chrome platform changes for v4.21

Changes for EC_MKBP_EVENT_SENSOR_FIFO handling.
 Also, maintainership changes. Olofj out, Enric balletbo in.
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Merge tag 'tag-chrome-platform-for-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform

Pull chrome platform updates from Benson Leung:

 - Changes for EC_MKBP_EVENT_SENSOR_FIFO handling.

 - Also, maintainership changes. Olofj out, Enric balletbo in.

* tag 'tag-chrome-platform-for-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform:
  MAINTAINERS: add maintainers for ChromeOS EC sub-drivers
  MAINTAINERS: platform/chrome: Add Enric as a maintainer
  MAINTAINERS: platform/chrome: remove myself as maintainer
  platform/chrome: don't report EC_MKBP_EVENT_SENSOR_FIFO as wakeup
  platform/chrome: straighten out cros_ec_get_{next,host}_event() error codes

MAINTAINERS

@@ -3674,11 +3674,20 @@ F:	drivers/input/touchscreen/chipone_icn8505.c
 
 CHROME HARDWARE PLATFORM SUPPORT
 M:	Benson Leung <bleung@chromium.org>
-M:	Olof Johansson <olof@lixom.net>
+M:	Enric Balletbo i Serra <enric.balletbo@collabora.com>
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform.git
 F:	drivers/platform/chrome/
 
+CHROMEOS EC SUBDRIVERS
+M:	Benson Leung <bleung@chromium.org>
+M:	Enric Balletbo i Serra <enric.balletbo@collabora.com>
+R:	Guenter Roeck <groeck@chromium.org>
+S:	Maintained
+N:	cros_ec
+N:	cros-ec
+F:	drivers/power/supply/cros_usbpd-charger.c
+
 CIRRUS LOGIC AUDIO CODEC DRIVERS
 M:	Brian Austin <brian.austin@cirrus.com>
 M:	Paul Handrigan <Paul.Handrigan@cirrus.com>

drivers/platform/chrome/cros_ec_proto.c

@@ -575,12 +575,13 @@ static int get_keyboard_state_event(struct cros_ec_device *ec_dev)
 
 int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event)
 {
+	u8 event_type;
 	u32 host_event;
 	int ret;
 
 	if (!ec_dev->mkbp_event_supported) {
 		ret = get_keyboard_state_event(ec_dev);
-		if (ret < 0)
+		if (ret <= 0)
 			return ret;
 
 		if (wake_event)
@@ -590,15 +591,26 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event)
 	}
 
 	ret = get_next_event(ec_dev);
-	if (ret < 0)
+	if (ret <= 0)
 		return ret;
 
 	if (wake_event) {
+		event_type = ec_dev->event_data.event_type;
 		host_event = cros_ec_get_host_event(ec_dev);
 
-		/* Consider non-host_event as wake event */
-		*wake_event = !host_event ||
-			      !!(host_event & ec_dev->host_event_wake_mask);
+		/*
+		 * Sensor events need to be parsed by the sensor sub-device.
+		 * Defer them, and don't report the wakeup here.
+		 */
+		if (event_type == EC_MKBP_EVENT_SENSOR_FIFO)
+			*wake_event = false;
+		/* Masked host-events should not count as wake events. */
+		else if (host_event &&
+			 !(host_event & ec_dev->host_event_wake_mask))
+			*wake_event = false;
+		/* Consider all other events as wake events. */
+		else
+			*wake_event = true;
 	}
 
 	return ret;

include/linux/mfd/cros_ec.h

@@ -317,7 +317,9 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev);
  * @wake_event: Pointer to a bool set to true upon return if the event might be
  *              treated as a wake event. Ignored if null.
  *
- * Return: 0 on success or negative error code.
+ * Return: negative error code on errors; 0 for no data; or else number of
+ * bytes received (i.e., an event was retrieved successfully). Event types are
+ * written out to @ec_dev->event_data.event_type on success.
  */
 int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event);
 
@@ -329,7 +331,7 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event);
  * events raised and call the functions in the ec notifier. This function
  * is a helper to know which events are raised.
  *
- * Return: 0 on success or negative error code.
+ * Return: 0 on error or non-zero bitmask of one or more EC_HOST_EVENT_*.
  */
 u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev);