iio: hid-sensors: Compass 3D: 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>
diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
index 6d162b7..131ced0 100644
--- a/drivers/iio/magnetometer/hid-sensor-magn-3d.c
+++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
@@ -42,6 +42,10 @@
struct hid_sensor_common common_attributes;
struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX];
u32 magn_val[MAGN_3D_CHANNEL_MAX];
+ int scale_pre_decml;
+ int scale_post_decml;
+ int scale_precision;
+ int value_offset;
};
static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
@@ -124,12 +128,12 @@
ret_type = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SCALE:
- *val = magn_state->magn[CHANNEL_SCAN_INDEX_X].units;
- ret_type = IIO_VAL_INT;
+ *val = magn_state->scale_pre_decml;
+ *val2 = magn_state->scale_post_decml;
+ ret_type = magn_state->scale_precision;
break;
case IIO_CHAN_INFO_OFFSET:
- *val = hid_sensor_convert_exponent(
- magn_state->magn[CHANNEL_SCAN_INDEX_X].unit_expo);
+ *val = magn_state->value_offset;
ret_type = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SAMP_FREQ:
@@ -263,6 +267,11 @@
st->magn[1].index, st->magn[1].report_id,
st->magn[2].index, st->magn[2].report_id);
+ st->scale_precision = hid_sensor_format_scale(
+ HID_USAGE_SENSOR_COMPASS_3D,
+ &st->magn[CHANNEL_SCAN_INDEX_X],
+ &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,
