iio: hid-sensors: ALS: 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/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index 621541fb10a9867ea8cecbbecd532b3be65fd3e3..39b50be9d456d7897f725b96f3db04958af25069 100644 (file)
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -37,6 +37,10 @@ struct als_state {
        struct hid_sensor_common common_attributes;
        struct hid_sensor_hub_attribute_info als_illum;
        u32 illum;
+       int scale_pre_decml;
+       int scale_post_decml;
+       int scale_precision;
+       int value_offset;
 };
 
 /* Channel definitions */
@@ -102,12 +106,12 @@ static int als_read_raw(struct iio_dev *indio_dev,
                ret_type = IIO_VAL_INT;
                break;
        case IIO_CHAN_INFO_SCALE:
-               *val = als_state->als_illum.units;
-               ret_type = IIO_VAL_INT;
+               *val = als_state->scale_pre_decml;
+               *val2 = als_state->scale_post_decml;
+               ret_type = als_state->scale_precision;
                break;
        case IIO_CHAN_INFO_OFFSET:
-               *val = hid_sensor_convert_exponent(
-                               als_state->als_illum.unit_expo);
+               *val = als_state->value_offset;
                ret_type = IIO_VAL_INT;
                break;
        case IIO_CHAN_INFO_SAMP_FREQ:
@@ -229,6 +233,11 @@ static int als_parse_report(struct platform_device *pdev,
        dev_dbg(&pdev->dev, "als %x:%x\n", st->als_illum.index,
                        st->als_illum.report_id);
 
+       st->scale_precision = hid_sensor_format_scale(
+                               HID_USAGE_SENSOR_ALS,
+                               &st->als_illum,
+                               &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,