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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2016-11-29 01:41:16 +0300
committerJonathan Cameron <jic23@kernel.org>2016-12-03 13:06:13 +0300
commita96cd0f901eecd9589477cc2cd46bdb4f1f3e49a (patch)
treee69ecac2bcf8692050cb2ffde059c9e562fc4576 /include
parent902c4b2446d468cc6e4940db1aa72ee4d144dd35 (diff)
downloadlinux-a96cd0f901eecd9589477cc2cd46bdb4f1f3e49a.tar.xz
iio: accel: hid-sensor-accel-3d: Add timestamp
Added timestamp channel. With this change, each sample has a timestamp. This timestamp can be from the sensor hub when present or local kernel timestamp. HID sensors can send timestamp with input data using usage id HID_USAGE_SENSOR_TIME_TIMESTAMP. This timestamp value is converted to nano seconds before pushing this sample to the iio core. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/hid-sensor-hub.h4
-rw-r--r--include/linux/hid-sensor-ids.h1
2 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h
index dd85f3503410..7ef111d3ecc5 100644
--- a/include/linux/hid-sensor-hub.h
+++ b/include/linux/hid-sensor-hub.h
@@ -232,6 +232,7 @@ struct hid_sensor_common {
atomic_t data_ready;
atomic_t user_requested_state;
struct iio_trigger *trigger;
+ int timestamp_ns_scale;
struct hid_sensor_hub_attribute_info poll;
struct hid_sensor_hub_attribute_info report_state;
struct hid_sensor_hub_attribute_info power_state;
@@ -271,4 +272,7 @@ int hid_sensor_format_scale(u32 usage_id,
s32 hid_sensor_read_poll_value(struct hid_sensor_common *st);
+int64_t hid_sensor_convert_timestamp(struct hid_sensor_common *st,
+ int64_t raw_value);
+
#endif
diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h
index f2ee90aed0c2..9a3a9db1b39d 100644
--- a/include/linux/hid-sensor-ids.h
+++ b/include/linux/hid-sensor-ids.h
@@ -95,6 +95,7 @@
#define HID_USAGE_SENSOR_TIME_HOUR 0x200525
#define HID_USAGE_SENSOR_TIME_MINUTE 0x200526
#define HID_USAGE_SENSOR_TIME_SECOND 0x200527
+#define HID_USAGE_SENSOR_TIME_TIMESTAMP 0x200529
/* Units */
#define HID_USAGE_SENSOR_UNITS_NOT_SPECIFIED 0x00