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iio: hid-sensor-gyro-3d: Add timestamp channel

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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/20210105093515.19135-3-xiang.ye@intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Ye Xiang 2021-01-05 17:35:11 +08:00 committed by Jonathan Cameron
parent 4c2617207e
commit 4648cbd8fb
1 changed files with 24 additions and 16 deletions
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40
drivers/iio/gyro/hid-sensor-gyro-3d.c
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@ -23,15 +23,20 @@ enum gyro_3d_channel {
GYRO_3D_CHANNEL_MAX,
};
#define CHANNEL_SCAN_INDEX_TIMESTAMP GYRO_3D_CHANNEL_MAX
struct gyro_3d_state {
struct hid_sensor_hub_callbacks callbacks;
struct hid_sensor_common common_attributes;
struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX];
u32 gyro_val[GYRO_3D_CHANNEL_MAX];
struct {
u32 gyro_val[GYRO_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 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = {
@ -72,7 +77,8 @@ static const struct iio_chan_spec gyro_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 */
@ -178,14 +184,6 @@ static const struct iio_info gyro_3d_info = {
.write_raw = &gyro_3d_write_raw,
};
/* Function to push data to buffer */
static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
int len)
{
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 gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev,
unsigned usage_id,
@ -195,10 +193,15 @@ static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev,
struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
dev_dbg(&indio_dev->dev, "gyro_3d_proc_event\n");
if (atomic_read(&gyro_state->common_attributes.data_ready))
hid_sensor_push_data(indio_dev,
gyro_state->gyro_val,
sizeof(gyro_state->gyro_val));
if (atomic_read(&gyro_state->common_attributes.data_ready)) {
if (!gyro_state->timestamp)
gyro_state->timestamp = iio_get_time_ns(indio_dev);
iio_push_to_buffers_with_timestamp(indio_dev, &gyro_state->scan,
gyro_state->timestamp);
gyro_state->timestamp = 0;
}
return 0;
}
@ -219,10 +222,15 @@ static int gyro_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS:
case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS:
offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS;
gyro_state->gyro_val[CHANNEL_SCAN_INDEX_X + offset] =
*(u32 *)raw_data;
gyro_state->scan.gyro_val[CHANNEL_SCAN_INDEX_X + offset] =
*(u32 *)raw_data;
ret = 0;
break;
case HID_USAGE_SENSOR_TIME_TIMESTAMP:
gyro_state->timestamp =
hid_sensor_convert_timestamp(&gyro_state->common_attributes,
*(s64 *)raw_data);
break;
default:
break;
}