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.viz...@collabora.com>
---
Changes in v6:
- Return 0 if the EC doesn't support MKBP, as expected by callers.
Changes in v5: None
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 aaccdde1c9d5..3e1e83874edf 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 0;
+ }
+
+ 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
