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Subject[PATCH 5/6] iio: hid-sensor-incl-3d: Add timestamp channel
Date
Each sample has a timestamp field with this change. This timestamp may
be from the sensor hub when present or local kernel timestamp. And the
unit of timestamp is nanosecond.

Signed-off-by: Ye Xiang <xiang.ye@intel.com>
---
drivers/iio/orientation/hid-sensor-incl-3d.c | 43 ++++++++++++--------
1 file changed, 27 insertions(+), 16 deletions(-)

diff --git a/drivers/iio/orientation/hid-sensor-incl-3d.c b/drivers/iio/orientation/hid-sensor-incl-3d.c
index df2fe91e8117..3baa52fbb426 100644
--- a/drivers/iio/orientation/hid-sensor-incl-3d.c
+++ b/drivers/iio/orientation/hid-sensor-incl-3d.c
@@ -24,15 +24,21 @@ enum incl_3d_channel {
INCLI_3D_CHANNEL_MAX,
};

+#define CHANNEL_SCAN_INDEX_TIMESTAMP INCLI_3D_CHANNEL_MAX
+
struct incl_3d_state {
struct hid_sensor_hub_callbacks callbacks;
struct hid_sensor_common common_attributes;
struct hid_sensor_hub_attribute_info incl[INCLI_3D_CHANNEL_MAX];
- u32 incl_val[INCLI_3D_CHANNEL_MAX];
+ struct {
+ u32 incl_val[INCLI_3D_CHANNEL_MAX];
+ u64 timestamp __aligned(8);
+ } scan;
int scale_pre_decml;
int scale_post_decml;
int scale_precision;
int value_offset;
+ s64 timestamp;
};

static const u32 incl_3d_addresses[INCLI_3D_CHANNEL_MAX] = {
@@ -81,7 +87,8 @@ static const struct iio_chan_spec incl_3d_channels[] = {
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_HYSTERESIS),
.scan_index = CHANNEL_SCAN_INDEX_Z,
- }
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP),
};

/* Adjust channel real bits based on report descriptor */
@@ -186,13 +193,6 @@ static const struct iio_info incl_3d_info = {
.write_raw = &incl_3d_write_raw,
};

-/* Function to push data to buffer */
-static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
-{
- dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
- iio_push_to_buffers(indio_dev, (u8 *)data);
-}
-
/* Callback handler to send event after all samples are received and captured */
static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
unsigned usage_id,
@@ -202,10 +202,16 @@ static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
struct incl_3d_state *incl_state = iio_priv(indio_dev);

dev_dbg(&indio_dev->dev, "incl_3d_proc_event\n");
- if (atomic_read(&incl_state->common_attributes.data_ready))
- hid_sensor_push_data(indio_dev,
- (u8 *)incl_state->incl_val,
- sizeof(incl_state->incl_val));
+ if (atomic_read(&incl_state->common_attributes.data_ready)) {
+ if (!incl_state->timestamp)
+ incl_state->timestamp = iio_get_time_ns(indio_dev);
+
+ iio_push_to_buffers_with_timestamp(indio_dev,
+ &incl_state->scan,
+ incl_state->timestamp);
+
+ incl_state->timestamp = 0;
+ }

return 0;
}
@@ -222,13 +228,18 @@ static int incl_3d_capture_sample(struct hid_sensor_hub_device *hsdev,

switch (usage_id) {
case HID_USAGE_SENSOR_ORIENT_TILT_X:
- incl_state->incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data;
+ incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data;
break;
case HID_USAGE_SENSOR_ORIENT_TILT_Y:
- incl_state->incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data;
+ incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data;
break;
case HID_USAGE_SENSOR_ORIENT_TILT_Z:
- incl_state->incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data;
+ incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data;
+ break;
+ case HID_USAGE_SENSOR_TIME_TIMESTAMP:
+ incl_state->timestamp =
+ hid_sensor_convert_timestamp(&incl_state->common_attributes,
+ *(s64 *)raw_data);
break;
default:
ret = -EINVAL;
--
2.17.1
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