On 19/04/14 00:22, Srinivas Pandruvada wrote:
Added interface to get poll value in milli-seconds. This value is
changed by changing sampling frequency. This API allows clients
to wait for atleast some poll milli seconds before reading a new sample.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
applied to the togreg branch of iio.git
---
.../iio/common/hid-sensors/hid-sensor-attributes.c | 20 ++++++++++++++++++++
include/linux/hid-sensor-hub.h | 2 ++
2 files changed, 22 insertions(+)
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
index 451a95b..4a533b8 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
@@ -147,6 +147,26 @@ static u32 convert_to_vtf_format(int size, int exp, int val1, int val2)
return value;
}
+s32 hid_sensor_read_poll_value(struct hid_sensor_common *st)
+{
+ s32 value = 0;
+ int ret;
+
+ ret = sensor_hub_get_feature(st->hsdev,
+ st->poll.report_id,
+ st->poll.index, &value);
+
+ if (ret < 0 || value < 0) {
+ return -EINVAL;
+ } else {
+ if (st->poll.units == HID_USAGE_SENSOR_UNITS_SECOND)
+ value = value * 1000;
+ }
+
+ return value;
+}
+EXPORT_SYMBOL(hid_sensor_read_poll_value);
+
int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
int *val1, int *val2)
{
diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h
index 89626b2..88d8d63 100644
--- a/include/linux/hid-sensor-hub.h
+++ b/include/linux/hid-sensor-hub.h
@@ -227,4 +227,6 @@ int hid_sensor_format_scale(u32 usage_id,
struct hid_sensor_hub_attribute_info *attr_info,
int *val0, int *val1);
+s32 hid_sensor_read_poll_value(struct hid_sensor_common *st);
+
#endif
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