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 <[email protected]> --- Changes in v8: - Remove unnecessary variable host_event Changes in v7: None 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 | 20 ++++++++++++++++++++ include/linux/mfd/cros_ec.h | 9 +++++++++ 2 files changed, 29 insertions(+) diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index f9677747cb3e..da4188eecea4 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -487,3 +487,23 @@ 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) +{ + 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(ec_dev->event_data.data.host_event)) { + dev_warn(ec_dev->dev, "Invalid host event size\n"); + return 0; + } + + return get_unaligned_le32(&ec_dev->event_data.data.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 5d965aff5065..a39ed030d34f 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -288,6 +288,15 @@ 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. + * + * @ec_dev: Device to fetch event from + * + * Returns: event mask of the event that caused the last interrupt to be raised + */ +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; -- 2.5.5
