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authorYe Xiang <xiang.ye@intel.com>2021-07-31 11:25:56 +0800
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2021-08-09 20:17:36 +0100
commit3304d2b69a36996fb9bf708310de5cd76a04c09e (patch)
treebc9fbe2aa4ba62941dd34321b20d3209cfa3c105 /drivers/iio
parent394a0150a0644389ce4d587f5c67393308eec28c (diff)
downloadlinux-3304d2b69a36996fb9bf708310de5cd76a04c09e.tar.bz2
iio: hid-sensor-press: 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. The unit of timestamp is nanosecond. Signed-off-by: Ye Xiang <xiang.ye@intel.com> Link: https://lore.kernel.org/r/20210731032556.26813-1-xiang.ye@intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/pressure/hid-sensor-press.c40
1 files changed, 24 insertions, 16 deletions
diff --git a/drivers/iio/pressure/hid-sensor-press.c b/drivers/iio/pressure/hid-sensor-press.c
index dcd593c426b4..a9215eb32d70 100644
--- a/drivers/iio/pressure/hid-sensor-press.c
+++ b/drivers/iio/pressure/hid-sensor-press.c
@@ -13,17 +13,24 @@
#include <linux/iio/buffer.h>
#include "../common/hid-sensors/hid-sensor-trigger.h"
-#define CHANNEL_SCAN_INDEX_PRESSURE 0
+enum {
+ CHANNEL_SCAN_INDEX_PRESSURE,
+ CHANNEL_SCAN_INDEX_TIMESTAMP,
+};
struct press_state {
struct hid_sensor_hub_callbacks callbacks;
struct hid_sensor_common common_attributes;
struct hid_sensor_hub_attribute_info press_attr;
- u32 press_data;
+ struct {
+ u32 press_data;
+ u64 timestamp __aligned(8);
+ } scan;
int scale_pre_decml;
int scale_post_decml;
int scale_precision;
int value_offset;
+ s64 timestamp;
};
static const u32 press_sensitivity_addresses[] = {
@@ -41,7 +48,9 @@ static const struct iio_chan_spec press_channels[] = {
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_HYSTERESIS),
.scan_index = CHANNEL_SCAN_INDEX_PRESSURE,
- }
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
+
};
/* Adjust channel real bits based on report descriptor */
@@ -154,14 +163,6 @@ static const struct iio_info press_info = {
.write_raw = &press_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 press_proc_event(struct hid_sensor_hub_device *hsdev,
unsigned usage_id,
@@ -171,10 +172,13 @@ static int press_proc_event(struct hid_sensor_hub_device *hsdev,
struct press_state *press_state = iio_priv(indio_dev);
dev_dbg(&indio_dev->dev, "press_proc_event\n");
- if (atomic_read(&press_state->common_attributes.data_ready))
- hid_sensor_push_data(indio_dev,
- &press_state->press_data,
- sizeof(press_state->press_data));
+ if (atomic_read(&press_state->common_attributes.data_ready)) {
+ if (!press_state->timestamp)
+ press_state->timestamp = iio_get_time_ns(indio_dev);
+
+ iio_push_to_buffers_with_timestamp(
+ indio_dev, &press_state->scan, press_state->timestamp);
+ }
return 0;
}
@@ -191,9 +195,13 @@ static int press_capture_sample(struct hid_sensor_hub_device *hsdev,
switch (usage_id) {
case HID_USAGE_SENSOR_ATMOSPHERIC_PRESSURE:
- press_state->press_data = *(u32 *)raw_data;
+ press_state->scan.press_data = *(u32 *)raw_data;
ret = 0;
break;
+ case HID_USAGE_SENSOR_TIME_TIMESTAMP:
+ press_state->timestamp = hid_sensor_convert_timestamp(
+ &press_state->common_attributes, *(s64 *)raw_data);
+ break;
default:
break;
}