diff options
| author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2015-02-19 15:33:56 -0800 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2015-02-23 15:16:37 +0100 |
| commit | b3f4737d00de317d1549d5cb5b1dad90e19f5cec (patch) | |
| tree | 92cb55d8f19f340f2daf779336368cb3a34e8426 /include/linux/hid-sensor-hub.h | |
| parent | cb67126f32f008b9abe97fbfca9b23a797b2458a (diff) | |
HID: hid-sensor-hub: Extend API for async reads
Add additional flag to read in async mode. In this mode the caller will get
reply via registered callback for capture_sample. Callbacks can be registered
using sensor_hub_register_callback function. The usage id parameter of the
capture_sample can be matched with the usage id of the requested attribute.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/linux/hid-sensor-hub.h')
| -rw-r--r-- | include/linux/hid-sensor-hub.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h index 60a34277ddf2..4c49b041922d 100644 --- a/include/linux/hid-sensor-hub.h +++ b/include/linux/hid-sensor-hub.h @@ -169,19 +169,27 @@ int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, struct hid_sensor_hub_attribute_info *info); /** -* sensor_hub_input_attr_get_raw_value() - Synchronous read request +* sensor_hub_input_attr_get_raw_value() - Attribute read request * @usage_id: Attribute usage id of parent physical device as per spec * @attr_usage_id: Attribute usage id as per spec * @report_id: Report id to look for +* @flag: Synchronous or asynchronous read * -* Issues a synchronous read request for an input attribute. Returns -* data upto 32 bits. Since client can get events, so this call should -* not be used for data paths, this will impact performance. +* Issues a synchronous or asynchronous read request for an input attribute. +* Returns data upto 32 bits. */ +enum sensor_hub_read_flags { + SENSOR_HUB_SYNC, + SENSOR_HUB_ASYNC, +}; + int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, - u32 usage_id, - u32 attr_usage_id, u32 report_id); + u32 usage_id, + u32 attr_usage_id, u32 report_id, + enum sensor_hub_read_flags flag +); + /** * sensor_hub_set_feature() - Feature set request * @report_id: Report id to look for |