burnet: Initial EC image

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

(Auto-Generated by create_initial_ec_image.sh version 1.0.3).

BUG=b:161768221
BRANCH=firmware-kukui-12573.B
TEST=make BOARD=burnet

Signed-off-by: Devin Lu <Devin.Lu@quantatw.com>
Change-Id: I1f0f15093fff32bc22e68dca02acc5a238a2296e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2319498
Reviewed-by: Ting Shen <phoenixshen@chromium.org>

7 files changed, 825 insertions, 0 deletions

diff --git a/board/burnet/battery.c b/board/burnet/battery.c
new file mode 100644
index 0000000000..1f9693e918
--- /dev/null
+++ b/board/burnet/battery.c
@@ -0,0 +1,75 @@
+/* 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 "battery.h"
+#include "battery_fuel_gauge.h"
+#include "gpio.h"
+
+const struct board_batt_params board_battery_info[] = {
+	/* Dynapack HIGHPOWER DAK124960-W110703HT Battery Information */
+	[BATTERY_DANAPACK_HIGHPOWER] = {
+		.fuel_gauge = {
+			.manuf_name = "333-2D-14-A",
+			.ship_mode = {
+				.reg_addr = 0x0,
+				.reg_data = { 0x0010, 0x0010 },
+			},
+			.fet = {
+				.mfgacc_support = 1,
+				.reg_addr = 0x0,
+				.reg_mask = 0x0006,
+				.disconnect_val = 0x0,
+			},
+		},
+		.batt_info = {
+			.voltage_max = 8700,		/* mV */
+			.voltage_normal = 7600,		/* mV */
+			.voltage_min = 6000,		/* mV */
+			.precharge_current = 256,	/* mA */
+			.start_charging_min_c = 0,
+			.start_charging_max_c = 45,
+			.charging_min_c = 0,
+			.charging_max_c = 45,
+			.discharging_min_c = -10,
+			.discharging_max_c = 60,
+		},
+	},
+	/* Dynapack CosMX DAK124960-W0P0707HT Battery Information */
+	[BATTERY_DANAPACK_COS] = {
+		.fuel_gauge = {
+			.manuf_name = "333-2C-14-A",
+			.ship_mode = {
+				.reg_addr = 0x0,
+				.reg_data = { 0x0010, 0x0010 },
+			},
+			.fet = {
+				.mfgacc_support = 1,
+				.reg_addr = 0x0,
+				.reg_mask = 0x0006,
+				.disconnect_val = 0x0,
+			},
+		},
+		.batt_info = {
+			.voltage_max = 8700,		/* mV */
+			.voltage_normal = 7600,		/* mV */
+			.voltage_min = 6000,		/* mV */
+			.precharge_current = 256,	/* mA */
+			.start_charging_min_c = 0,
+			.start_charging_max_c = 45,
+			.charging_min_c = 0,
+			.charging_max_c = 45,
+			.discharging_min_c = -10,
+			.discharging_max_c = 60,
+		},
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
+
+const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_DANAPACK_HIGHPOWER;
+
+enum battery_present battery_hw_present(void)
+{
+	return gpio_get_level(GPIO_EC_BATT_PRES_ODL) ? BP_NO : BP_YES;
+}
diff --git a/board/burnet/board.c b/board/burnet/board.c
new file mode 100644
index 0000000000..7a8b2989ae
--- /dev/null
+++ b/board/burnet/board.c
@@ -0,0 +1,312 @@
+/* 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 "adc_chip.h"
+#include "backlight.h"
+#include "button.h"
+#include "charge_manager.h"
+#include "charge_ramp.h"
+#include "charge_state.h"
+#include "charger.h"
+#include "chipset.h"
+#include "common.h"
+#include "console.h"
+#include "driver/accelgyro_bmi_common.h"
+#include "driver/battery/max17055.h"
+#include "driver/bc12/pi3usb9201.h"
+#include "driver/charger/isl923x.h"
+#include "driver/sync.h"
+#include "driver/tcpm/fusb302.h"
+#include "driver/usb_mux/it5205.h"
+#include "ec_commands.h"
+#include "extpower.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "host_command.h"
+#include "i2c.h"
+#include "i2c_bitbang.h"
+#include "it8801.h"
+#include "keyboard_scan.h"
+#include "lid_switch.h"
+#include "power.h"
+#include "power_button.h"
+#include "registers.h"
+#include "spi.h"
+#include "system.h"
+#include "tablet_mode.h"
+#include "task.h"
+#include "tcpm.h"
+#include "timer.h"
+#include "usb_charge.h"
+#include "usb_mux.h"
+#include "usb_pd_tcpm.h"
+#include "util.h"
+
+#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
+#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
+
+static void tcpc_alert_event(enum gpio_signal signal)
+{
+	schedule_deferred_pd_interrupt(0 /* port */);
+}
+
+#include "gpio_list.h"
+
+/******************************************************************************/
+/* ADC channels. Must be in the exactly same order as in enum adc_channel. */
+const struct adc_t adc_channels[] = {
+	[ADC_BOARD_ID] =  {"BOARD_ID",  3300, 4096, 0, STM32_AIN(10)},
+	[ADC_EC_SKU_ID] = {"EC_SKU_ID", 3300, 4096, 0, STM32_AIN(8)},
+	[ADC_BATT_ID] =   {"BATT_ID",   3300, 4096, 0, STM32_AIN(7)},
+};
+BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
+
+/******************************************************************************/
+/* I2C ports */
+const struct i2c_port_t i2c_ports[] = {
+	{"typec", 0, 400, GPIO_I2C1_SCL, GPIO_I2C1_SDA},
+	{"other", 1, 100, GPIO_I2C2_SCL, GPIO_I2C2_SDA},
+};
+const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
+
+const struct i2c_port_t i2c_bitbang_ports[] = {
+	{"battery", 2, 100, GPIO_I2C3_SCL, GPIO_I2C3_SDA, .drv = &bitbang_drv},
+};
+const unsigned int i2c_bitbang_ports_used = ARRAY_SIZE(i2c_bitbang_ports);
+
+#define BC12_I2C_ADDR PI3USB9201_I2C_ADDR_3
+
+/* power signal list.  Must match order of enum power_signal. */
+const struct power_signal_info power_signal_list[] = {
+	{GPIO_AP_IN_SLEEP_L,   POWER_SIGNAL_ACTIVE_LOW,  "AP_IN_S3_L"},
+	{GPIO_PMIC_EC_RESETB,  POWER_SIGNAL_ACTIVE_HIGH, "PMIC_PWR_GOOD"},
+};
+BUILD_ASSERT(ARRAY_SIZE(power_signal_list) == POWER_SIGNAL_COUNT);
+
+/* Keyboard scan setting */
+struct keyboard_scan_config keyscan_config = {
+	/*
+	 * TODO(b/133200075): Tune this once we have the final performance
+	 * out of the driver and the i2c bus.
+	 */
+	.output_settle_us = 35,
+	.debounce_down_us = 5 * MSEC,
+	.debounce_up_us = 40 * MSEC,
+	.scan_period_us = 10 * MSEC,
+	.min_post_scan_delay_us = 10 * MSEC,
+	.poll_timeout_us = 100 * MSEC,
+	.actual_key_mask = {
+		0x14, 0xff, 0xff, 0xff, 0xff, 0xf5, 0xff,
+		0xa4, 0xff, 0xfe, 0x55, 0xfa, 0xca  /* full set */
+	},
+};
+
+struct ioexpander_config_t ioex_config[CONFIG_IO_EXPANDER_PORT_COUNT] = {
+	[0] = {
+		.i2c_host_port = I2C_PORT_IO_EXPANDER_IT8801,
+		.i2c_slave_addr = IT8801_I2C_ADDR,
+		.drv = &it8801_ioexpander_drv,
+	},
+};
+
+/******************************************************************************/
+/* SPI devices */
+/* TODO: to be added once sensors land via CL:1714436 */
+const struct spi_device_t spi_devices[] = {
+};
+const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);
+
+const struct pi3usb9201_config_t pi3usb9201_bc12_chips[] = {
+	{
+		.i2c_port = I2C_PORT_BC12,
+		.i2c_addr_flags = PI3USB9201_I2C_ADDR_3_FLAGS,
+	},
+};
+
+/******************************************************************************/
+const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	{
+		.bus_type = EC_BUS_TYPE_I2C,
+		.i2c_info = {
+			.port = I2C_PORT_TCPC0,
+			.addr_flags = FUSB302_I2C_SLAVE_ADDR_FLAGS,
+		},
+		.drv = &fusb302_tcpm_drv,
+	},
+};
+
+static void board_hpd_status(const struct usb_mux *me,
+			     int hpd_lvl, int hpd_irq)
+{
+	/*
+	 * svdm_dp_attention() did most of the work, we only need to notify
+	 * host here.
+	 */
+	host_set_single_event(EC_HOST_EVENT_USB_MUX);
+}
+
+const struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_MAX_COUNT] = {
+	{
+		.usb_port = 0,
+		.i2c_port = I2C_PORT_USB_MUX,
+		.i2c_addr_flags = IT5205_I2C_ADDR1_FLAGS,
+		.driver = &it5205_usb_mux_driver,
+		.hpd_update = &board_hpd_status,
+	},
+};
+
+uint16_t tcpc_get_alert_status(void)
+{
+	uint16_t status = 0;
+
+	if (!gpio_get_level(GPIO_USB_C0_PD_INT_ODL))
+		status |= PD_STATUS_TCPC_ALERT_0;
+
+	return status;
+}
+
+static int force_discharge;
+
+int board_set_active_charge_port(int charge_port)
+{
+	CPRINTS("New chg p%d", charge_port);
+
+	/* ignore all request when discharge mode is on */
+	if (force_discharge && charge_port != CHARGE_PORT_NONE)
+		return EC_SUCCESS;
+
+	switch (charge_port) {
+	case CHARGE_PORT_USB_C:
+		/* Don't charge from a source port */
+		if (board_vbus_source_enabled(charge_port))
+			return -1;
+		break;
+	case CHARGE_PORT_NONE:
+		/*
+		 * To ensure the fuel gauge (max17055) is always powered
+		 * even when battery is disconnected, keep VBAT rail on but
+		 * set the charging current to minimum.
+		 */
+		charger_set_current(CHARGER_SOLO, 0);
+		break;
+	default:
+		panic("Invalid charge port\n");
+		break;
+	}
+
+	return EC_SUCCESS;
+}
+
+void board_set_charge_limit(int port, int supplier, int charge_ma,
+			    int max_ma, int charge_mv)
+{
+	charge_ma = (charge_ma * 95) / 100;
+	charge_set_input_current_limit(MAX(charge_ma,
+			       CONFIG_CHARGER_INPUT_CURRENT), charge_mv);
+}
+
+int board_discharge_on_ac(int enable)
+{
+	int ret, port;
+
+	if (enable) {
+		port = CHARGE_PORT_NONE;
+	} else {
+		/* restore the charge port state */
+		port = charge_manager_get_override();
+		if (port == OVERRIDE_OFF)
+			port = charge_manager_get_active_charge_port();
+	}
+
+	ret = charger_discharge_on_ac(enable);
+	if (ret)
+		return ret;
+	force_discharge = enable;
+
+	return board_set_active_charge_port(port);
+}
+
+int pd_snk_is_vbus_provided(int port)
+{
+	/* TODO(b:138352732): read IT8801 GPIO EN_USBC_CHARGE_L */
+	return EC_ERROR_UNIMPLEMENTED;
+}
+
+void bc12_interrupt(enum gpio_signal signal)
+{
+	task_set_event(TASK_ID_USB_CHG_P0, USB_CHG_EVENT_BC12, 0);
+}
+
+static void board_init(void)
+{
+	/* If the reset cause is external, pulse PMIC force reset. */
+	if (system_get_reset_flags() == EC_RESET_FLAG_RESET_PIN) {
+		gpio_set_level(GPIO_PMIC_FORCE_RESET_ODL, 0);
+		msleep(100);
+		gpio_set_level(GPIO_PMIC_FORCE_RESET_ODL, 1);
+	}
+
+	/* Enable TCPC alert interrupts */
+	gpio_enable_interrupt(GPIO_USB_C0_PD_INT_ODL);
+
+#ifdef SECTION_IS_RW
+	/* Enable interrupts from BMI160 sensor. */
+	gpio_enable_interrupt(GPIO_ACCEL_INT_ODL);
+#endif /* SECTION_IS_RW */
+
+	/* Enable interrupt from PMIC. */
+	gpio_enable_interrupt(GPIO_PMIC_EC_RESETB);
+
+	/* Enable BC12 interrupt */
+	gpio_enable_interrupt(GPIO_BC12_EC_INT_ODL);
+}
+DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
+
+/* Motion sensors */
+/* Mutexes */
+#ifdef SECTION_IS_RW
+/* TODO: to be added once sensors land via CL:1714436 */
+struct motion_sensor_t motion_sensors[] = {
+};
+const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors);
+
+#endif /* SECTION_IS_RW */
+
+/* Called on AP S5 -> S3 transition */
+static void board_chipset_startup(void)
+{
+	gpio_set_level(GPIO_EN_USBA_5V, 1);
+}
+DECLARE_HOOK(HOOK_CHIPSET_STARTUP, board_chipset_startup, HOOK_PRIO_DEFAULT);
+
+/* Called on AP S3 -> S5 transition */
+static void board_chipset_shutdown(void)
+{
+	gpio_set_level(GPIO_EN_USBA_5V, 0);
+}
+DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, board_chipset_shutdown, HOOK_PRIO_DEFAULT);
+
+int battery_get_vendor_param(uint32_t param, uint32_t *value)
+{
+	int rv;
+	uint8_t data[16] = {};
+
+	/* only allow reading 0x70~0x7F, 16 byte data */
+	if (param < 0x70 || param >= 0x80)
+		return EC_ERROR_ACCESS_DENIED;
+
+	rv = sb_read_string(0x70, data, sizeof(data));
+	if (rv)
+		return rv;
+
+	*value = data[param - 0x70];
+	return EC_SUCCESS;
+}
+
+int battery_set_vendor_param(uint32_t param, uint32_t value)
+{
+	return EC_ERROR_UNIMPLEMENTED;
+}
diff --git a/board/burnet/board.h b/board/burnet/board.h
new file mode 100644
index 0000000000..4eeb48a785
--- /dev/null
+++ b/board/burnet/board.h
@@ -0,0 +1,145 @@
+/* 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.
+ */
+
+/* Configuration for Kukui */
+
+#ifndef __CROS_EC_BOARD_H
+#define __CROS_EC_BOARD_H
+
+#define VARIANT_KUKUI_JACUZZI
+#define VARIANT_KUKUI_BATTERY_SMART
+#define VARIANT_KUKUI_CHARGER_ISL9238
+
+#ifndef SECTION_IS_RW
+#define VARIANT_KUKUI_NO_SENSORS
+#endif /* SECTION_IS_RW */
+
+#include "baseboard.h"
+
+#undef CONFIG_CHIPSET_POWER_SEQ_VERSION
+#define CONFIG_CHIPSET_POWER_SEQ_VERSION 1
+
+#define CONFIG_BATTERY_HW_PRESENT_CUSTOM
+#define CONFIG_BATTERY_VENDOR_PARAM
+
+#define CONFIG_CHARGER_PSYS
+
+#define CONFIG_BC12_DETECT_PI3USB9201
+
+#define CONFIG_EXTPOWER_GPIO
+#undef CONFIG_EXTPOWER_DEBOUNCE_MS
+#define CONFIG_EXTPOWER_DEBOUNCE_MS 200
+
+#define CONFIG_I2C_BITBANG
+#define I2C_BITBANG_PORT_COUNT 1
+#undef CONFIG_I2C_NACK_RETRY_COUNT
+#define CONFIG_I2C_NACK_RETRY_COUNT 10
+#define CONFIG_SMBUS_PEC
+
+#define CONFIG_USB_PD_TCPM_FUSB302
+#define CONFIG_USB_PD_DISCHARGE_GPIO
+#define CONFIG_USB_PD_TCPC_LOW_POWER
+
+#define CONFIG_USB_MUX_IT5205
+
+/* Motion Sensors */
+#ifdef SECTION_IS_RW
+#define CONFIG_MAG_BMI_BMM150
+#define CONFIG_ACCELGYRO_SEC_ADDR_FLAGS BMM150_ADDR0_FLAGS
+#define CONFIG_MAG_CALIBRATE
+#define CONFIG_ACCELGYRO_BMI160
+#define CONFIG_ACCEL_INTERRUPTS
+#define CONFIG_ACCELGYRO_BMI160_INT_EVENT \
+	TASK_EVENT_MOTION_SENSOR_INTERRUPT(LID_ACCEL)
+#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(CLEAR_ALS)
+
+#endif /* SECTION_IS_RW */
+
+/* I2C ports */
+#define I2C_PORT_BC12               0
+#define I2C_PORT_TCPC0              0
+#define I2C_PORT_USB_MUX            0
+#define I2C_PORT_BATTERY            2
+#define I2C_PORT_CHARGER            1
+#define I2C_PORT_IO_EXPANDER_IT8801 1
+#define I2C_PORT_VIRTUAL_BATTERY    I2C_PORT_BATTERY
+
+/* Enable Accel over SPI */
+#define CONFIG_SPI_ACCEL_PORT    0  /* The first SPI master port (SPI2) */
+
+#define CONFIG_KEYBOARD_PROTOCOL_MKBP
+#define CONFIG_MKBP_EVENT
+#define CONFIG_MKBP_USE_GPIO
+/* Define the MKBP events which are allowed to wakeup AP in S3. */
+#define CONFIG_MKBP_HOST_EVENT_WAKEUP_MASK \
+		(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN) |\
+		 EC_HOST_EVENT_MASK(EC_HOST_EVENT_POWER_BUTTON))
+
+#ifndef __ASSEMBLER__
+
+enum adc_channel {
+	/* Real ADC channels begin here */
+	ADC_BOARD_ID = 0,
+	ADC_EC_SKU_ID,
+	ADC_BATT_ID,
+	ADC_CH_COUNT
+};
+
+/* power signal definitions */
+enum power_signal {
+	AP_IN_S3_L,
+	PMIC_PWR_GOOD,
+
+	/* Number of signals */
+	POWER_SIGNAL_COUNT,
+};
+
+/* Motion sensors */
+enum sensor_id {
+	LID_ACCEL = 0,
+	LID_GYRO,
+	LID_MAG,
+	CLEAR_ALS,
+	RGB_ALS,
+	VSYNC,
+	SENSOR_COUNT,
+};
+
+enum charge_port {
+	CHARGE_PORT_USB_C,
+};
+
+enum battery_type {
+	BATTERY_DANAPACK_HIGHPOWER,
+	BATTERY_DANAPACK_COS,
+	BATTERY_TYPE_COUNT,
+};
+
+#include "gpio_signal.h"
+#include "registers.h"
+
+#ifdef SECTION_IS_RO
+/* Interrupt handler for emmc task */
+void emmc_cmd_interrupt(enum gpio_signal signal);
+#endif
+
+void bc12_interrupt(enum gpio_signal signal);
+void board_reset_pd_mcu(void);
+int board_get_version(void);
+int board_is_sourcing_vbus(int port);
+
+/* returns the i2c port number of charger */
+int board_get_charger_i2c(void);
+
+#endif /* !__ASSEMBLER__ */
+
+#endif /* __CROS_EC_BOARD_H */
diff --git a/board/burnet/build.mk b/board/burnet/build.mk
new file mode 100644
index 0000000000..a6e1c010d7
--- /dev/null
+++ b/board/burnet/build.mk
@@ -0,0 +1,15 @@
+# -*- makefile -*-
+# 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.
+#
+# Board specific files build
+#
+#
+# STmicro STM32F098VC
+CHIP:=stm32
+CHIP_FAMILY:=stm32f0
+CHIP_VARIANT:=stm32f09x
+BASEBOARD:=kukui
+
+board-y=battery.o board.o led.o
diff --git a/board/burnet/ec.tasklist b/board/burnet/ec.tasklist
new file mode 100644
index 0000000000..c1330b86f8
--- /dev/null
+++ b/board/burnet/ec.tasklist
@@ -0,0 +1,20 @@
+/* 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.
+ */
+
+/**
+ * See CONFIG_TASK_LIST in config.h for details.
+ */
+#define CONFIG_TASK_LIST \
+	TASK_ALWAYS(HOOKS, hook_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_ALWAYS(CHARGER, charger_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P0, usb_charger_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_NOTEST(CHIPSET, chipset_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS_RW(MOTIONSENSE, motion_sense_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_ALWAYS(HOSTCMD, host_command_task, NULL, 1024) \
+	TASK_ALWAYS(CONSOLE, console_task, NULL, VENTI_TASK_STACK_SIZE) \
+	TASK_NOTEST(KEYSCAN, keyboard_scan_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS(PD_C0, pd_task, NULL, 1280) \
+	TASK_ALWAYS(PD_INT_C0, pd_interrupt_handler_task, 0, 1024) \
+	TASK_ALWAYS_RO(EMMC, emmc_task, NULL, LARGER_TASK_STACK_SIZE)
diff --git a/board/burnet/gpio.inc b/board/burnet/gpio.inc
new file mode 100644
index 0000000000..2fe86f356b
--- /dev/null
+++ b/board/burnet/gpio.inc
@@ -0,0 +1,111 @@
+/* -*- mode:c -*-
+ *
+ * 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.
+ */
+
+/*
+ * Declare symbolic names for all the GPIOs that we care about.
+ * Note: Those with interrupt handlers must be declared first.
+ */
+
+/* Interrupts */
+GPIO_INT(USB_C0_PD_INT_ODL, PIN(B, 1), GPIO_INT_FALLING | GPIO_PULL_UP,
+         tcpc_alert_event)
+GPIO_INT(POWER_BUTTON_L,    PIN(A, 0),  GPIO_INT_BOTH | GPIO_PULL_UP,
+         power_button_interrupt) /* EC_PWR_BTN_ODL */
+GPIO_INT(AP_IN_SLEEP_L,     PIN(C, 12), GPIO_INT_BOTH | GPIO_PULL_DOWN,
+         power_signal_interrupt)
+GPIO_INT(PMIC_EC_RESETB,    PIN(B, 7),  GPIO_INT_BOTH | GPIO_PULL_DOWN,
+         power_signal_interrupt)
+GPIO_INT(WARM_RESET_REQ,    PIN(A, 3),  GPIO_INT_RISING | GPIO_PULL_DOWN,
+         chipset_reset_request_interrupt)
+GPIO_INT_RW(ACCEL_INT_ODL,  PIN(A, 4), GPIO_INT_FALLING | GPIO_SEL_1P8V | GPIO_PULL_UP,
+         bmi160_interrupt)
+GPIO_INT_RO(EMMC_CMD,       PIN(B, 15), GPIO_INT_FALLING,
+         emmc_cmd_interrupt)
+GPIO_INT(SPI1_NSS,          PIN(A, 15), GPIO_INT_BOTH | GPIO_PULL_UP,
+         spi_event) /* SPI_AP_EC_CS_L */
+GPIO_INT(LID_OPEN,          PIN(C, 5),  GPIO_INT_BOTH,
+         lid_interrupt)
+GPIO_INT(AC_PRESENT,        PIN(A, 6),  GPIO_INT_BOTH,
+         extpower_interrupt) /* ACOK_OD */
+GPIO_INT(BC12_EC_INT_ODL,   PIN(C, 9),  GPIO_INT_FALLING,
+         bc12_interrupt)
+GPIO_INT(IT8801_SMB_INT,    PIN(A, 8),  GPIO_INT_FALLING | GPIO_PULL_UP,
+         io_expander_it8801_interrupt) /* KB_INT_ODL */
+GPIO_INT(AP_EC_WATCHDOG_L,  PIN(D, 2),  GPIO_INT_FALLING,
+         chipset_watchdog_interrupt)
+GPIO_INT(TABLET_MODE_L,     PIN(B, 11), GPIO_INT_BOTH,
+         gmr_tablet_switch_isr)
+
+/* Unimplemented interrupts */
+GPIO(ALS_RGB_INT_ODL,      PIN(C, 10), GPIO_INPUT)
+
+/* Reset pins */
+GPIO(AP_SYS_RST_L,         PIN(C, 11), GPIO_OUT_LOW)
+GPIO(PMIC_WATCHDOG_L,      PIN(A, 2),  GPIO_OUT_LOW)
+GPIO(PMIC_EN_ODL,          PIN(F, 0),  GPIO_ODR_HIGH)
+
+/*
+ * I2C pins should be configured as inputs until I2C module is
+ * initialized. This will avoid driving the lines unintentionally.
+ */
+GPIO(I2C1_SCL,             PIN(B, 8),  GPIO_INPUT)
+GPIO(I2C1_SDA,             PIN(B, 9),  GPIO_INPUT)
+GPIO(I2C2_SCL,             PIN(A, 11), GPIO_INPUT)
+GPIO(I2C2_SDA,             PIN(A, 12), GPIO_INPUT)
+GPIO(I2C3_SCL,             PIN(A, 5),  GPIO_ODR_HIGH)
+GPIO(I2C3_SDA,             PIN(C, 4),  GPIO_ODR_HIGH)
+
+/* Analog pins */
+GPIO(BOARD_ID,             PIN(C, 0),  GPIO_ANALOG)
+GPIO(EC_SKU_ID,            PIN(B, 0),  GPIO_ANALOG)
+
+/* Other input pins */
+GPIO(WP_L,                 PIN(C, 8),  GPIO_INPUT) /* EC_FLASH_WP_ODL */
+GPIO(BOOT0,                PIN(F, 11), GPIO_INPUT)
+GPIO(CCD_MODE_ODL,         PIN(A, 1),  GPIO_INPUT)
+
+/* Other output pins */
+GPIO(EC_BATT_PRES_ODL,     PIN(A, 7),  GPIO_INPUT)
+GPIO(EC_BL_EN_OD,          PIN(A, 13), GPIO_ODR_HIGH)
+GPIO(EN_USBA_5V,           PIN(C, 14), GPIO_OUT_LOW)
+GPIO(EC_SENSOR_SPI_MISO,   PIN(C, 2),  GPIO_INPUT)
+GPIO(EC_SENSOR_SPI_MOSI,   PIN(C, 3),  GPIO_OUT_LOW)
+GPIO(EC_SENSOR_SPI_NSS,    PIN(B, 12), GPIO_OUT_LOW)
+GPIO(EC_SENSOR_SPI_CK,     PIN(B, 10), GPIO_OUT_HIGH)
+GPIO(ENTERING_RW,          PIN(C, 6),  GPIO_ODR_HIGH) /* EC_ENTERING_RW_ODL */
+GPIO(EC_INT_L,             PIN(C, 7),  GPIO_ODR_HIGH) /* EC_AP_INT_ODL */
+GPIO(EC_BOARD_ID_EN_L,     PIN(C, 15), GPIO_ODR_HIGH) /* EC_BOARD_ID_EN_ODL */
+GPIO(USB_C0_HPD_OD,        PIN(F, 1),  GPIO_ODR_LOW)
+GPIO(BOOTBLOCK_EN_L,       PIN(C, 1),  GPIO_ODR_HIGH)
+GPIO(EN_PP1800_S5_L,       PIN(A, 14), GPIO_OUT_LOW)
+GPIO(USB_C0_DISCHARGE,     PIN(B, 6),  GPIO_OUT_LOW)
+
+IOEX(BAT_LED_AMBER_L,      EXPIN(0, 1, 2), GPIO_OUT_HIGH)
+IOEX(BAT_LED_WHITE_L,      EXPIN(0, 1, 4), GPIO_OUT_HIGH)
+
+/*
+ * TODO(b:138352732): On IT88801 expander, To be readded once IT8801 driver and
+ * gpio expander framework has landed.
+ */
+UNIMPLEMENTED(EN_PP5000_USBC)
+UNIMPLEMENTED(PMIC_FORCE_RESET_ODL)
+UNIMPLEMENTED(EN_USBC_CHARGE_L)
+
+/* USART1: PA9/PA10 */
+ALTERNATE(PIN_MASK(A, 0x0600), 1, MODULE_UART,       0)
+/* I2C MASTER: PB8/9 */
+ALTERNATE(PIN_MASK(B, 0x0300), 1, MODULE_I2C,        GPIO_ODR_HIGH )
+/* I2C MASTER: PA11/12 */
+ALTERNATE(PIN_MASK(A, 0x1800), 5, MODULE_I2C,        GPIO_ODR_HIGH )
+/* SPI SLAVE: PB3/4/5 */
+ALTERNATE(PIN_MASK(B, 0x0038), 0, MODULE_SPI,        0)
+/* SPI SLAVE CS: PA15 */
+ALTERNATE(PIN_MASK(A, 0x8000), 0, MODULE_SPI,        0)
+#ifdef SECTION_IS_RO
+/* SPI SLAVE: PB13/14/15 */
+ALTERNATE(PIN_MASK(B, 0xE000), 0, MODULE_SPI_FLASH,  0)
+#endif
diff --git a/board/burnet/led.c b/board/burnet/led.c
new file mode 100644
index 0000000000..5b65d7b948
--- /dev/null
+++ b/board/burnet/led.c
@@ -0,0 +1,147 @@
+/* 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.
+ *
+ * Power and battery LED control for Kappa
+ */
+
+#include "charge_state.h"
+#include "extpower.h"
+#include "hooks.h"
+#include "ioexpander.h"
+#include "led_common.h"
+
+#define BAT_LED_ON 0
+#define BAT_LED_OFF 1
+
+const enum ec_led_id supported_led_ids[] = {EC_LED_ID_BATTERY_LED};
+
+const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
+
+enum led_color {
+	LED_OFF = 0,
+	LED_AMBER,
+	LED_WHITE,
+	LED_COLOR_COUNT  /* Number of colors, not a color itself */
+};
+
+static int led_set_color_battery(enum led_color color)
+{
+	switch (color) {
+	case LED_OFF:
+		ioex_set_level(IOEX_BAT_LED_WHITE_L, BAT_LED_OFF);
+		ioex_set_level(IOEX_BAT_LED_AMBER_L, BAT_LED_OFF);
+		break;
+	case LED_WHITE:
+		ioex_set_level(IOEX_BAT_LED_WHITE_L, BAT_LED_ON);
+		ioex_set_level(IOEX_BAT_LED_AMBER_L, BAT_LED_OFF);
+		break;
+	case LED_AMBER:
+		ioex_set_level(IOEX_BAT_LED_WHITE_L, BAT_LED_OFF);
+		ioex_set_level(IOEX_BAT_LED_AMBER_L, BAT_LED_ON);
+		break;
+	default:
+		return EC_ERROR_UNKNOWN;
+	}
+	return EC_SUCCESS;
+}
+
+void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
+{
+	brightness_range[EC_LED_COLOR_WHITE] = 1;
+	brightness_range[EC_LED_COLOR_AMBER] = 1;
+}
+
+static int led_set_color(enum ec_led_id led_id, enum led_color color)
+{
+	int rv;
+
+	switch (led_id) {
+	case EC_LED_ID_BATTERY_LED:
+		rv = led_set_color_battery(color);
+		break;
+	default:
+		return EC_ERROR_UNKNOWN;
+	}
+	return rv;
+}
+
+int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
+{
+	if (brightness[EC_LED_COLOR_WHITE] != 0)
+		led_set_color(led_id, LED_WHITE);
+	else if (brightness[EC_LED_COLOR_AMBER] != 0)
+		led_set_color(led_id, LED_AMBER);
+	else
+		led_set_color(led_id, LED_OFF);
+
+	return EC_SUCCESS;
+}
+
+static void led_set_battery(void)
+{
+	static int battery_ticks;
+	static int power_ticks;
+	uint32_t chflags = charge_get_flags();
+
+	battery_ticks++;
+
+	/* override battery led for system suspend */
+	if (chipset_in_state(CHIPSET_STATE_SUSPEND |
+			     CHIPSET_STATE_STANDBY) &&
+	    charge_get_state() != PWR_STATE_CHARGE) {
+		led_set_color_battery(power_ticks++ & 0x2 ?
+				      LED_WHITE : LED_OFF);
+		return;
+	}
+
+	power_ticks = 0;
+
+	switch (charge_get_state()) {
+	case PWR_STATE_CHARGE:
+		led_set_color_battery(LED_AMBER);
+		break;
+	case PWR_STATE_DISCHARGE_FULL:
+		if (extpower_is_present()) {
+			led_set_color_battery(LED_WHITE);
+			break;
+		}
+		/* Intentional fall-through */
+	case PWR_STATE_DISCHARGE:
+		/*
+		 * Blink white light (1 sec on, 1 sec off)
+		 * when battery capacity is less than 10%
+		 */
+		if (charge_get_percent() < 10)
+			led_set_color_battery(
+				(battery_ticks & 0x2) ? LED_WHITE : LED_OFF);
+		else
+			led_set_color_battery(LED_OFF);
+		break;
+	case PWR_STATE_ERROR:
+		led_set_color_battery(
+			(battery_ticks % 0x2) ? LED_WHITE : LED_OFF);
+		break;
+	case PWR_STATE_CHARGE_NEAR_FULL:
+		led_set_color_battery(LED_WHITE);
+		break;
+	case PWR_STATE_IDLE: /* External power connected in IDLE */
+		if (chflags & CHARGE_FLAG_FORCE_IDLE)
+			led_set_color_battery(
+				(battery_ticks & 0x2) ? LED_AMBER : LED_OFF);
+		else
+			led_set_color_battery(LED_WHITE);
+		break;
+	default:
+		/* Other states don't alter LED behavior */
+		break;
+	}
+}
+
+/* Called by hook task every TICK */
+static void led_tick(void)
+{
+	if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
+		led_set_battery();
+}
+DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);