diff --git a/drivers/power/supply/cros_peripheral_charger.c b/drivers/power/supply/cros_peripheral_charger.c
index 305f10dfc06d1b..cb402f48087ddf 100644
--- a/drivers/power/supply/cros_peripheral_charger.c
+++ b/drivers/power/supply/cros_peripheral_charger.c
@@ -14,6 +14,7 @@
 #include <linux/slab.h>
 #include <linux/stringify.h>
 #include <linux/types.h>
+#include <asm/unaligned.h>
 
 #define DRV_NAME		"cros-ec-pchg"
 #define PCHG_DIR_PREFIX		"peripheral"
@@ -237,46 +238,22 @@ static int cros_pchg_event(const struct charger_data *charger,
 	return NOTIFY_OK;
 }
 
-static u32 cros_get_device_event(const struct charger_data *charger)
-{
-	struct ec_params_device_event req;
-	struct ec_response_device_event rsp;
-	struct device *dev = charger->dev;
-	int ret;
-
-	req.param = EC_DEVICE_EVENT_PARAM_GET_CURRENT_EVENTS;
-	ret = cros_pchg_ec_command(charger, 0, EC_CMD_DEVICE_EVENT,
-				   &req, sizeof(req), &rsp, sizeof(rsp));
-	if (ret < 0) {
-		dev_warn(dev, "Unable to get device events (err:%d)\n", ret);
-		return 0;
-	}
-
-	return rsp.event_mask;
-}
-
 static int cros_ec_notify(struct notifier_block *nb,
 			  unsigned long queued_during_suspend,
 			  void *data)
 {
 	struct cros_ec_device *ec_dev = (struct cros_ec_device *)data;
-	u32 host_event = cros_ec_get_host_event(ec_dev);
 	struct charger_data *charger =
 			container_of(nb, struct charger_data, notifier);
-	u32 device_event_mask;
+	u32 host_event;
 
-	if (!host_event)
+	if (ec_dev->event_data.event_type != EC_MKBP_EVENT_PCHG
+			|| ec_dev->event_size != sizeof(host_event))
 		return NOTIFY_DONE;
 
-	if (!(host_event & EC_HOST_EVENT_MASK(EC_HOST_EVENT_DEVICE)))
-		return NOTIFY_DONE;
+	host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);
 
-	/*
-	 * todo: Retrieve device event mask in common place
-	 * (e.g. cros_ec_proto.c).
-	 */
-	device_event_mask = cros_get_device_event(charger);
-	if (!(device_event_mask & EC_DEVICE_EVENT_MASK(EC_DEVICE_EVENT_WLC)))
+	if (!(host_event & EC_MKBP_PCHG_DEVICE_EVENT))
 		return NOTIFY_DONE;
 
 	return cros_pchg_event(charger, host_event);
diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
index 271bd87bff0a25..c784bed3388865 100644
--- a/include/linux/platform_data/cros_ec_commands.h
+++ b/include/linux/platform_data/cros_ec_commands.h
@@ -3386,6 +3386,9 @@ enum ec_mkbp_event {
 	/* Send an incoming CEC message to the AP */
 	EC_MKBP_EVENT_CEC_MESSAGE = 9,
 
+	/* Peripheral device charger event */
+	EC_MKBP_EVENT_PCHG = 12,
+
 	/* Number of MKBP events */
 	EC_MKBP_EVENT_COUNT,
 };
@@ -5527,6 +5530,67 @@ enum pchg_state {
 	[PCHG_STATE_CONNECTED] = "CONNECTED", \
 	}
 
+/**
+ * Update firmware of peripheral chip
+ */
+#define EC_CMD_PCHG_UPDATE 0x0136
+
+/* Port number is encoded in bit[28:31]. */
+#define EC_MKBP_PCHG_PORT_SHIFT		28
+/* Utility macro for converting MKBP event to port number. */
+#define EC_MKBP_PCHG_EVENT_TO_PORT(e)	(((e) >> EC_MKBP_PCHG_PORT_SHIFT) & 0xf)
+/* Utility macro for extracting event bits. */
+#define EC_MKBP_PCHG_EVENT_MASK(e)	((e) \
+					& GENMASK(EC_MKBP_PCHG_PORT_SHIFT-1, 0))
+
+#define EC_MKBP_PCHG_UPDATE_OPENED	BIT(0)
+#define EC_MKBP_PCHG_WRITE_COMPLETE	BIT(1)
+#define EC_MKBP_PCHG_UPDATE_CLOSED	BIT(2)
+#define EC_MKBP_PCHG_UPDATE_ERROR	BIT(3)
+#define EC_MKBP_PCHG_DEVICE_EVENT	BIT(4)
+
+enum ec_pchg_update_cmd {
+	/* Reset chip to normal mode. */
+	EC_PCHG_UPDATE_CMD_RESET_TO_NORMAL = 0,
+	/* Reset and put a chip in update (a.k.a. download) mode. */
+	EC_PCHG_UPDATE_CMD_OPEN,
+	/* Write a block of data containing FW image. */
+	EC_PCHG_UPDATE_CMD_WRITE,
+	/* Close update session. */
+	EC_PCHG_UPDATE_CMD_CLOSE,
+	/* End of commands */
+	EC_PCHG_UPDATE_CMD_COUNT,
+};
+
+struct ec_params_pchg_update {
+	/* PCHG port number */
+	uint8_t port;
+	/* enum ec_pchg_update_cmd */
+	uint8_t cmd;
+	/* Padding */
+	uint8_t reserved0;
+	uint8_t reserved1;
+	/* Version of new firmware */
+	uint32_t version;
+	/* CRC32 of new firmware */
+	uint32_t crc32;
+	/* Address in chip memory where <data> is written to */
+	uint32_t addr;
+	/* Size of <data> */
+	uint32_t size;
+	/* Partial data of new firmware */
+	uint8_t data[];
+} __ec_align4;
+
+BUILD_ASSERT(EC_PCHG_UPDATE_CMD_COUNT
+	     < BIT(sizeof(((struct ec_params_pchg_update *)0)->cmd)*8));
+
+struct ec_response_pchg_update {
+	/* Block size */
+	uint32_t block_size;
+} __ec_align4;
+
+
 /*****************************************************************************/
 /* Voltage regulator controls */
 
