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authorSong Hongyan <hongyan.song@intel.com>2017-05-07 13:24:26 +0300
committerJonathan Cameron <jic23@kernel.org>2017-05-07 14:22:36 +0300
commita78587d338d084037b0ea6687508f207d8dec2fb (patch)
tree43f2428537d50c344174aba0d3ec9feb87561a77 /drivers/iio/orientation
parent00907c7a3282053dd4782e02c3101809608e7ea7 (diff)
downloadlinux-a78587d338d084037b0ea6687508f207d8dec2fb.tar.xz
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>
Diffstat (limited to 'drivers/iio/orientation')
-rw-r--r--drivers/iio/orientation/hid-sensor-rotation.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/iio/orientation/hid-sensor-rotation.c b/drivers/iio/orientation/hid-sensor-rotation.c
index 60d3517a78af..e9fa86c87db5 100644
--- 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,