iio: hid-sensor-rotation: Add "scale" and "offset" properties parse support

Add orientation sensor "scale" and "offset" parse support.
These two properties are needed for exponent data conversion.

Signed-off-by: Song Hongyan <hongyan.song@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Reviewed-by: Xu Even <even.xu@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
index aeb09a8..0e05f6d 100644 (file)
--- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
@@ -69,6 +69,12 @@ static struct {
        {HID_USAGE_SENSOR_TIME_TIMESTAMP, HID_USAGE_SENSOR_UNITS_MILLISECOND,
                1000000, 0},
 
+       {HID_USAGE_SENSOR_DEVICE_ORIENTATION, 0, 1, 0},
+
+       {HID_USAGE_SENSOR_RELATIVE_ORIENTATION, 0, 1, 0},
+
+       {HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION, 0, 1, 0},
+
        {HID_USAGE_SENSOR_TEMPERATURE, 0, 1000, 0},
        {HID_USAGE_SENSOR_TEMPERATURE, HID_USAGE_SENSOR_UNITS_DEGREES, 1000, 0},
 

diff --git a/drivers/iio/orientation/hid-sensor-rotation.c b/drivers/iio/orientation/hid-sensor-rotation.c
index 60d3517..e9fa86c 100644 (file)
--- a/drivers/iio/orientation/hid-sensor-rotation.c
+++ b/drivers/iio/orientation/hid-sensor-rotation.c
@@ -31,6 +31,10 @@ struct dev_rot_state {
        struct hid_sensor_common common_attributes;
        struct hid_sensor_hub_attribute_info quaternion;
        u32 sampled_vals[4];
+       int scale_pre_decml;
+       int scale_post_decml;
+       int scale_precision;
+       int value_offset;
 };
 
 /* Channel definitions */
@@ -41,6 +45,8 @@ static const struct iio_chan_spec dev_rot_channels[] = {
                .channel2 = IIO_MOD_QUATERNION,
                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
                .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+                                       BIT(IIO_CHAN_INFO_OFFSET) |
+                                       BIT(IIO_CHAN_INFO_SCALE) |
                                        BIT(IIO_CHAN_INFO_HYSTERESIS)
        }
 };
@@ -80,6 +86,15 @@ static int dev_rot_read_raw(struct iio_dev *indio_dev,
                } else
                        ret_type = -EINVAL;
                break;
+       case IIO_CHAN_INFO_SCALE:
+               vals[0] = rot_state->scale_pre_decml;
+               vals[1] = rot_state->scale_post_decml;
+               return rot_state->scale_precision;
+
+       case IIO_CHAN_INFO_OFFSET:
+               *vals = rot_state->value_offset;
+               return IIO_VAL_INT;
+
        case IIO_CHAN_INFO_SAMP_FREQ:
                ret_type = hid_sensor_read_samp_freq_value(
                        &rot_state->common_attributes, &vals[0], &vals[1]);
@@ -199,6 +214,11 @@ static int dev_rot_parse_report(struct platform_device *pdev,
        dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n",
                                st->quaternion.size);
 
+       st->scale_precision = hid_sensor_format_scale(
+                               hsdev->usage,
+                               &st->quaternion,
+                               &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,