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iio: hid-sensors: Add api to get poll value
Added interface to get poll value in milli-seconds. This value is changed by changing sampling frequency. This API allows clients to wait for at least some poll milli seconds before reading a new sample. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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5d02edfc39
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2 changed files with 22 additions and 0 deletions
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@ -147,6 +147,26 @@ static u32 convert_to_vtf_format(int size, int exp, int val1, int val2)
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return value;
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return value;
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}
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}
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s32 hid_sensor_read_poll_value(struct hid_sensor_common *st)
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{
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s32 value = 0;
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int ret;
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ret = sensor_hub_get_feature(st->hsdev,
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st->poll.report_id,
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st->poll.index, &value);
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if (ret < 0 || value < 0) {
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return -EINVAL;
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} else {
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if (st->poll.units == HID_USAGE_SENSOR_UNITS_SECOND)
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value = value * 1000;
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}
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return value;
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}
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EXPORT_SYMBOL(hid_sensor_read_poll_value);
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int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
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int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
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int *val1, int *val2)
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int *val1, int *val2)
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{
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{
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@ -227,4 +227,6 @@ int hid_sensor_format_scale(u32 usage_id,
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struct hid_sensor_hub_attribute_info *attr_info,
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struct hid_sensor_hub_attribute_info *attr_info,
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int *val0, int *val1);
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int *val0, int *val1);
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s32 hid_sensor_read_poll_value(struct hid_sensor_common *st);
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#endif
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#endif
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