2 files changed, 52 insertions, 0 deletions

diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index d641a18..76f7ef4 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -109,6 +109,10 @@ struct cros_ec_command {
  *     should check msg.result for the EC's result code.
  * @pkt_xfer: send packet to EC and get response
  * @lock: one transaction at a time
+ * @mkbp_event_supported: true if this EC supports the MKBP event protocol.
+ * @event_notifier: interrupt event notifier for transport devices.
+ * @event_data: raw payload transferred with the MKBP event.
+ * @event_size: size in bytes of the event data.
  */
 struct cros_ec_device {
 
@@ -137,6 +141,11 @@ struct cros_ec_device {
 	int (*pkt_xfer)(struct cros_ec_device *ec,
 			struct cros_ec_command *msg);
 	struct mutex lock;
+	bool mkbp_event_supported;
+	struct blocking_notifier_head event_notifier;
+
+	struct ec_response_get_next_event event_data;
+	int event_size;
 };
 
 /* struct cros_ec_platform - ChromeOS EC platform information
@@ -269,6 +278,15 @@ int cros_ec_register(struct cros_ec_device *ec_dev);
  */
 int cros_ec_query_all(struct cros_ec_device *ec_dev);
 
+/**
+ * cros_ec_get_next_event -  Fetch next event from the ChromeOS EC
+ *
+ * @ec_dev: Device to fetch event from
+ *
+ * Returns: 0 on success, Linux error number on failure
+ */
+int cros_ec_get_next_event(struct cros_ec_device *ec_dev);
+
 /* sysfs stuff */
 extern struct attribute_group cros_ec_attr_group;
 extern struct attribute_group cros_ec_lightbar_attr_group;
diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
index 7e7a8d4..76728ff 100644
--- a/include/linux/mfd/cros_ec_commands.h
+++ b/include/linux/mfd/cros_ec_commands.h
@@ -1793,6 +1793,40 @@ struct ec_result_keyscan_seq_ctrl {
 	};
 } __packed;
 
+/*
+ * Command for retrieving the next pending MKBP event from the EC device
+ *
+ * The device replies with UNAVAILABLE if there aren't any pending events.
+ */
+#define EC_CMD_GET_NEXT_EVENT 0x67
+
+enum ec_mkbp_event {
+	/* Keyboard matrix changed. The event data is the new matrix state. */
+	EC_MKBP_EVENT_KEY_MATRIX = 0,
+
+	/* New host event. The event data is 4 bytes of host event flags. */
+	EC_MKBP_EVENT_HOST_EVENT = 1,
+
+	/* New Sensor FIFO data. The event data is fifo_info structure. */
+	EC_MKBP_EVENT_SENSOR_FIFO = 2,
+
+	/* Number of MKBP events */
+	EC_MKBP_EVENT_COUNT,
+};
+
+union ec_response_get_next_data {
+	uint8_t   key_matrix[13];
+
+	/* Unaligned */
+	uint32_t  host_event;
+} __packed;
+
+struct ec_response_get_next_event {
+	uint8_t event_type;
+	/* Followed by event data if any */
+	union ec_response_get_next_data data;
+} __packed;
+
 /*****************************************************************************/
 /* Temperature sensor commands */