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| author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2014-04-19 00:22:00 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2014-05-05 10:59:48 +0100 |
| commit | a269b9a0a27675c34c62c4e20c4ffb62054cd51a (patch) | |
| tree | ccf8aa0887b23ffeb002dd6508a6831edf5774b1 | |
| parent | be8e48d67ecdb1cc1234ff4f32a6e5d0002e4672 (diff) | |
| download | linux-a269b9a0a27675c34c62c4e20c4ffb62054cd51a.tar.bz2 | |
iio: hid-sensors: Pressure: adjust scale and offset
Using units and unit exponent to calculate scale which is compliant
to IIO ABI.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | drivers/iio/pressure/hid-sensor-press.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/iio/pressure/hid-sensor-press.c b/drivers/iio/pressure/hid-sensor-press.c index e0e6409aa94e..ff69da4443b8 100644 --- a/drivers/iio/pressure/hid-sensor-press.c +++ b/drivers/iio/pressure/hid-sensor-press.c @@ -36,6 +36,10 @@ struct press_state { struct hid_sensor_common common_attributes; struct hid_sensor_hub_attribute_info press_attr; u32 press_data; + int scale_pre_decml; + int scale_post_decml; + int scale_precision; + int value_offset; }; /* Channel definitions */ @@ -102,12 +106,12 @@ static int press_read_raw(struct iio_dev *indio_dev, ret_type = IIO_VAL_INT; break; case IIO_CHAN_INFO_SCALE: - *val = press_state->press_attr.units; - ret_type = IIO_VAL_INT; + *val = press_state->scale_pre_decml; + *val2 = press_state->scale_post_decml; + ret_type = press_state->scale_precision; break; case IIO_CHAN_INFO_OFFSET: - *val = hid_sensor_convert_exponent( - press_state->press_attr.unit_expo); + *val = press_state->value_offset; ret_type = IIO_VAL_INT; break; case IIO_CHAN_INFO_SAMP_FREQ: @@ -229,6 +233,11 @@ static int press_parse_report(struct platform_device *pdev, dev_dbg(&pdev->dev, "press %x:%x\n", st->press_attr.index, st->press_attr.report_id); + st->scale_precision = hid_sensor_format_scale( + HID_USAGE_SENSOR_PRESSURE, + &st->press_attr, + &st->scale_pre_decml, &st->scale_post_decml); + /* Set Sensitivity field ids, when there is no individual modifier */ if (st->common_attributes.sensitivity.index < 0) { sensor_hub_input_get_attribute_info(hsdev, |