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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>
This commit is contained in:
Srinivas Pandruvada 2014-04-19 00:22:00 +01:00 committed by Jonathan Cameron
parent 6c7db77e40
commit 36783d09f1
1 changed files with 13 additions and 4 deletions
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17
drivers/iio/light/hid-sensor-als.c
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@ -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,