lkml.org 
[lkml]   [2021]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/6] iio: hid-sensor-magn-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/magnetometer/hid-sensor-magn-3d.c | 48 ++++++++++++-------
1 file changed, 30 insertions(+), 18 deletions(-)

diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
index cacbd053b2c6..b79c8a5a98f9 100644
--- a/drivers/iio/magnetometer/hid-sensor-magn-3d.c
+++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
@@ -24,6 +24,7 @@ enum magn_3d_channel {
CHANNEL_SCAN_INDEX_NORTH_TRUE_TILT_COMP,
CHANNEL_SCAN_INDEX_NORTH_MAGN,
CHANNEL_SCAN_INDEX_NORTH_TRUE,
+ CHANNEL_SCAN_INDEX_TIMESTAMP,
MAGN_3D_CHANNEL_MAX,
};

@@ -47,6 +48,7 @@ struct magn_3d_state {

struct common_attributes magn_flux_attr;
struct common_attributes rot_attr;
+ s64 timestamp;
};

static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
@@ -57,6 +59,7 @@ static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH,
HID_USAGE_SENSOR_ORIENT_MAGN_NORTH,
HID_USAGE_SENSOR_ORIENT_TRUE_NORTH,
+ HID_USAGE_SENSOR_TIME_TIMESTAMP,
};

static const u32 magn_3d_sensitivity_addresses[] = {
@@ -132,7 +135,8 @@ static const struct iio_chan_spec magn_3d_channels[] = {
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_HYSTERESIS),
- }
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(7)
};

/* Adjust channel real bits based on report descriptor */
@@ -281,13 +285,6 @@ static const struct iio_info magn_3d_info = {
.write_raw = &magn_3d_write_raw,
};

-/* Function to push data to buffer */
-static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data)
-{
- dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
- iio_push_to_buffers(indio_dev, data);
-}
-
/* Callback handler to send event after all samples are received and captured */
static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
unsigned usage_id,
@@ -297,8 +294,15 @@ static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
struct magn_3d_state *magn_state = iio_priv(indio_dev);

dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n");
- if (atomic_read(&magn_state->magn_flux_attributes.data_ready))
- hid_sensor_push_data(indio_dev, magn_state->iio_vals);
+ if (atomic_read(&magn_state->magn_flux_attributes.data_ready)) {
+ if (!magn_state->timestamp)
+ magn_state->timestamp = iio_get_time_ns(indio_dev);
+
+ iio_push_to_buffers_with_timestamp(indio_dev,
+ magn_state->iio_vals,
+ magn_state->timestamp);
+ magn_state->timestamp = 0;
+ }

return 0;
}
@@ -329,6 +333,11 @@ static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
offset = (usage_id - HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH)
+ CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP;
break;
+ case HID_USAGE_SENSOR_TIME_TIMESTAMP:
+ magn_state->timestamp =
+ hid_sensor_convert_timestamp(&magn_state->magn_flux_attributes,
+ *(s64 *)raw_data);
+ return ret;
default:
return -EINVAL;
}
@@ -394,9 +403,10 @@ static int magn_3d_parse_report(struct platform_device *pdev,
return -ENOMEM;
}

- st->iio_vals = devm_kcalloc(&pdev->dev, attr_count,
- sizeof(u32),
- GFP_KERNEL);
+ /* attr_count include timestamp channel, and the iio_vals should be aligned to 8byte */
+ st->iio_vals = devm_kcalloc(&pdev->dev,
+ ((attr_count + 1) % 2 + (attr_count + 1) / 2) * 2,
+ sizeof(u32), GFP_KERNEL);
if (!st->iio_vals) {
dev_err(&pdev->dev,
"failed to allocate space for iio values array\n");
@@ -412,11 +422,13 @@ static int magn_3d_parse_report(struct platform_device *pdev,
(_channels[*chan_count]).scan_index = *chan_count;
(_channels[*chan_count]).address = i;

- /* Set magn_val_addr to iio value address */
- st->magn_val_addr[i] = &(st->iio_vals[*chan_count]);
- magn_3d_adjust_channel_bit_mask(_channels,
- *chan_count,
- st->magn[i].size);
+ if (i != CHANNEL_SCAN_INDEX_TIMESTAMP) {
+ /* Set magn_val_addr to iio value address */
+ st->magn_val_addr[i] = &st->iio_vals[*chan_count];
+ magn_3d_adjust_channel_bit_mask(_channels,
+ *chan_count,
+ st->magn[i].size);
+ }
(*chan_count)++;
}
}
--
2.17.1
\
 
 \ /
  Last update: 2021-01-05 10:37    [W:0.067 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site