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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2015-02-20 02:33:56 +0300
committerJiri Kosina <jkosina@suse.cz>2015-02-23 17:16:37 +0300
commitb3f4737d00de317d1549d5cb5b1dad90e19f5cec (patch)
tree92cb55d8f19f340f2daf779336368cb3a34e8426 /include/linux/hid-sensor-hub.h
parentcb67126f32f008b9abe97fbfca9b23a797b2458a (diff)
downloadlinux-b3f4737d00de317d1549d5cb5b1dad90e19f5cec.tar.xz
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.h20
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