diff --git a/board/zoombini/board.c b/board/zoombini/board.c
index a2e0fbebc4..71055e0e48 100644
--- a/board/zoombini/board.c
+++ b/board/zoombini/board.c
@@ -28,6 +28,7 @@
 #include "pwm.h"
 #include "pwm_chip.h"
 #include "registers.h"
+#include "system.h"
 #include "switch.h"
 #include "tcpci.h"
 #include "usb_mux.h"
@@ -172,6 +173,30 @@ static void board_chipset_shutdown(void)
 }
 DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, board_chipset_shutdown, HOOK_PRIO_DEFAULT);
 
+int board_get_ramp_current_limit(int supplier, int sup_curr)
+{
+	/* Use the current limit that was decided by the BQ24392 driver. */
+	if (supplier == CHARGE_SUPPLIER_OTHER)
+		return sup_curr;
+	else
+		return 500;
+}
+
+int board_is_ramp_allowed(int supplier)
+{
+	/* Don't allow ramping in RO when write protected. */
+	if (system_get_image_copy() != SYSTEM_IMAGE_RW
+	    && system_is_locked())
+		return 0;
+
+	/*
+	 * Due to the limitations in the application of the BQ24392, we
+	 * don't quite know exactly what we're plugged into.  Therefore,
+	 * the supplier type will be CHARGE_SUPPLIER_OTHER.
+	 */
+	return supplier == CHARGE_SUPPLIER_OTHER;
+}
+
 void board_reset_pd_mcu(void)
 {
 	/* GPIO_USB_PD_RST_L resets all the TCPCs. */
diff --git a/board/zoombini/board.h b/board/zoombini/board.h
index d902a2ab0b..219f1111ce 100644
--- a/board/zoombini/board.h
+++ b/board/zoombini/board.h
@@ -34,6 +34,7 @@
 
 #define CONFIG_BOARD_VERSION
 
+#define CONFIG_BC12_DETECT_BQ24392
 #define CONFIG_CHARGER
 #define CONFIG_CHARGER_V2
 #define CONFIG_CHARGE_MANAGER
@@ -42,10 +43,8 @@
 #define CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON 1
 #define CONFIG_CHARGER_SENSE_RESISTOR 10
 #define CONFIG_CHARGER_SENSE_RESISTOR_AC 20
-/* TODO(aaboagye): add when BC 1.2 stuff ready. */
-#if 0
+#define CONFIG_CHARGE_RAMP_HW
 #define CONFIG_USB_CHARGER
-#endif /* 0 */
 
 #define CONFIG_CHIPSET_CANNONLAKE
 #define CONFIG_CHIPSET_RESET_HOOK
diff --git a/board/zoombini/ec.tasklist b/board/zoombini/ec.tasklist
index 4aae42a072..dec8342612 100644
--- a/board/zoombini/ec.tasklist
+++ b/board/zoombini/ec.tasklist
@@ -22,6 +22,9 @@
 
 #define CONFIG_TASK_LIST \
 	TASK_ALWAYS(HOOKS, hook_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P0, usb_charger_task, 0, TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P1, usb_charger_task, 1, TASK_STACK_SIZE) \
+	TASK_ALWAYS(USB_CHG_P2, usb_charger_task, 2, TASK_STACK_SIZE) \
 	TASK_ALWAYS(CHARGER, charger_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_NOTEST(CHIPSET, chipset_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_NOTEST(KEYPROTO, keyboard_protocol_task, NULL, TASK_STACK_SIZE) \
diff --git a/board/zoombini/gpio.inc b/board/zoombini/gpio.inc
index 119aa7953b..616d01b64b 100644
--- a/board/zoombini/gpio.inc
+++ b/board/zoombini/gpio.inc
@@ -71,6 +71,13 @@ GPIO(USB_C0_CHARGE_EN_L, PIN(0, 3), GPIO_OUT_LOW)
 GPIO(USB_C1_CHARGE_EN_L, PIN(0, 4), GPIO_OUT_LOW)
 GPIO(USB_C2_CHARGE_EN_L, PIN(4, 0), GPIO_OUT_LOW)
 
+GPIO(USB_C0_BC12_VBUS_ON, PIN(8, 2), GPIO_ODR_LOW)
+GPIO(USB_C1_BC12_VBUS_ON, PIN(B, 1), GPIO_ODR_LOW)
+GPIO(USB_C2_BC12_VBUS_ON, PIN(E, 0), GPIO_ODR_LOW)
+GPIO(USB_C0_BC12_CHG_DET, PIN(6, 2), GPIO_INPUT)
+GPIO(USB_C1_BC12_CHG_DET, PIN(8, 3), GPIO_INPUT)
+GPIO(USB_C2_BC12_CHG_DET, PIN(E, 4), GPIO_INPUT)
+
 GPIO(BOARD_VERSION1, PIN(9, 6), GPIO_INPUT)
 GPIO(BOARD_VERSION2, PIN(9, 3), GPIO_INPUT)
 GPIO(BOARD_VERSION3, PIN(F, 0), GPIO_INPUT)