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 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