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iio: hid-sensor-rotation: Add timestamp channel 

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>
Link: https://lore.kernel.org/r/20210105093515.19135-7-xiang.ye@intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
master
Ye Xiang 2021-01-05 17:35:15 +08:00 committed by Jonathan Cameron
parent 04fe70d1b8
commit 4a3582c84a
1 changed files with 26 additions and 20 deletions
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46
drivers/iio/orientation/hid-sensor-rotation.c
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@ -20,11 +20,15 @@ struct dev_rot_state {
struct hid_sensor_hub_callbacks callbacks;
struct hid_sensor_common common_attributes;
struct hid_sensor_hub_attribute_info quaternion;
u32 sampled_vals[4];
struct {
u32 sampled_vals[4] __aligned(16);
u64 timestamp __aligned(8);
} scan;
int scale_pre_decml;
int scale_post_decml;
int scale_precision;
int value_offset;
s64 timestamp;
};
/* Channel definitions */
@ -37,8 +41,10 @@ static const struct iio_chan_spec dev_rot_channels[] = {
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_OFFSET) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_HYSTERESIS)
}
BIT(IIO_CHAN_INFO_HYSTERESIS),
.scan_index = 0
},
IIO_CHAN_SOFT_TIMESTAMP(1)
};
/* Adjust channel real bits based on report descriptor */
@ -70,7 +76,7 @@ static int dev_rot_read_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_RAW:
if (size >= 4) {
for (i = 0; i < 4; ++i)
vals[i] = rot_state->sampled_vals[i];
vals[i] = rot_state->scan.sampled_vals[i];
ret_type = IIO_VAL_INT_MULTIPLE;
*val_len = 4;
} else
@ -132,15 +138,6 @@ static const struct iio_info dev_rot_info = {
.write_raw = &dev_rot_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);
dev_dbg(&indio_dev->dev, "hid_sensor_push_data <<\n");
}
/* Callback handler to send event after all samples are received and captured */
static int dev_rot_proc_event(struct hid_sensor_hub_device *hsdev,
unsigned usage_id,
@ -150,10 +147,15 @@ static int dev_rot_proc_event(struct hid_sensor_hub_device *hsdev,
struct dev_rot_state *rot_state = iio_priv(indio_dev);
dev_dbg(&indio_dev->dev, "dev_rot_proc_event\n");
if (atomic_read(&rot_state->common_attributes.data_ready))
hid_sensor_push_data(indio_dev,
(u8 *)rot_state->sampled_vals,
sizeof(rot_state->sampled_vals));
if (atomic_read(&rot_state->common_attributes.data_ready)) {
if (!rot_state->timestamp)
rot_state->timestamp = iio_get_time_ns(indio_dev);
iio_push_to_buffers_with_timestamp(indio_dev, &rot_state->scan,
rot_state->timestamp);
rot_state->timestamp = 0;
}
return 0;
}
@ -168,10 +170,14 @@ static int dev_rot_capture_sample(struct hid_sensor_hub_device *hsdev,
struct dev_rot_state *rot_state = iio_priv(indio_dev);
if (usage_id == HID_USAGE_SENSOR_ORIENT_QUATERNION) {
memcpy(rot_state->sampled_vals, raw_data,
sizeof(rot_state->sampled_vals));
memcpy(&rot_state->scan.sampled_vals, raw_data,
sizeof(rot_state->scan.sampled_vals));
dev_dbg(&indio_dev->dev, "Recd Quat len:%zu::%zu\n", raw_len,
sizeof(rot_state->sampled_vals));
sizeof(rot_state->scan.sampled_vals));
} else if (usage_id == HID_USAGE_SENSOR_TIME_TIMESTAMP) {
rot_state->timestamp = hid_sensor_convert_timestamp(&rot_state->common_attributes,
*(s64 *)raw_data);
}
return 0;