IRQ can only be generated when the level is high, because
+		 * the IRQ is signaled by a short low pulse from the high level.
+		 */
+		CPRINTF("ERR:HPD:IRQ&LOW\n");
+		return 0; /* nak */
+	}
+
+	if (irq && cur_lvl) {
+		uint64_t now = get_time().val;
+		/* wait for the minimum spacing between IRQ_HPD if needed */
+		if (now < svdm_hpd_deadline[port])
+			usleep(svdm_hpd_deadline[port] - now);
+
+		/* generate IRQ_HPD pulse */
+		svdm_set_hpd_gpio(port, 0);
+		/*
+		 * b/171172053#comment14: since the HPD_DSTREAM_DEBOUNCE_IRQ is
+		 * very short (500us), we can use udelay instead of usleep for
+		 * more stable pulse period.
+		 */
+		udelay(HPD_DSTREAM_DEBOUNCE_IRQ);
+		svdm_set_hpd_gpio(port, 1);
+	} else {
+		svdm_set_hpd_gpio(port, lvl);
+	}
+
+	/* set the minimum time delay (2ms) for the next HPD IRQ */
+	svdm_hpd_deadline[port] = get_time().val + HPD_USTREAM_DEBOUNCE_LVL;
+#endif /* CONFIG_USB_PD_DP_HPD_GPIO */
+
+	mux_state = (lvl ? USB_PD_MUX_HPD_LVL : USB_PD_MUX_HPD_LVL_DEASSERTED) |
+		    (irq ? USB_PD_MUX_HPD_IRQ : USB_PD_MUX_HPD_IRQ_DEASSERTED);
+	usb_mux_hpd_update(port, mux_state);
+
+#ifdef USB_PD_PORT_TCPC_MST
+	if (port == USB_PD_PORT_TCPC_MST)
+		baseboard_mst_enable_control(port, lvl);
+#endif
+
+	/* ack */
+	return 1;
+}
+
+__override void svdm_exit_dp_mode(int port)
+{
+#ifdef CONFIG_USB_PD_DP_HPD_GPIO
+	svdm_set_hpd_gpio(port, 0);
+#endif /* CONFIG_USB_PD_DP_HPD_GPIO */
+	usb_mux_hpd_update(port, USB_PD_MUX_HPD_LVL_DEASSERTED |
+				 USB_PD_MUX_HPD_IRQ_DEASSERTED);
+
+#ifdef USB_PD_PORT_TCPC_MST
+	if (port == USB_PD_PORT_TCPC_MST)
+		baseboard_mst_enable_control(port, 0);
+#endif
+}
+
+int pd_snk_is_vbus_provided(int port)
+{
+	static int vbus_prev[CONFIG_USB_PD_PORT_MAX_COUNT];
+	int vbus;
+
+	if ((IS_ENABLED(BOARD_HAYATO) && board_get_version() < 4) ||
+	    (IS_ENABLED(BOARD_SPHERION) && board_get_version() < 1))
+		return ppc_is_vbus_present(port);
+
+	/*
+	 * (b:181203590#comment20) TODO(yllin): use
+	 *  PD_VSINK_DISCONNECT_PD for non-5V case.
+	 */
+	vbus = adc_read_channel(board_get_vbus_adc(port)) >=
+	       PD_V_SINK_DISCONNECT_MAX;
+
+#ifdef CONFIG_USB_CHARGER
+	/*
+	 * There's no PPC to inform VBUS change for usb_charger, so inform
+	 * the usb_charger now.
+	 */
+	if (!!(vbus_prev[port] != vbus))
+		usb_charger_vbus_change(port, vbus);
+
+	if (vbus)
+		atomic_or(&vbus_prev[port], 1);
+	else
+		atomic_clear(&vbus_prev[port]);
+#endif
+	return vbus;
+}
+
+void pd_power_supply_reset(int port)
+{
+	int prev_en;
+
+	prev_en = ppc_is_sourcing_vbus(port);
+
+	/* Disable VBUS. */
+	ppc_vbus_source_enable(port, 0);
+
+	/* Enable discharge if we were previously sourcing 5V */
+	if (prev_en)
+		pd_set_vbus_discharge(port, 1);
+
+	/* Notify host of power info change. */
+	pd_send_host_event(PD_EVENT_POWER_CHANGE);
+}
+
+int pd_check_vconn_swap(int port)
+{
+	/* Allow Vconn swap if AP is on. */
+	return chipset_in_state(CHIPSET_STATE_SUSPEND | CHIPSET_STATE_ON);
+}
+
+int pd_set_power_supply_ready(int port)
+{
+	int rv;
+
+	/* Disable charging. */
+	rv = ppc_vbus_sink_enable(port, 0);
+	if (rv)
+		return rv;
+
+	pd_set_vbus_discharge(port, 0);
+
+	/* Provide Vbus. */
+	rv = ppc_vbus_source_enable(port, 1);
+	if (rv)
+		return rv;
+
+	/* Notify host of power info change. */
+	pd_send_host_event(PD_EVENT_POWER_CHANGE);
+
+	return EC_SUCCESS;
+}
+
+int board_vbus_source_enabled(int port)
+{
+	return ppc_is_sourcing_vbus(port);
+}
diff --git a/baseboard/corsola/usbc_config.c b/baseboard/corsola/usbc_config.c
new file mode 100644
index 0000000000..e552c97771
--- /dev/null
+++ b/baseboard/corsola/usbc_config.c
@@ -0,0 +1,431 @@
+/* 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.
+ */
+
+/* Asurada baseboard-specific USB-C configuration */
+
+#include "adc.h"
+#include "baseboard_common.h"
+#include "bc12/pi3usb9201_public.h"
+#include "bc12/mt6360_public.h"
+#include "button.h"
+#include "charger.h"
+#include "charge_state_v2.h"
+#include "charger/isl923x_public.h"
+#include "console.h"
+#include "ec_commands.h"
+#include "extpower.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "i2c.h"
+#include "lid_switch.h"
+#include "task.h"
+#include "ppc/syv682x_public.h"
+#include "power.h"
+#include "power_button.h"
+#include "spi.h"
+#include "switch.h"
+#include "tablet_mode.h"
+#include "tcpm/it8xxx2_pd_public.h"
+#include "uart.h"
+#include "usbc_ppc.h"
+#include "usb_charge.h"
+#include "usb_mux.h"
+#include "usb_mux/ps8743_public.h"
+#include "usb_mux/it5205_public.h"
+#include "usb_pd_tcpm.h"
+#include "usbc_ppc.h"
+
+#define CPRINTSUSB(format, args...) cprints(CC_USBCHARGE, format, ## args)
+#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args)
+#define CPRINTF(format, args...) cprintf(CC_SYSTEM, format, ## args)
+
+const struct charger_config_t chg_chips[] = {
+	{
+		.i2c_port = I2C_PORT_CHARGER,
+		.i2c_addr_flags = ISL923X_ADDR_FLAGS,
+		.drv = &isl923x_drv,
+	},
+};
+
+/* Baseboard */
+
+static void baseboard_init(void)
+{
+	gpio_enable_interrupt(GPIO_USB_C0_BC12_INT_ODL);
+	gpio_enable_interrupt(GPIO_AP_XHCI_INIT_DONE);
+}
+DECLARE_HOOK(HOOK_INIT, baseboard_init, HOOK_PRIO_DEFAULT-1);
+
+/* Sub-board */
+
+enum board_sub_board board_get_sub_board(void)
+{
+	static enum board_sub_board sub = SUB_BOARD_NONE;
+
+	if (sub != SUB_BOARD_NONE)
+		return sub;
+
+	/* HDMI board has external pull high. */
+	if (gpio_get_level(GPIO_EC_X_GPIO3)) {
+		sub = SUB_BOARD_HDMI;
+		/* Only has 1 PPC with HDMI subboard */
+		ppc_cnt = 1;
+		/* EC_X_GPIO1 */
+		gpio_set_flags(GPIO_EN_HDMI_PWR, GPIO_OUT_HIGH);
+		/* X_EC_GPIO2 */
+		gpio_set_flags(GPIO_PS185_EC_DP_HPD, GPIO_INT_BOTH);
+		/* EC_X_GPIO3 */
+		gpio_set_flags(GPIO_PS185_PWRDN_ODL, GPIO_ODR_HIGH);
+	} else {
+		sub = SUB_BOARD_TYPEC;
+		/* EC_X_GPIO1 */
+		gpio_set_flags(GPIO_USB_C1_FRS_EN, GPIO_OUT_LOW);
+		/* X_EC_GPIO2 */
+		gpio_set_flags(GPIO_USB_C1_PPC_INT_ODL,
+			       GPIO_INT_BOTH | GPIO_PULL_UP);
+		/* EC_X_GPIO3 */
+		gpio_set_flags(GPIO_USB_C1_DP_IN_HPD, GPIO_OUT_LOW);
+	}
+
+	CPRINTS("Detect %s SUB", sub == SUB_BOARD_HDMI ? "HDMI" : "TYPEC");
+	return sub;
+}
+
+static void sub_board_init(void)
+{
+	board_get_sub_board();
+}
+DECLARE_HOOK(HOOK_INIT, sub_board_init, HOOK_PRIO_INIT_I2C - 1);
+
+/* Detect subboard */
+static void board_tcpc_init(void)
+{
+	gpio_enable_interrupt(GPIO_USB_C0_PPC_INT_ODL);
+	/* C1: GPIO_USB_C1_PPC_INT_ODL & HDMI: GPIO_PS185_EC_DP_HPD */
+	gpio_enable_interrupt(GPIO_X_EC_GPIO2);
+
+	/* If this is not a Type-C subboard, disable the task. */
+	if (board_get_sub_board() != SUB_BOARD_TYPEC)
+		task_disable_task(TASK_ID_PD_C1);
+}
+/* Must be done after I2C and subboard */
+DECLARE_HOOK(HOOK_INIT, board_tcpc_init, HOOK_PRIO_INIT_I2C + 1);
+
+/* PPC */
+struct ppc_config_t ppc_chips[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	{
+		.i2c_port = I2C_PORT_PPC0,
+		.i2c_addr_flags = SYV682X_ADDR0_FLAGS,
+		.drv = &syv682x_drv,
+		.frs_en = GPIO_USB_C0_FRS_EN,
+	},
+	{
+		.i2c_port = I2C_PORT_PPC1,
+		.i2c_addr_flags = SYV682X_ADDR0_FLAGS,
+		.drv = &syv682x_drv,
+		.frs_en = GPIO_USB_C1_FRS_EN,
+	},
+};
+unsigned int ppc_cnt = ARRAY_SIZE(ppc_chips);
+
+/* BC12 */
+const struct mt6360_config_t mt6360_config = {
+	.i2c_port = I2C_PORT_POWER,
+	.i2c_addr_flags = MT6360_PMU_I2C_ADDR_FLAGS,
+};
+
+const struct pi3usb9201_config_t
+		pi3usb9201_bc12_chips[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	/* [0]: unused */
+	[1] = {
+		.i2c_port = I2C_PORT_PPC1,
+		.i2c_addr_flags = PI3USB9201_I2C_ADDR_3_FLAGS,
+	}
+};
+
+struct bc12_config bc12_ports[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	{ .drv = &mt6360_drv },
+	{ .drv = &pi3usb9201_drv },
+};
+
+void bc12_interrupt(enum gpio_signal signal)
+{
+	if (signal == GPIO_USB_C0_BC12_INT_ODL)
+		task_set_event(TASK_ID_USB_CHG_P0, USB_CHG_EVENT_BC12);
+	else
+		task_set_event(TASK_ID_USB_CHG_P1, USB_CHG_EVENT_BC12);
+}
+
+static void board_sub_bc12_init(void)
+{
+	if (board_get_sub_board() == SUB_BOARD_TYPEC)
+		gpio_enable_interrupt(GPIO_USB_C1_BC12_INT_L);
+	else
+		/* If this is not a Type-C subboard, disable the task. */
+		task_disable_task(TASK_ID_USB_CHG_P1);
+}
+/* Must be done after I2C and subboard */
+DECLARE_HOOK(HOOK_INIT, board_sub_bc12_init, HOOK_PRIO_INIT_I2C + 1);
+
+void ppc_interrupt(enum gpio_signal signal)
+{
+	if (signal == GPIO_USB_C0_PPC_INT_ODL)
+		/* C0: PPC interrupt */
+		syv682x_interrupt(0);
+}
+
+__override uint8_t board_get_usb_pd_port_count(void)
+{
+	if (board_get_sub_board() == SUB_BOARD_TYPEC)
+		return CONFIG_USB_PD_PORT_MAX_COUNT;
+	else
+		return CONFIG_USB_PD_PORT_MAX_COUNT - 1;
+}
+
+/* USB-A */
+const int usb_port_enable[] = {
+	GPIO_EN_PP5000_USB_A0_VBUS,
+};
+BUILD_ASSERT(ARRAY_SIZE(usb_port_enable) == USB_PORT_COUNT);
+
+void usb_a0_interrupt(enum gpio_signal signal)
+{
+	enum usb_charge_mode mode = gpio_get_level(signal) ?
+		USB_CHARGE_MODE_ENABLED : USB_CHARGE_MODE_DISABLED;
+
+	for (int i = 0; i < USB_PORT_COUNT; i++)
+		usb_charge_set_mode(i, mode, USB_ALLOW_SUSPEND_CHARGE);
+}
+
+static int board_ps8743_mux_set(const struct usb_mux *me,
+				mux_state_t mux_state)
+{
+	int rv = EC_SUCCESS;
+	int reg = 0;
+
+	rv = ps8743_read(me, PS8743_REG_MODE, &reg);
+	if (rv)
+		return rv;
+
+	/* Disable FLIP pin, enable I2C control. */
+	reg |= PS8743_MODE_FLIP_REG_CONTROL;
+	/* Disable CE_USB pin, enable I2C control. */
+	reg |= PS8743_MODE_USB_REG_CONTROL;
+	/* Disable CE_DP pin, enable I2C control. */
+	reg |= PS8743_MODE_DP_REG_CONTROL;
+
+	/*
+	 * DP specific config
+	 *
+	 * Enable/Disable IN_HPD on the DB.
+	 */
+	gpio_set_level(GPIO_USB_C1_DP_IN_HPD,
+		       mux_state & USB_PD_MUX_DP_ENABLED);
+
+	return ps8743_write(me, PS8743_REG_MODE, reg);
+}
+
+const struct usb_mux usbc0_virtual_mux = {
+	.usb_port = 0,
+	.driver = &virtual_usb_mux_driver,
+	.hpd_update = &virtual_hpd_update,
+};
+
+const struct usb_mux usbc1_virtual_mux = {
+	.usb_port = 1,
+	.driver = &virtual_usb_mux_driver,
+	.hpd_update = &virtual_hpd_update,
+};
+
+const struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	{
+		.usb_port = 0,
+		.i2c_port = I2C_PORT_USB_MUX0,
+		.i2c_addr_flags = IT5205_I2C_ADDR1_FLAGS,
+		.driver = &it5205_usb_mux_driver,
+		.next_mux = &usbc0_virtual_mux,
+	},
+	{
+		.usb_port = 1,
+		.i2c_port = I2C_PORT_USB_MUX1,
+		.i2c_addr_flags = PS8743_I2C_ADDR0_FLAG,
+		.driver = &ps8743_usb_mux_driver,
+		.next_mux = &usbc1_virtual_mux,
+		.board_set = &board_ps8743_mux_set,
+	},
+};
+
+void board_overcurrent_event(int port, int is_overcurrented)
+{
+	/* TODO: check correct operation for Asurada */
+}
+
+/* TCPC */
+const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	{
+		.bus_type = EC_BUS_TYPE_EMBEDDED,
+		/* TCPC is embedded within EC so no i2c config needed */
+		.drv = &it8xxx2_tcpm_drv,
+		/* Alert is active-low, push-pull */
+		.flags = 0,
+	},
+	{
+		.bus_type = EC_BUS_TYPE_EMBEDDED,
+		/* TCPC is embedded within EC so no i2c config needed */
+		.drv = &it8xxx2_tcpm_drv,
+		/* Alert is active-low, push-pull */
+		.flags = 0,
+	},
+};
+
+uint16_t tcpc_get_alert_status(void)
+{
+	/*
+	 * C0 & C1: TCPC is embedded in the EC and processes interrupts in the
+	 * chip code (it83xx/intc.c)
+	 */
+	return 0;
+}
+
+void board_reset_pd_mcu(void)
+{
+	/*
+	 * C0 & C1: TCPC is embedded in the EC and processes interrupts in the
+	 * chip code (it83xx/intc.c)
+	 */
+}
+
+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);
+}
+
+void board_pd_vconn_ctrl(int port, enum usbpd_cc_pin cc_pin, int enabled)
+{
+	/*
+	 * We ignore the cc_pin and PPC vconn because polarity and PPC vconn
+	 * should already be set correctly in the PPC driver via the pd
+	 * state machine.
+	 */
+}
+
+int board_set_active_charge_port(int port)
+{
+	int i;
+	int is_valid_port = port == 0 || (port == 1 && board_get_sub_board() ==
+							       SUB_BOARD_TYPEC);
+
+	if (!is_valid_port && port != CHARGE_PORT_NONE)
+		return EC_ERROR_INVAL;
+
+	if (port == CHARGE_PORT_NONE) {
+		CPRINTS("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))
+				CPRINTS("Disabling C%d as sink failed.", i);
+		}
+
+		return EC_SUCCESS;
+	}
+
+	/* Check if the port is sourcing VBUS. */
+	if (ppc_is_sourcing_vbus(port)) {
+		CPRINTS("Skip enable C%d", port);
+		return EC_ERROR_INVAL;
+	}
+
+	CPRINTS("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))
+			CPRINTS("C%d: sink path disable failed.", i);
+	}
+
+	/* Enable requested charge port. */
+	if (ppc_vbus_sink_enable(port, 1)) {
+		CPRINTS("C%d: sink path enable failed.", port);
+		return EC_ERROR_UNKNOWN;
+	}
+
+	return EC_SUCCESS;
+}
+
+/**
+ * Handle PS185 HPD changing state.
+ */
+int debounced_hpd;
+
+static void ps185_hdmi_hpd_deferred(void)
+{
+	const int new_hpd = gpio_get_level(GPIO_PS185_EC_DP_HPD);
+
+	/* HPD status not changed, probably a glitch, just return. */
+	if (debounced_hpd == new_hpd)
+		return;
+
+	debounced_hpd = new_hpd;
+
+	gpio_set_level(GPIO_EC_DPBRDG_HPD_ODL, !debounced_hpd);
+	CPRINTS(debounced_hpd ? "HDMI plug" : "HDMI unplug");
+}
+DECLARE_DEFERRED(ps185_hdmi_hpd_deferred);
+
+#define PS185_HPD_DEBOUCE 250
+
+static void hdmi_hpd_interrupt(enum gpio_signal signal)
+{
+	hook_call_deferred(&ps185_hdmi_hpd_deferred_data, PS185_HPD_DEBOUCE);
+}
+
+/* HDMI/TYPE-C function shared subboard interrupt */
+void x_ec_interrupt(enum gpio_signal signal)
+{
+	int sub = board_get_sub_board();
+
+	if (sub == SUB_BOARD_TYPEC)
+		/* C1: PPC interrupt */
+		syv682x_interrupt(1);
+	else if (sub == SUB_BOARD_HDMI)
+		hdmi_hpd_interrupt(signal);
+	else
+		CPRINTS("Undetected subboard interrupt.");
+}
+
+int ppc_get_alert_status(int port)
+{
+	if (port == 0)
+		return gpio_get_level(GPIO_USB_C0_PPC_INT_ODL) == 0;
+	if (port == 1 && board_get_sub_board() == SUB_BOARD_TYPEC)
+		return gpio_get_level(GPIO_USB_C1_PPC_INT_ODL) == 0;
+
+	return 0;
+}
+
+#ifdef CONFIG_USB_PD_VBUS_MEASURE_ADC_EACH_PORT
+enum adc_channel board_get_vbus_adc(int port)
+{
+	if (port == 0)
+		return  ADC_VBUS_C0;
+	if (port == 1)
+		return  ADC_VBUS_C1;
+	CPRINTSUSB("Unknown vbus adc port id: %d", port);
+	return ADC_VBUS_C0;
+}
+#endif /* CONFIG_USB_PD_VBUS_MEASURE_ADC_EACH_PORT */
diff --git a/board/krabby/battery.c b/board/krabby/battery.c
new file mode 100644
index 0000000000..f07c38e1b8
--- /dev/null
+++ b/board/krabby/battery.c
@@ -0,0 +1,47 @@
+/* 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 "battery_fuel_gauge.h"
+#include "battery_smart.h"
+#include "charge_manager.h"
+#include "chipset.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "system.h"
+#include "usb_pd.h"
+
+const struct board_batt_params board_battery_info[] = {
+	[BATTERY_C235] = {
+		.fuel_gauge = {
+			.manuf_name = "AS3GWRc3KA",
+			.device_name = "C235-41",
+			.ship_mode = {
+				.reg_addr = 0x0,
+				.reg_data = { 0x10, 0x10 },
+			},
+			.fet = {
+				.reg_addr = 0x99,
+				.reg_mask = 0x0c,
+				.disconnect_val = 0x0c,
+			}
+		},
+		.batt_info = {
+			.voltage_max		= 8800,
+			.voltage_normal		= 7700,
+			.voltage_min		= 6000,
+			.precharge_current	= 256,
+			.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	= 60,
+		},
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
+
+const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_C235;
diff --git a/board/krabby/board.c b/board/krabby/board.c
new file mode 100644
index 0000000000..9ee94a22af
--- /dev/null
+++ b/board/krabby/board.c
@@ -0,0 +1,420 @@
+/* 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.
+ */
+/* Asurada board configuration */
+
+#include "adc.h"
+#include "button.h"
+#include "charge_manager.h"
+#include "charge_state_v2.h"
+#include "charger.h"
+#include "chipset.h"
+#include "common.h"
+#include "console.h"
+#include "driver/accel_lis2dw12.h"
+#include "driver/accelgyro_bmi_common.h"
+#include "driver/accelgyro_icm_common.h"
+#include "driver/accelgyro_icm426xx.h"
+#include "driver/als_tcs3400.h"
+#include "driver/tcpm/it83xx_pd.h"
+#include "driver/temp_sensor/thermistor.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "i2c.h"
+#include "keyboard_scan.h"
+#include "lid_switch.h"
+#include "motion_sense.h"
+#include "power.h"
+#include "pwm.h"
+#include "pwm_chip.h"
+#include "regulator.h"
+#include "spi.h"
+#include "switch.h"
+#include "tablet_mode.h"
+#include "task.h"
+#include "temp_sensor.h"
+#include "timer.h"
+#include "uart.h"
+
+/* Initialize board. */
+static void board_init(void)
+{
+	/* Enable motion sensor interrupt */
+	gpio_enable_interrupt(GPIO_BASE_IMU_INT_L);
+	gpio_enable_interrupt(GPIO_LID_ACCEL_INT_L);
+}
+DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
+
+/* Sensor */
+static struct mutex g_base_mutex;
+static struct mutex g_lid_mutex;
+
+static struct bmi_drv_data_t g_bmi160_data;
+static struct stprivate_data g_lis2dwl_data;
+static struct icm_drv_data_t g_icm426xx_data;
+
+enum base_accelgyro_type {
+	BASE_GYRO_NONE = 0,
+	BASE_GYRO_BMI160 = 1,
+	BASE_GYRO_ICM426XX = 2,
+};
+
+static enum base_accelgyro_type base_accelgyro_config;
+
+#ifdef BOARD_ASURADA_REV0
+/* Matrix to rotate accelerometer into standard reference frame */
+/* for rev 0 */
+static const mat33_fp_t base_standard_ref_rev0 = {
+	{FLOAT_TO_FP(-1), 0, 0},
+	{0, FLOAT_TO_FP(1), 0},
+	{0, 0, FLOAT_TO_FP(-1)},
+};
+
+static void update_rotation_matrix(void)
+{
+	motion_sensors[BASE_ACCEL].rot_standard_ref =
+		&base_standard_ref_rev0;
+	motion_sensors[BASE_GYRO].rot_standard_ref =
+		&base_standard_ref_rev0;
+}
+DECLARE_HOOK(HOOK_INIT, update_rotation_matrix, HOOK_PRIO_INIT_ADC + 2);
+
+/* 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 */
+		.cover_scale = ALS_CHANNEL_SCALE(1.0),     /* CT */
+	},
+};
+
+static struct tcs3400_rgb_drv_data_t g_tcs3400_rgb_data = {
+	/*
+	 * TODO: calculate the actual coefficients and scaling factors
+	 */
+	.calibration.rgb_cal[X] = {
+		.offset = 0,
+		.scale = {
+			.k_channel_scale = ALS_CHANNEL_SCALE(1.0), /* kr */
+			.cover_scale = ALS_CHANNEL_SCALE(1.0)
+		},
+		.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(0),
+	},
+	.calibration.rgb_cal[Y] = {
+		.offset = 0,
+		.scale = {
+			.k_channel_scale = ALS_CHANNEL_SCALE(1.0), /* kg */
+			.cover_scale = ALS_CHANNEL_SCALE(1.0)
+		},
+		.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(0.1),
+	},
+	.calibration.rgb_cal[Z] = {
+		.offset = 0,
+		.scale = {
+			.k_channel_scale = ALS_CHANNEL_SCALE(1.0), /* kb */
+			.cover_scale = ALS_CHANNEL_SCALE(1.0)
+		},
+		.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(0),
+	},
+	.calibration.irt = INT_TO_FP(1),
+	.saturation.again = TCS_DEFAULT_AGAIN,
+	.saturation.atime = TCS_DEFAULT_ATIME,
+};
+#endif /* BOARD_ASURADA_REV0 */
+
+#ifdef BOARD_HAYATO
+/* Matrix to rotate accelerometer into standard reference frame */
+/* for Hayato */
+static const mat33_fp_t base_standard_ref = {
+	{0, FLOAT_TO_FP(1), 0},
+	{FLOAT_TO_FP(-1), 0, 0},
+	{0, 0, FLOAT_TO_FP(1)},
+};
+
+static void update_rotation_matrix(void)
+{
+	if (base_accelgyro_config == BASE_GYRO_ICM426XX)
+		return;
+
+	if (board_get_version() >= 2) {
+		motion_sensors[BASE_ACCEL].rot_standard_ref =
+			&base_standard_ref;
+		motion_sensors[BASE_GYRO].rot_standard_ref =
+			&base_standard_ref;
+	}
+}
+DECLARE_HOOK(HOOK_INIT, update_rotation_matrix, HOOK_PRIO_INIT_ADC + 2);
+
+#endif
+
+struct motion_sensor_t icm426xx_base_accel = {
+	.name = "Base Accel",
+	.active_mask = SENSOR_ACTIVE_S0_S3,
+	.chip = MOTIONSENSE_CHIP_ICM426XX,
+	.type = MOTIONSENSE_TYPE_ACCEL,
+	.location = MOTIONSENSE_LOC_BASE,
+	.drv = &icm426xx_drv,
+	.mutex = &g_base_mutex,
+	.drv_data = &g_icm426xx_data,
+	.port = I2C_PORT_ACCEL,
+	.i2c_spi_addr_flags = ICM426XX_ADDR0_FLAGS,
+	.default_range = 4, /* g, to meet CDD 7.3.1/C-1-4 reqs. */
+	.rot_standard_ref = NULL,
+	.min_frequency = ICM426XX_ACCEL_MIN_FREQ,
+	.max_frequency = ICM426XX_ACCEL_MAX_FREQ,
+	.config = {
+		/* EC use accel for angle detection */
+		[SENSOR_CONFIG_EC_S0] = {
+			.odr = 10000 | ROUND_UP_FLAG,
+			.ec_rate = 100 * MSEC,
+		},
+		[SENSOR_CONFIG_EC_S3] = {
+			.odr = 10000 | ROUND_UP_FLAG,
+		},
+	},
+};
+
+struct motion_sensor_t icm426xx_base_gyro = {
+	.name = "Base Gyro",
+	.active_mask = SENSOR_ACTIVE_S0_S3,
+	.chip = MOTIONSENSE_CHIP_ICM426XX,
+	.type = MOTIONSENSE_TYPE_GYRO,
+	.location = MOTIONSENSE_LOC_BASE,
+	.drv = &icm426xx_drv,
+	.mutex = &g_base_mutex,
+	.port = I2C_PORT_ACCEL,
+	.i2c_spi_addr_flags = ICM426XX_ADDR0_FLAGS,
+	.default_range = 1000, /* dps */
+	.rot_standard_ref = NULL,
+	.min_frequency = ICM426XX_GYRO_MIN_FREQ,
+	.max_frequency = ICM426XX_GYRO_MAX_FREQ,
+};
+
+struct motion_sensor_t motion_sensors[] = {
+	/*
+	 * Note: bmi160: supports accelerometer and gyro sensor
+	 * Requirement: accelerometer sensor must init before gyro sensor
+	 * DO NOT change the order of the following table.
+	 */
+	[BASE_ACCEL] = {
+		.name = "Base Accel",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_BMI160,
+		.type = MOTIONSENSE_TYPE_ACCEL,
+		.location = MOTIONSENSE_LOC_BASE,
+		.drv = &bmi160_drv,
+		.mutex = &g_base_mutex,
+		.drv_data = &g_bmi160_data,
+		.port = I2C_PORT_ACCEL,
+		.i2c_spi_addr_flags = BMI160_ADDR0_FLAGS,
+		.rot_standard_ref = NULL, /* identity matrix */
+		.default_range = 4,  /* g, to meet CDD 7.3.1/C-1-4 reqs */
+		.min_frequency = BMI_ACCEL_MIN_FREQ,
+		.max_frequency = BMI_ACCEL_MAX_FREQ,
+		.config = {
+			/* Sensor on for angle detection */
+			[SENSOR_CONFIG_EC_S0] = {
+				.odr = 10000 | ROUND_UP_FLAG,
+				.ec_rate = 100 * MSEC,
+			},
+			/* Sensor on for angle detection */
+			[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_BMI160,
+		.type = MOTIONSENSE_TYPE_GYRO,
+		.location = MOTIONSENSE_LOC_BASE,
+		.drv = &bmi160_drv,
+		.mutex = &g_base_mutex,
+		.drv_data = &g_bmi160_data,
+		.port = I2C_PORT_ACCEL,
+		.i2c_spi_addr_flags = BMI160_ADDR0_FLAGS,
+		.default_range = 1000, /* dps */
+		.rot_standard_ref = NULL, /* identity matrix */
+		.min_frequency = BMI_GYRO_MIN_FREQ,
+		.max_frequency = BMI_GYRO_MAX_FREQ,
+	},
+	[LID_ACCEL] = {
+		.name = "Lid Accel",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_LIS2DWL,
+		.type = MOTIONSENSE_TYPE_ACCEL,
+		.location = MOTIONSENSE_LOC_LID,
+		.drv = &lis2dw12_drv,
+		.mutex = &g_lid_mutex,
+		.drv_data = &g_lis2dwl_data,
+		.int_signal = GPIO_LID_ACCEL_INT_L,
+		.port = I2C_PORT_ACCEL,
+		.i2c_spi_addr_flags = LIS2DWL_ADDR1_FLAGS,
+		.flags = MOTIONSENSE_FLAG_INT_SIGNAL,
+		.rot_standard_ref = NULL, /* 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 = 12500 | ROUND_UP_FLAG,
+			},
+			/* Sensor on for lid angle detection */
+			[SENSOR_CONFIG_EC_S3] = {
+				.odr = 10000 | ROUND_UP_FLAG,
+			},
+		},
+	},
+#ifdef BOARD_ASURADA_REV0
+	[CLEAR_ALS] = {
+		.name = "Clear Light",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_TCS3400,
+		.type = MOTIONSENSE_TYPE_LIGHT,
+		.location = MOTIONSENSE_LOC_LID,
+		.drv = &tcs3400_drv,
+		.drv_data = &g_tcs3400_data,
+		.port = I2C_PORT_ACCEL,
+		.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] = {
+		.name = "RGB Light",
+		.active_mask = SENSOR_ACTIVE_S0_S3,
+		.chip = MOTIONSENSE_CHIP_TCS3400,
+		.type = MOTIONSENSE_TYPE_LIGHT_RGB,
+		.location = MOTIONSENSE_LOC_LID,
+		.drv = &tcs3400_rgb_drv,
+		.drv_data = &g_tcs3400_rgb_data,
+		.rot_standard_ref = NULL,
+		.default_range = 0x10000, /* scale = 1x, uscale = 0 */
+		/* freq = 0 indicates we should not use sensor directly */
+		.min_frequency = 0,
+		.max_frequency = 0,
+	},
+#endif /* BOARD_ASURADA_REV0 */
+};
+const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors);
+
+void motion_interrupt(enum gpio_signal signal)
+{
+	if (base_accelgyro_config == BASE_GYRO_ICM426XX)
+		icm426xx_interrupt(signal);
+	else
+		bmi160_interrupt(signal);
+}
+
+static void board_detect_motionsense(void)
+{
+	int val;
+
+	if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
+		return;
+	if (base_accelgyro_config != BASE_GYRO_NONE)
+		return;
+
+	icm_read8(&icm426xx_base_accel, ICM426XX_REG_WHO_AM_I, &val);
+	if (val == ICM426XX_CHIP_ICM40608) {
+		motion_sensors[BASE_ACCEL] = icm426xx_base_accel;
+		motion_sensors[BASE_GYRO] = icm426xx_base_gyro;
+		base_accelgyro_config =  BASE_GYRO_ICM426XX;
+		ccprints("Base Accelgyro: ICM426XX");
+	} else {
+		base_accelgyro_config = BASE_GYRO_BMI160;
+		ccprints("Base Accelgyro: BMI160");
+	}
+}
+DECLARE_HOOK(HOOK_CHIPSET_STARTUP, board_detect_motionsense,
+	     HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_INIT, board_detect_motionsense, HOOK_PRIO_DEFAULT);
+
+/* ADC channels. Must be in the exactly same order as in enum adc_channel. */
+const struct adc_t adc_channels[] = {
+	/* Convert to mV (3000mV/1024). */
+	{"VBUS_C0", ADC_MAX_MVOLT * 10, ADC_READ_MAX + 1, 0, CHIP_ADC_CH0},
+	{"BOARD_ID_0", ADC_MAX_MVOLT, ADC_READ_MAX + 1, 0, CHIP_ADC_CH1},
+	{"BOARD_ID_1", ADC_MAX_MVOLT, ADC_READ_MAX + 1, 0, CHIP_ADC_CH2},
+	/* AMON/BMON gain = 17.97 */
+	{"CHARGER_AMON_R", ADC_MAX_MVOLT * 1000 / 17.97, ADC_READ_MAX + 1, 0,
+	 CHIP_ADC_CH3},
+	{"VBUS_C1", ADC_MAX_MVOLT * 10, ADC_READ_MAX + 1, 0, CHIP_ADC_CH5},
+	{"CHARGER_PMON", ADC_MAX_MVOLT, ADC_READ_MAX + 1, 0, CHIP_ADC_CH6},
+};
+BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
+
+/* PWM */
+
+/*
+ * PWM channels. Must be in the exactly same order as in enum pwm_channel.
+ * There total three 16 bits clock prescaler registers for all pwm channels,
+ * so use the same frequency and prescaler register setting is required if
+ * number of pwm channel greater than three.
+ */
+const struct pwm_t pwm_channels[] = {
+	[PWM_CH_LED1] = {
+		.channel = 0,
+		.flags = PWM_CONFIG_DSLEEP | PWM_CONFIG_ACTIVE_LOW,
+		.freq_hz = 324, /* maximum supported frequency */
+		.pcfsr_sel = PWM_PRESCALER_C4
+	},
+	[PWM_CH_LED2] = {
+		.channel = 1,
+		.flags = PWM_CONFIG_DSLEEP | PWM_CONFIG_ACTIVE_LOW,
+		.freq_hz = 324, /* maximum supported frequency */
+		.pcfsr_sel = PWM_PRESCALER_C4
+	},
+	[PWM_CH_LED3] = {
+		.channel = 2,
+		.flags = PWM_CONFIG_DSLEEP | PWM_CONFIG_ACTIVE_LOW,
+		.freq_hz = 324, /* maximum supported frequency */
+		.pcfsr_sel = PWM_PRESCALER_C4
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT);
+
+int board_accel_force_mode_mask(void)
+{
+	int version = board_get_version();
+
+	if (version == -1 || version >= 2)
+		return 0;
+	return BIT(LID_ACCEL);
+}
+
+static void board_suspend(void)
+{
+	if (board_get_version() >= 3)
+		gpio_set_level(GPIO_EN_5V_USM, 0);
+}
+DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_suspend, HOOK_PRIO_DEFAULT);
+
+static void board_resume(void)
+{
+	if (board_get_version() >= 3)
+		gpio_set_level(GPIO_EN_5V_USM, 1);
+}
+DECLARE_HOOK(HOOK_CHIPSET_RESUME, board_resume, HOOK_PRIO_DEFAULT);
diff --git a/board/krabby/board.h b/board/krabby/board.h
new file mode 100644
index 0000000000..d55f87be5c
--- /dev/null
+++ b/board/krabby/board.h
@@ -0,0 +1,142 @@
+/* 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.
+ */
+/* Asurada board configuration */
+
+#ifndef __CROS_EC_BOARD_H
+#define __CROS_EC_BOARD_H
+
+#include "baseboard.h"
+
+/* Chipset config */
+
+/* Optional features */
+#define CONFIG_LTO
+
+/*
+ * TODO: Remove this option once the VBAT no longer keeps high when
+ * system's power isn't presented.
+ */
+#define CONFIG_IT83XX_RESET_PD_CONTRACT_IN_BRAM
+
+/* BC12 */
+/* TODO(b/159583342): remove after rev0 deprecated */
+#define CONFIG_MT6360_BC12_GPIO
+
+/* LED */
+#ifdef BOARD_HAYATO
+#define CONFIG_LED_ONOFF_STATES
+#define CONFIG_LED_ONOFF_STATES_BAT_LOW 10
+#endif
+
+/* PD / USB-C / PPC */
+#define CONFIG_USB_PD_DEBUG_LEVEL 3
+#define PD_MAX_CURRENT_MA 3000
+#define PD_OPERATING_POWER_MW 15000
+#ifdef BOARD_HAYATO
+#define PD_MAX_VOLTAGE_MV 15000
+#define PD_MAX_POWER_MW 45000
+#else
+#define PD_MAX_VOLTAGE_MV 20000
+#define PD_MAX_POWER_MW 60000
+#endif
+#define PD_POWER_SUPPLY_TURN_ON_DELAY  30000  /* us */
+#define PD_POWER_SUPPLY_TURN_OFF_DELAY 250000 /* us */
+
+/* Optional console commands */
+#define CONFIG_CMD_FLASH
+#define CONFIG_CMD_SCRATCHPAD
+#define CONFIG_CMD_STACKOVERFLOW
+
+#define CONFIG_BATT_FULL_CHIPSET_OFF_INPUT_LIMIT_MV	9000
+
+/* Sensor */
+#define CONFIG_GMR_TABLET_MODE
+#define CONFIG_TABLET_MODE
+#define CONFIG_TABLET_MODE_SWITCH
+#define GMR_TABLET_MODE_GPIO_L GPIO_TABLET_MODE_L
+
+#define CONFIG_ACCELGYRO_BMI160 /* Base accel */
+#define CONFIG_ACCELGYRO_BMI160_INT_EVENT \
+	TASK_EVENT_MOTION_SENSOR_INTERRUPT(BASE_ACCEL)
+#define CONFIG_ACCELGYRO_ICM426XX /* Base accel */
+#define CONFIG_ACCELGYRO_ICM426XX_INT_EVENT \
+	TASK_EVENT_MOTION_SENSOR_INTERRUPT(BASE_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_LID_ANGLE
+#define CONFIG_LID_ANGLE_SENSOR_BASE BASE_ACCEL
+#define CONFIG_LID_ANGLE_SENSOR_LID LID_ACCEL
+#define CONFIG_LID_ANGLE_UPDATE
+
+#ifdef BOARD_ASURADA_REV0
+#define CONFIG_ALS
+#define ALS_COUNT 1
+#define CONFIG_ALS_TCS3400
+#define CONFIG_ALS_TCS3400_INT_EVENT \
+	TASK_EVENT_MOTION_SENSOR_INTERRUPT(CLEAR_ALS)
+#define CONFIG_ALS_TCS3400_EMULATED_IRQ_EVENT
+
+#define CONFIG_ACCEL_FORCE_MODE_MASK (BIT(LID_ACCEL) | BIT(CLEAR_ALS))
+#else
+/* TODO(b/171931139): remove this after rev1 board deprecated */
+#define CONFIG_ACCEL_FORCE_MODE_MASK (board_accel_force_mode_mask())
+#endif
+
+/* SPI / Host Command */
+#undef CONFIG_HOSTCMD_DEBUG_MODE
+#define CONFIG_HOSTCMD_DEBUG_MODE HCDEBUG_OFF
+
+/* USB-A */
+#define USBA_PORT_COUNT 1
+
+#ifndef __ASSEMBLER__
+
+#include "gpio_signal.h"
+#include "registers.h"
+
+enum battery_type {
+	BATTERY_C235,
+	BATTERY_TYPE_COUNT,
+};
+
+enum sensor_id {
+	BASE_ACCEL = 0,
+	BASE_GYRO,
+	LID_ACCEL,
+#ifdef BOARD_ASURADA_REV0
+	CLEAR_ALS,
+	RGB_ALS,
+#endif
+	SENSOR_COUNT,
+};
+
+enum adc_channel {
+	ADC_VBUS_C0,             /* ADC 0 */
+	ADC_BOARD_ID_0,          /* ADC 1 */
+	ADC_BOARD_ID_1,          /* ADC 2 */
+	ADC_CHARGER_AMON_R,      /* ADC 3 */
+	ADC_VBUS_C1,             /* ADC 5 */
+	ADC_CHARGER_PMON,        /* ADC 6 */
+
+	/* Number of ADC channels */
+	ADC_CH_COUNT,
+};
+
+enum pwm_channel {
+	PWM_CH_LED1,
+	PWM_CH_LED2,
+	PWM_CH_LED3,
+	PWM_CH_COUNT,
+};
+
+int board_accel_force_mode_mask(void);
+void motion_interrupt(enum gpio_signal signal);
+
+#endif /* !__ASSEMBLER__ */
+#endif /* __CROS_EC_BOARD_H */
diff --git a/board/krabby/build.mk b/board/krabby/build.mk
new file mode 100644
index 0000000000..b355dfd90d
--- /dev/null
+++ b/board/krabby/build.mk
@@ -0,0 +1,16 @@
+# -*- 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.
+#
+# Board specific files build
+
+# the IC is ITE IT8xxx2
+CHIP:=it83xx
+CHIP_FAMILY:=it8xxx2
+CHIP_VARIANT:=it81202bx_1024
+BASEBOARD:=corsola
+
+board-y=led.o
+board-y+=battery.o board.o
+board-y+=usbc_config.o
diff --git a/board/krabby/ec.tasklist b/board/krabby/ec.tasklist
new file mode 100644
index 0000000000..75dbb1a828
--- /dev/null
+++ b/board/krabby/ec.tasklist
@@ -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.
+ */
+
+/**
+ * See CONFIG_TASK_LIST in config.h for details.
+ */
+#define CONFIG_TASK_LIST \
+	TASK_ALWAYS(HOOKS, hook_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_NOTEST(CHIPSET, chipset_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_ALWAYS(CHARGER, charger_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P0, usb_charger_task, 0, VENTI_TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P1, usb_charger_task, 1, VENTI_TASK_STACK_SIZE) \
+	TASK_ALWAYS(MOTIONSENSE, motion_sense_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_NOTEST(PDCMD, pd_command_task, NULL, 1024) \
+	TASK_ALWAYS(HOSTCMD, host_command_task, NULL, 1024) \
+	TASK_ALWAYS(CONSOLE, console_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_NOTEST(KEYSCAN, keyboard_scan_task, NULL, TASK_STACK_SIZE) \
+	TASK_ALWAYS(PD_C0, pd_task, NULL, 1280) \
+	TASK_ALWAYS(PD_C1, pd_task, NULL, 1280) \
+
diff --git a/board/krabby/gpio.inc b/board/krabby/gpio.inc
new file mode 100644
index 0000000000..ce9b86c74b
--- /dev/null
+++ b/board/krabby/gpio.inc
@@ -0,0 +1,170 @@
+/* -*- 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.
+ */
+
+/* Declare symbolic names for all the GPIOs that we care about.
+ * Note: Those with interrupt handlers must be declared first. */
+
+/* Wake Source interrupts */
+GPIO_INT(POWER_BUTTON_L,     PIN(E, 4), GPIO_INT_BOTH | GPIO_PULL_UP |
+	 GPIO_HIB_WAKE_HIGH, power_button_interrupt) /* H1_EC_PWR_BTN_ODL */
+GPIO_INT(LID_OPEN,           PIN(E, 2), GPIO_INT_BOTH | GPIO_HIB_WAKE_HIGH,
+         lid_interrupt)
+GPIO_INT(TABLET_MODE_L,      PIN(J, 7), GPIO_INT_BOTH,
+         gmr_tablet_switch_isr)
+
+/* Chipset interrupts */
+GPIO_INT(AP_EC_WARM_RST_REQ, PIN(D, 3), GPIO_INT_RISING | GPIO_SEL_1P8V,
+         chipset_reset_request_interrupt)
+
+/* Power sequencing interrupts */
+GPIO_INT(AP_EC_WATCHDOG_L, PIN(C, 7), GPIO_INT_BOTH | GPIO_SEL_1P8V,
+         chipset_watchdog_interrupt)
+GPIO_INT(AP_IN_SLEEP_L, PIN(F, 2),
+         GPIO_INT_BOTH | GPIO_PULL_DOWN | GPIO_SEL_1P8V, power_signal_interrupt)
+GPIO_INT(PMIC_EC_PWRGD, PIN(F, 3),
+         GPIO_INT_BOTH | GPIO_PULL_DOWN | GPIO_SEL_1P8V, power_signal_interrupt)
+
+/* Sensor Interrupts */
+GPIO_INT(BASE_IMU_INT_L,     PIN(J, 2), GPIO_INT_FALLING | GPIO_SEL_1P8V,
+         motion_interrupt)
+GPIO_INT(LID_ACCEL_INT_L,    PIN(J, 3), GPIO_INT_FALLING | GPIO_SEL_1P8V,
+         lis2dw12_interrupt)
+#ifdef BOARD_ASURADA_REV0
+GPIO_INT(ALS_RGB_INT_ODL,    PIN(F, 0), GPIO_INT_FALLING,
+         tcs3400_interrupt)
+#else
+GPIO(ALS_RGB_INT_ODL,        PIN(F, 0), GPIO_INPUT)
+#endif
+
+/* USB-C interrupts */
+GPIO_INT(USB_C0_PPC_INT_ODL, PIN(D, 1), GPIO_INT_BOTH, ppc_interrupt)
+GPIO_INT(USB_C0_BC12_INT_ODL,PIN(J, 6), GPIO_INT_FALLING, bc12_interrupt)
+GPIO_INT(USB_C1_BC12_INT_L,  PIN(J, 4), GPIO_INT_FALLING, bc12_interrupt)
+
+/* Volume button interrupts */
+/* Note that netnames are reversed in asurada rev 0/1 */
+GPIO_INT(VOLUME_DOWN_L,      PIN(D, 5), GPIO_INT_BOTH | GPIO_PULL_UP,
+         button_interrupt) /* EC_VOLDN_BTN_ODL */
+GPIO_INT(VOLUME_UP_L,        PIN(D, 6), GPIO_INT_BOTH | GPIO_PULL_UP,
+         button_interrupt) /* EC_VOLUP_BTN_ODL */
+
+/* Other interrupts */
+GPIO_INT(AP_XHCI_INIT_DONE,  PIN(D, 2), GPIO_INT_BOTH | GPIO_PULL_DOWN | GPIO_SEL_1P8V,
+         usb_a0_interrupt)
+#ifdef BOARD_ASURADA_REV0
+GPIO_INT(AC_PRESENT,         PIN(M, 2), GPIO_INT_BOTH | GPIO_HIB_WAKE_HIGH,
+         extpower_interrupt) /* AC_OK / AC_PRESENT in rev0 */
+#else /* HAYATO */
+GPIO_INT(AC_PRESENT,         PIN(E, 5), GPIO_INT_BOTH | GPIO_HIB_WAKE_HIGH,
+         extpower_interrupt) /* AC_OK / AC_PRESENT in rev1+ */
+#endif
+GPIO_INT(UART1_RX,           PIN(B, 0), GPIO_INT_FALLING,
+         uart_deepsleep_interrupt) /* UART_DEBUG_TX_EC_RX */
+GPIO_INT(WP,                 PIN(I, 4), GPIO_INT_BOTH | GPIO_SEL_1P8V,
+         switch_interrupt) /* EC_FLASH_WP_OD */
+GPIO_INT(SPI0_CS,            PIN(M, 5), GPIO_INT_FALLING,
+         spi_event)        /* SPI slave Chip Select -- AP_SPI_EC_CS_L */
+GPIO_INT(X_EC_GPIO2,         PIN(B, 2), GPIO_ODR_HIGH, x_ec_interrupt)
+
+/* Power Sequencing Signals */
+GPIO(EC_PMIC_EN_ODL,         PIN(D, 0), GPIO_ODR_HIGH | GPIO_SEL_1P8V)
+GPIO(EC_PMIC_WATCHDOG_L,     PIN(H, 0), GPIO_ODR_LOW | GPIO_SEL_1P8V)
+GPIO(EN_PP5000_A,            PIN(C, 6), GPIO_OUT_HIGH)
+GPIO(PG_MT6315_PROC_ODL,     PIN(E, 1), GPIO_INPUT)
+GPIO(PG_MT6360_ODL,          PIN(F, 1), GPIO_INPUT)
+GPIO(PG_PP5000_A_ODL,        PIN(A, 6), GPIO_INPUT)
+GPIO(EN_SLP_Z,               PIN(E, 3), GPIO_OUT_LOW)
+GPIO(SYS_RST_ODL,            PIN(B, 6), GPIO_ODR_LOW)
+GPIO(EC_BL_EN_OD,            PIN(B, 5), GPIO_ODR_LOW | GPIO_SEL_1P8V)
+
+/* MKBP event synchronization */
+GPIO(EC_INT_L,               PIN(E, 6), GPIO_ODR_HIGH | GPIO_SEL_1P8V) /* EC_AP_INT_ODL */
+
+/* USB and USBC Signals */
+GPIO(DP_AUX_PATH_SEL,        PIN(G, 0), GPIO_OUT_HIGH)
+GPIO(EC_DPBRDG_HPD_ODL,      PIN(J, 0), GPIO_ODR_HIGH | GPIO_SEL_1P8V)
+GPIO(EN_PP5000_USB_A0_VBUS,  PIN(B, 7), GPIO_OUT_LOW)
+GPIO(USB_C0_FRS_EN,          PIN(H, 3), GPIO_OUT_LOW)
+
+/* Misc Signals */
+GPIO(EC_BATT_PRES_ODL,       PIN(C, 0), GPIO_INPUT)
+GPIO(BC12_DET_EN,            PIN(J, 5), GPIO_OUT_LOW) /* EN_USB_C0_BC12_DET */
+GPIO(EN_EC_ID_ODL,           PIN(H, 5), GPIO_ODR_LOW)
+GPIO(ENTERING_RW,            PIN(C, 5), GPIO_OUT_LOW) /* EC_ENTERING_RW */
+GPIO(EN_5V_USM,              PIN(D, 7), GPIO_OUT_LOW)
+
+/* I2C pins - Alternate function below configures I2C module on these pins */
+GPIO(I2C_A_SCL,              PIN(B, 3), GPIO_INPUT) /* I2C_CHG_BATT_SCL */
+GPIO(I2C_A_SDA,              PIN(B, 4), GPIO_INPUT) /* I2C_CHG_BATT_SDA */
+GPIO(I2C_B_SCL,              PIN(C, 1), GPIO_INPUT | GPIO_SEL_1P8V) /* I2C_SENSOR_SCL */
+GPIO(I2C_B_SDA,              PIN(C, 2), GPIO_INPUT | GPIO_SEL_1P8V) /* I2C_SENSOR_SDA */
+GPIO(I2C_C_SCL,              PIN(F, 6), GPIO_INPUT) /* I2C_USB_C0_SCL */
+GPIO(I2C_C_SDA,              PIN(F, 7), GPIO_INPUT) /* I2C_USB_C0_SCL */
+GPIO(I2C_E_SCL,              PIN(E, 0), GPIO_INPUT) /* I2C_USB_C1_SCL */
+GPIO(I2C_E_SDA,              PIN(E, 7), GPIO_INPUT) /* I2C_USB_C1_SDA */
+
+/* SPI pins - Alternate function below configures SPI module on these pins */
+
+/* NC / TP */
+
+/* Keyboard pins */
+
+/* Subboards HDMI/TYPEC */
+GPIO(EC_X_GPIO1,             PIN(H, 4), GPIO_OUT_LOW)
+GPIO(EC_X_GPIO3,             PIN(J, 1), GPIO_INPUT)
+
+/* Alternate functions GPIO definitions */
+ALTERNATE(PIN_MASK(B, 0x18), 1, MODULE_I2C, 0) /* I2C A */
+ALTERNATE(PIN_MASK(C, 0x06), 1, MODULE_I2C, GPIO_SEL_1P8V) /* I2C B */
+ALTERNATE(PIN_MASK(F, 0xC0), 1, MODULE_I2C, 0) /* I2C C */
+ALTERNATE(PIN_MASK(E, 0x81), 1, MODULE_I2C, 0) /* I2C E */
+
+/* UART */
+ALTERNATE(PIN_MASK(B, 0x03), 1, MODULE_UART, 0) /* EC to Servo */
+
+/* PWM */
+ALTERNATE(PIN_MASK(A, 0x07), 1, MODULE_PWM, 0) /* PWM 0~2 */
+
+/* ADC */
+ALTERNATE(PIN_MASK(I, 0x6F), 0, MODULE_ADC, 0) /* ADC 0,1,2,3,5,6 */
+
+/* SPI */
+ALTERNATE(PIN_MASK(M, 0x33), 0, MODULE_SPI, 0) /* SPI */
+
+/* Unimplemented Pins  */
+GPIO(SET_VMC_VOLT_AT_1V8,    PIN(D, 4), GPIO_INPUT | GPIO_PULL_DOWN | GPIO_SEL_1P8V)
+GPIO(PACKET_MODE_EN,         PIN(A, 3), GPIO_INPUT | GPIO_PULL_DOWN)
+/* b/160218054: behavior not defined */
+/* *_ODL pin has external pullup so don't pull it down. */
+GPIO(USB_A0_FAULT_ODL,       PIN(A, 7), GPIO_INPUT)
+GPIO(CHARGER_PROCHOT_ODL,    PIN(C, 3), GPIO_INPUT)
+GPIO(PG_MT6315_GPU_ODL,      PIN(H, 6), GPIO_INPUT)
+GPIO(EN_PP3000_SD_U,         PIN(G, 1), GPIO_INPUT | GPIO_PULL_DOWN | GPIO_SEL_1P8V)
+/* reserved for future use */
+GPIO(CCD_MODE_ODL,           PIN(C, 4), GPIO_INPUT)
+/*
+ * ADC pins don't have internal pull-down capability,
+ * so we set them as output low.
+ */
+GPIO(NC_GPI7,                PIN(I, 7), GPIO_OUT_LOW)
+/* NC pins, enable internal pull-up/down to avoid floating state. */
+#ifdef BOARD_ASURADA_REV0
+GPIO(NC_GPE5,                PIN(E, 5), GPIO_INPUT | GPIO_PULL_UP)
+#else /* HAYATO */
+GPIO(NC_GPM2,                PIN(M, 2), GPIO_INPUT | GPIO_PULL_DOWN)
+#endif
+GPIO(NC_GPM3,                PIN(M, 3), GPIO_INPUT | GPIO_PULL_DOWN)
+GPIO(NC_GPM6,                PIN(M, 6), GPIO_INPUT | GPIO_PULL_DOWN)
+GPIO(SPI_CLK_GPG6,           PIN(G, 6), GPIO_INPUT | GPIO_PULL_UP)
+/*
+ * These 4 pins don't have internal pull-down capability,
+ * so we set them as output low.
+ */
+GPIO(NC_GPG3,                PIN(G, 3), GPIO_OUT_LOW)
+GPIO(SPI_MOSI_GPG4,          PIN(G, 4), GPIO_OUT_LOW)
+GPIO(SPI_MISO_GPG5,          PIN(G, 5), GPIO_OUT_LOW)
+GPIO(SPI_CS_GPG7,            PIN(G, 7), GPIO_OUT_LOW)
diff --git a/board/krabby/led.c b/board/krabby/led.c
new file mode 100644
index 0000000000..1d3108c47b
--- /dev/null
+++ b/board/krabby/led.c
@@ -0,0 +1,120 @@
+/* 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 "ec_commands.h"
+#include "gpio.h"
+#include "led_common.h"
+#include "led_onoff_states.h"
+#include "chipset.h"
+#include "driver/bc12/mt6360.h"
+
+__override const int led_charge_lvl_1 = 5;
+__override const int led_charge_lvl_2 = 95;
+
+__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_WHITE,  LED_INDEFINITE} },
+	[STATE_DISCHARGE_S0]	     = {{LED_OFF,  LED_INDEFINITE} },
+	[STATE_DISCHARGE_S0_BAT_LOW] = {{EC_LED_COLOR_AMBER,  1 * LED_ONE_SEC},
+					{LED_OFF,	    3 * LED_ONE_SEC} },
+	[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_WHITE,   2 * LED_ONE_SEC},
+					{EC_LED_COLOR_AMBER, 2 * LED_ONE_SEC} },
+};
+
+__override const struct led_descriptor
+		led_pwr_state_table[PWR_LED_NUM_STATES][LED_NUM_PHASES] = {
+	[PWR_LED_STATE_ON]           = {{EC_LED_COLOR_WHITE, LED_INDEFINITE} },
+	[PWR_LED_STATE_SUSPEND_AC]   = {{EC_LED_COLOR_WHITE, 1 * LED_ONE_SEC},
+					{LED_OFF,	     3 * LED_ONE_SEC} },
+	[PWR_LED_STATE_SUSPEND_NO_AC] = {{EC_LED_COLOR_WHITE, 1 * LED_ONE_SEC},
+					{LED_OFF,	     3 * LED_ONE_SEC} },
+	[PWR_LED_STATE_OFF]           = {{LED_OFF, LED_INDEFINITE} },
+};
+
+
+const enum ec_led_id supported_led_ids[] = {
+	EC_LED_ID_BATTERY_LED,
+	EC_LED_ID_POWER_LED,
+};
+
+const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
+
+__override void led_set_color_battery(enum ec_led_colors color)
+{
+	mt6360_led_set_brightness(MT6360_LED_RGB2, 50);
+	mt6360_led_set_brightness(MT6360_LED_RGB3, 50);
+
+	switch (color) {
+	case EC_LED_COLOR_AMBER:
+		mt6360_led_enable(MT6360_LED_RGB2, 0);
+		mt6360_led_enable(MT6360_LED_RGB3, 1);
+		break;
+	case EC_LED_COLOR_WHITE:
+		mt6360_led_enable(MT6360_LED_RGB2, 1);
+		mt6360_led_enable(MT6360_LED_RGB3, 0);
+		break;
+	default: /* LED_OFF and other unsupported colors */
+		mt6360_led_enable(MT6360_LED_RGB2, 0);
+		mt6360_led_enable(MT6360_LED_RGB3, 0);
+		break;
+	}
+}
+
+__override void led_set_color_power(enum ec_led_colors color)
+{
+	mt6360_led_set_brightness(MT6360_LED_RGB1, 1);
+	mt6360_led_enable(MT6360_LED_RGB1, color == EC_LED_COLOR_WHITE);
+}
+
+void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
+{
+	if (led_id == EC_LED_ID_BATTERY_LED) {
+		brightness_range[EC_LED_COLOR_AMBER] =
+				MT6360_LED_BRIGHTNESS_MAX;
+		brightness_range[EC_LED_COLOR_WHITE] =
+				MT6360_LED_BRIGHTNESS_MAX;
+	} else if (led_id == EC_LED_ID_POWER_LED) {
+		brightness_range[EC_LED_COLOR_WHITE] =
+				MT6360_LED_BRIGHTNESS_MAX;
+	}
+}
+
+int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
+{
+	if (led_id == EC_LED_ID_BATTERY_LED) {
+		if (brightness[EC_LED_COLOR_AMBER] != 0)
+			led_set_color_battery(EC_LED_COLOR_AMBER);
+		else if (brightness[EC_LED_COLOR_WHITE] != 0)
+			led_set_color_battery(EC_LED_COLOR_WHITE);
+		else
+			led_set_color_battery(LED_OFF);
+	} else if (led_id == EC_LED_ID_POWER_LED) {
+		if (brightness[EC_LED_COLOR_WHITE] != 0)
+			led_set_color_power(EC_LED_COLOR_WHITE);
+		else
+			led_set_color_power(LED_OFF);
+	}
+
+	return EC_SUCCESS;
+}
+
+__override enum led_states board_led_get_state(enum led_states desired_state)
+{
+	if (desired_state == STATE_BATTERY_ERROR) {
+		if (chipset_in_state(CHIPSET_STATE_ON))
+			return desired_state;
+		else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND))
+			return STATE_DISCHARGE_S3;
+		else
+			return STATE_DISCHARGE_S5;
+	}
+	return desired_state;
+}
diff --git a/board/krabby/usbc_config.c b/board/krabby/usbc_config.c
new file mode 100644
index 0000000000..2f35816abb
--- /dev/null
+++ b/board/krabby/usbc_config.c
@@ -0,0 +1,28 @@
+/* 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.
+ */
+
+/* Asurada board-specific USB-C configuration */
+
+#include "driver/ppc/syv682x.h"
+#include "driver/usb_mux/ps8743.h"
+#include "hooks.h"
+
+__override int syv682x_board_is_syv682c(int port)
+{
+	return board_get_version() > 2;
+}
+
+void board_usb_mux_init(void)
+{
+	if (board_get_sub_board() == SUB_BOARD_TYPEC) {
+		ps8743_tune_usb_eq(&usb_muxes[1],
+				   PS8743_USB_EQ_TX_12_8_DB,
+				   PS8743_USB_EQ_RX_12_8_DB);
+		ps8743_write(&usb_muxes[1],
+				   PS8743_REG_HS_DET_THRESHOLD,
+				   PS8743_USB_HS_THRESH_NEG_10);
+	}
+}
+DECLARE_HOOK(HOOK_INIT, board_usb_mux_init, HOOK_PRIO_INIT_I2C + 1);
diff --git a/board/krabby/vif_override.xml b/board/krabby/vif_override.xml
new file mode 100644
index 0000000000..32736caf64
--- /dev/null
+++ b/board/krabby/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.
+-->