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Groups > linux.kernel > #1352853

[PATCH v4 3/6] mfd: cros_ec: Add cros_ec_get_host_event

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This function returns the code for the host event that triggered the
interrupt that is being currently handled.

Is to be used by observers of the event_notifier in the EC device.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

 drivers/platform/chrome/cros_ec_proto.c | 23 +++++++++++++++++++++++
 include/linux/mfd/cros_ec.h             | 10 ++++++++++
 2 files changed, 33 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index e45d6750bbdf..bbcced87e46c 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -486,3 +486,26 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
 	return ret;
 }
 EXPORT_SYMBOL(cros_ec_cmd_xfer_status);
+
+u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev)
+{
+	u32 host_event;
+
+	if (!ec_dev->mkbp_event_supported) {
+		dev_warn(ec_dev->dev,
+			 "This EC does not support EC_MKBP_EVENT_HOST_EVENT");
+		return -EPROTONOSUPPORT;
+	}
+
+	if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT)
+		return 0;
+
+	if (ec_dev->event_size != sizeof(host_event)) {
+		dev_warn(ec_dev->dev, "Invalid host event size\n");
+		return 0;
+	}
+
+	host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);
+	return host_event;
+}
+EXPORT_SYMBOL(cros_ec_get_host_event);
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index b6961c717209..1ef98d41870b 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -304,6 +304,16 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev);
  */
 int cros_ec_get_next_event(struct cros_ec_device *ec_dev);
 
+/**
+ * cros_ec_get_host_event - Return a mask of event set by the EC.
+ *
+ * Returns the mask of the event that caused the last interrupt to be raised.
+ *
+ * @ec_dev: Device to fetch event from
+ * @return event mask, 0 on error
+ */
+uint32_t cros_ec_get_host_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;
-- 
2.5.0

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[PATCH v4 0/6] EC-based USB Power Delivery support for Chrome machines Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2016-03-08 11:40 +0100
  [PATCH v4 5/6] power: cros_usbpd-charger: Add EC-based USB PD charger driver Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2016-03-08 11:40 +0100
    Re: [PATCH v4 5/6] power: cros_usbpd-charger: Add EC-based USB PD  charger driver Benson Leung <bleung@chromium.org> - 2016-03-15 23:40 +0100
  [PATCH v4 3/6] mfd: cros_ec: Add cros_ec_get_host_event Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2016-03-08 11:40 +0100
  [PATCH v4 1/6] mfd: cros_ec: Add MKBP event support Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2016-03-08 11:40 +0100
  [PATCH v4 4/6] mfd: cros_ec: Add more definitions for PD commands Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2016-03-08 11:40 +0100
  [PATCH v4 6/6] platform/chrome: Register USB PD charger device Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2016-03-08 11:40 +0100

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