baseboard/asurada: refactor to support baseboard build

guidelines:
1. sensors are in the board, since this may changes most of the time
2. PPC/Charger/BC12/TCPC/PD are in the baseboard, this is unlikely
   changing
3. sub-board detection is in the baseboard
4. power signals, power sequence are in the baseboard
5. ADC/PWM this might change, but we keep them in the baseboard for now
6. it5205_sbu is not currently used for now, move it to baseboard
7. battery, led are kept in the board

BUG=b:178439840
TEST=boot hayato to OS
BRANCH=none

Change-Id: I21bf5d1f7901a10c3538ad5646362f2b402652af
Signed-off-by: Eric Yilun Lin <yllin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2675328
Reviewed-by: Ting Shen <phoenixshen@chromium.org>

7 files changed, 6 insertions, 1171 deletions

diff --git a/board/asurada/board.c b/board/asurada/board.c
index 9459169b6c..f5c249ff97 100644
--- a/board/asurada/board.c
+++ b/board/asurada/board.c
@@ -6,7 +6,6 @@
 
 #include "adc.h"
 #include "adc_chip.h"
-#include "board/asurada/it5205_sbu.h"
 #include "button.h"
 #include "charge_manager.h"
 #include "charge_state_v2.h"
@@ -52,584 +51,15 @@
 #define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
 #define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
 
-static void bc12_interrupt(enum gpio_signal signal);
-static void ppc_interrupt(enum gpio_signal signal);
-static void x_ec_interrupt(enum gpio_signal signal);
-
-#include "gpio_list.h"
-
-const struct charger_config_t chg_chips[] = {
-	{
-		.i2c_port = I2C_PORT_CHARGER,
-		.i2c_addr_flags = ISL923X_ADDR_FLAGS,
-		.drv = &isl923x_drv,
-	},
-};
-
-/*
- * 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);
-
-/* 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);
-
-__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)
-		return;
-
-	isl9238c_hibernate(CHARGER_SOLO);
-
-	gpio_set_level(GPIO_EN_SLP_Z, 1);
-
-	/* should not reach here */
-	__builtin_unreachable();
-}
-
-/* power signal list.  Must match order of enum power_signal. */
-const struct power_signal_info power_signal_list[] = {
-	{GPIO_PMIC_EC_PWRGD, POWER_SIGNAL_ACTIVE_HIGH, "PMIC_PWR_GOOD"},
-	{GPIO_AP_IN_SLEEP_L, POWER_SIGNAL_ACTIVE_LOW, "AP_IN_S3_L"},
-	{GPIO_AP_EC_WATCHDOG_L, POWER_SIGNAL_ACTIVE_LOW, "AP_WDT_ASSERTED"},
-};
-BUILD_ASSERT(ARRAY_SIZE(power_signal_list) == POWER_SIGNAL_COUNT);
-
-/* Detect subboard */
-static enum board_sub_board board_get_sub_board(void);
-
 /* Initialize board. */
 static void board_init(void)
 {
-	gpio_enable_interrupt(GPIO_AC_PRESENT);
-
-	gpio_enable_interrupt(GPIO_USB_C0_BC12_INT_ODL);
-
 	/* 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);
 
-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);
-
-/* 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", 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},
-	{"CHARGER_PMON", ADC_MAX_MVOLT, ADC_READ_MAX + 1, 0, CHIP_ADC_CH6},
-};
-BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
-
-/* BC12 */
-const struct mt6360_config_t mt6360_config = {
-	.i2c_port = 0,
-	.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 = 4,
-		.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 },
-};
-
-static 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);
-
-/*
- * 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);
-}
-
-/* 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);
-
-static void ppc_interrupt(enum gpio_signal signal)
-{
-	if (signal == GPIO_USB_C0_PPC_INT_ODL)
-		/* C0: PPC interrupt */
-		syv682x_interrupt(0);
-}
-
-int debounced_hpd;
-
-/**
- * Handle PS185 HPD changing state.
- */
-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 */
-static 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;
-}
-
-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 = &it83xx_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 = &it83xx_tcpm_drv,
-		/* Alert is active-low, push-pull */
-		.flags = 0,
-	},
-};
-
-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];
-}
-
-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)
-	 */
-}
-
-/* USB-A */
-const int usb_port_enable[] = {
-	GPIO_EN_PP5000_USB_A0_VBUS,
-};
-BUILD_ASSERT(ARRAY_SIZE(usb_port_enable) == USB_PORT_COUNT);
-
-/* USB Mux */
-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 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,
-	},
-	{
-		.usb_port = 1,
-		.i2c_port = I2C_PORT_USB_MUX1,
-		.i2c_addr_flags = PS8743_I2C_ADDR0_FLAG,
-		.driver = &ps8743_usb_mux_driver,
-		.board_set = &board_ps8743_mux_set,
-	},
-};
-
-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);
-}
-DECLARE_HOOK(HOOK_INIT, board_usb_mux_init, HOOK_PRIO_INIT_I2C + 1);
-
-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)) {
-		CPRINTF("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;
-}
-
-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.
-	 */
-}
-
-/* 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);
-
-/* Sub-board */
-
-static 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);
-
-__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;
-}
-
-/* Lid */
-#ifndef TEST_BUILD
-/* This callback disables keyboard when convertibles are fully open */
-void lid_angle_peripheral_enable(int enable)
-{
-	int chipset_in_s0 = chipset_in_state(CHIPSET_STATE_ON);
-
-	if (enable) {
-		keyboard_scan_enable(1, KB_SCAN_DISABLE_LID_ANGLE);
-	} else {
-		/*
-		 * Ensure that the chipset is off before disabling the keyboard.
-		 * When the chipset is on, the EC keeps the keyboard enabled and
-		 * the AP decides whether to ignore input devices or not.
-		 */
-		if (!chipset_in_s0)
-			keyboard_scan_enable(0, KB_SCAN_DISABLE_LID_ANGLE);
-	}
-}
-#endif
-
-/* 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);
-}
-
 /* Sensor */
 static struct mutex g_base_mutex;
 static struct mutex g_lid_mutex;
diff --git a/board/asurada/board.h b/board/asurada/board.h
index b0af44d571..b7ad4341fb 100644
--- a/board/asurada/board.h
+++ b/board/asurada/board.h
@@ -7,96 +7,26 @@
 #ifndef __CROS_EC_BOARD_H
 #define __CROS_EC_BOARD_H
 
+#include "baseboard.h"
+
 /* Chipset config */
-#define CONFIG_BOARD_RESET_AFTER_POWER_ON
 #define CONFIG_BRINGUP
-#define CONFIG_CHIPSET_MT8192
-#define CONFIG_CMD_AP_RESET_LOG
-#define CONFIG_CMD_POWERINDEBUG
-#define CONFIG_HIBERNATE_WAKE_PINS_DYNAMIC
-#define CONFIG_POWER_COMMON
 
 /* Optional features */
 #define CONFIG_SYSTEM_UNLOCKED
 #define CONFIG_LTO
-#define CONFIG_BOARD_VERSION_CUSTOM
-#define CONFIG_EXTPOWER_GPIO
-/*
- * 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
 
 /*
  * 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
-#define CONFIG_LOW_POWER_IDLE
-#define CONFIG_LOW_POWER_S0
-#define CONFIG_POWER_BUTTON
-#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
 /* TODO(b/159583342): remove after rev0 deprecated */
 #define CONFIG_MT6360_BC12_GPIO
-#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_CHARGER
-#define CONFIG_CHARGER_DISCHARGE_ON_AC
-#define CONFIG_CHARGER_INPUT_CURRENT 512
-#define CONFIG_CHARGER_ISL9238C
-#define CONFIG_CHARGER_MAINTAIN_VBAT
-#define CONFIG_CHARGER_SENSE_RESISTOR_AC 20 /* BOARD_RS1 */
-#define CONFIG_CHARGER_SENSE_RESISTOR 10 /* BOARD_RS2 */
-#define CONFIG_CHARGER_OTG
-#define CONFIG_CHARGER_PSYS
-#define CONFIG_CHARGER_PSYS_READ
-#define CONFIG_CHARGE_RAMP_HW
-#define CONFIG_CHARGE_MANAGER
-#define CONFIG_CMD_CHARGER_ADC_AMON_BMON
-
-/* Chipset */
-#define CONFIG_HOST_COMMAND_STATUS
-
-/* 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_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
 #ifdef BOARD_HAYATO
 #define CONFIG_LED_POWER_LED
 #define CONFIG_LED_ONOFF_STATES
@@ -104,48 +34,7 @@
 #endif
 
 /* PD / USB-C / PPC */
-#define CONFIG_CMD_PPC_DUMP
-#define CONFIG_HOSTCMD_PD_CONTROL
-#define CONFIG_USBC_PPC
-#define CONFIG_USBC_PPC_DEDICATED_INT
-#define CONFIG_USBC_PPC_POLARITY
-#define CONFIG_USBC_PPC_SYV682X
-#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_DEBUG_LEVEL 3
-#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_REV30
-#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_TCPC_LOW_POWER
-#define CONFIG_USB_PD_TCPMV2
-#define CONFIG_USB_PD_TCPM_ITE_ON_CHIP
-#define CONFIG_USB_PD_TCPM_TCPCI
-#define CONFIG_USB_PD_TRY_SRC
-#define CONFIG_USB_PD_VBUS_DETECT_PPC
-#define CONFIG_USB_PID 0x5566  /* TODO: update PID */
-#define CONFIG_USB_POWER_DELIVERY
-#define CONFIG_IT83XX_TUNE_CC_PHY
-
-#define PD_MAX_CURRENT_MA 3000
-#define PD_MAX_VOLTAGE_MV 20000
-#define PD_OPERATING_POWER_MW 15000
-#define PD_MAX_POWER_MW 60000
-#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
@@ -158,10 +47,6 @@
 #define CONFIG_TABLET_MODE_SWITCH
 #define GMR_TABLET_MODE_GPIO_L GPIO_TABLET_MODE_L
 
-#define CONFIG_ACCEL_FIFO
-#define CONFIG_ACCEL_FIFO_SIZE 256
-#define CONFIG_ACCEL_FIFO_THRES (CONFIG_ACCEL_FIFO_SIZE / 3)
-#define CONFIG_ACCEL_INTERRUPTS
 #define CONFIG_ACCELGYRO_BMI160 /* Base accel */
 #define CONFIG_ACCELGYRO_BMI160_INT_EVENT \
 	TASK_EVENT_MOTION_SENSOR_INTERRUPT(BASE_ACCEL)
@@ -176,9 +61,6 @@
 #define CONFIG_LID_ANGLE_SENSOR_LID LID_ACCEL
 #define CONFIG_LID_ANGLE_UPDATE
 
-#define CONFIG_CMD_ACCEL_INFO
-#define CONFIG_CMD_ACCELS
-
 #ifdef BOARD_ASURADA_REV0
 #define CONFIG_ALS
 #define ALS_COUNT 1
@@ -196,43 +78,9 @@
 /* SPI / Host Command */
 #undef CONFIG_HOSTCMD_DEBUG_MODE
 #define CONFIG_HOSTCMD_DEBUG_MODE HCDEBUG_OFF
-#define CONFIG_SPI
-#define CONFIG_SUPPRESSED_HOST_COMMANDS \
-	EC_CMD_CONSOLE_SNAPSHOT, EC_CMD_CONSOLE_READ, EC_CMD_MOTION_SENSE_CMD, \
-	EC_CMD_PD_GET_LOG_ENTRY
-
-/* MKBP */
-#define CONFIG_MKBP_EVENT
-
-#define CONFIG_KEYBOARD_PROTOCOL_MKBP
-#define CONFIG_MKBP_USE_GPIO
-
-/* 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_MODE_CHANGE) | /* for DP */ \
-	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_POWER_BUTTON))
-
-/* UART */
-#undef CONFIG_UART_TX_BUF_SIZE
-#define CONFIG_UART_TX_BUF_SIZE 4096
 
 /* USB-A */
-#define CONFIG_USB_PORT_POWER_DUMB
-#define USB_PORT_COUNT 1
-
-/* 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
-
-/* Voltage regulator control */
-#define CONFIG_HOSTCMD_REGULATOR
+#define USBA_PORT_COUNT 1
 
 #ifndef __ASSEMBLER__
 
@@ -244,39 +92,6 @@ enum battery_type {
 	BATTERY_TYPE_COUNT,
 };
 
-enum pwm_channel {
-	PWM_CH_LED1,
-	PWM_CH_LED2,
-	PWM_CH_LED3,
-	PWM_CH_COUNT,
-};
-
-enum adc_channel {
-	ADC_VBUS,                /* ADC 0 */
-	ADC_BOARD_ID_0,          /* ADC 1 */
-	ADC_BOARD_ID_1,          /* ADC 2 */
-	ADC_CHARGER_AMON_R,      /* ADC 3 */
-	ADC_CHARGER_PMON,        /* ADC 6 */
-
-	/* Number of ADC channels */
-	ADC_CH_COUNT,
-};
-
-enum power_signal {
-	PMIC_PWR_GOOD,
-	AP_IN_S3_L,
-	AP_WDT_ASSERTED,
-	POWER_SIGNAL_COUNT,
-};
-
-enum board_sub_board {
-	SUB_BOARD_NONE = -1,
-	SUB_BOARD_TYPEC,
-	SUB_BOARD_HDMI,
-
-	SUB_BOARD_COUNT,
-};
-
 enum sensor_id {
 	BASE_ACCEL = 0,
 	BASE_GYRO,
@@ -288,8 +103,6 @@ enum sensor_id {
 	SENSOR_COUNT,
 };
 
-void board_reset_pd_mcu(void);
-int board_get_version(void);
 int board_accel_force_mode_mask(void);
 
 #endif /* !__ASSEMBLER__ */
diff --git a/board/asurada/board_id.c b/board/asurada/board_id.c
deleted file mode 100644
index a2306c2211..0000000000
--- a/board/asurada/board_id.c
+++ /dev/null
@@ -1,107 +0,0 @@
-/* Copyright 2020 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("WARNING: failed to read ADC_BOARD_ID_0");
-		ccprints("Assuming board id = 0");
-
-		version = 0;
-	}
-}
-DECLARE_HOOK(HOOK_INIT, board_version_init, HOOK_PRIO_INIT_ADC + 1);
-
-int board_get_version(void)
-{
-	return version;
-}
diff --git a/board/asurada/build.mk b/board/asurada/build.mk
index 9adf6b09a5..8ecba2f691 100644
--- a/board/asurada/build.mk
+++ b/board/asurada/build.mk
@@ -8,8 +8,9 @@
 # the IC is ITE IT8xxx2
 CHIP:=it83xx
 CHIP_FAMILY:=it8xxx2
-CHIP_VARIANT:=it81202ax_1024
+CHIP_VARIANT:=it81202bx_1024
+BASEBOARD:=asurada
 
 board-$(BOARD_HAYATO)=led_hayato.o
 board-$(BOARD_ASURADA)=led.o
-board-y+=battery.o board.o board_id.o usb_pd_policy.o
+board-y+=battery.o board.o
diff --git a/board/asurada/it5205_sbu.c b/board/asurada/it5205_sbu.c
deleted file mode 100644
index 9ee59a5cc3..0000000000
--- a/board/asurada/it5205_sbu.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/* Copyright 2020 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/board/asurada/it5205_sbu.h b/board/asurada/it5205_sbu.h
deleted file mode 100644
index 8dc59520dd..0000000000
--- a/board/asurada/it5205_sbu.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* Copyright 2020 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/board/asurada/usb_pd_policy.c b/board/asurada/usb_pd_policy.c
deleted file mode 100644
index 9e90eb95a3..0000000000
--- a/board/asurada/usb_pd_policy.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/* Copyright 2020 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 "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)
-
-/* The port that the aux channel is on. */
-static enum {
-	AUX_PORT_NONE = -1,
-	AUX_PORT_C0 = 0,
-	AUX_PORT_C1HDMI = 1,
-} aux_port = AUX_PORT_NONE;
-
-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);
-}
-
-static void aux_switch_port(int port)
-{
-	if (port != AUX_PORT_NONE)
-		gpio_set_level_verbose(CC_USBPD, GPIO_DP_AUX_PATH_SEL, port);
-	aux_port = port;
-}
-
-static void aux_display_disconnected(int port)
-{
-	/* Gets the other port. C0 -> C1, C1 -> C0. */
-	int other_port = !port;
-
-	/* If the current port is not the aux port, nothing needs to be done. */
-	if (aux_port != port)
-		return;
-
-	/* If the other port is connected to a external display, switch aux. */
-	if (dp_status[other_port] & DP_FLAGS_DP_ON)
-		aux_switch_port(other_port);
-	else
-		aux_switch_port(AUX_PORT_NONE);
-}
-
-__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 */
-
-	dp_status[port] = payload[1];
-
-	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);
-	}
-
-	/*
-	 * Asurada can only output to 1 display port at a time.
-	 * This implements FCFS policy by changing the aux channel. If a
-	 * display is connected to the either port (says A), and the port A
-	 * will be served until the display is disconnected from port A.
-	 * It won't output to the other display which connects to port B.
-	 */
-	if (lvl && aux_port == AUX_PORT_NONE)
-		/*
-		 * A display is connected, and no display was plugged on either
-		 * port.
-		 */
-		aux_switch_port(port);
-	else if (!lvl)
-		aux_display_disconnected(port);
-
-
-	/* 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 */
-
-	usb_mux_hpd_update(port, lvl, irq);
-
-#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, 0, 0);
-
-	aux_display_disconnected(port);
-
-#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)
-{
-	return ppc_is_vbus_present(port);
-}
-
-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);
-}
-