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iio: hid-sensor-rotation: Add relative orientation sensor hid support 

Relative orientation(AG) sensor is a 6dof orientation sensor,
it depends on acceleration and gyroscope sensor data. It gives
a quaternion describing the orientation of the device relative
to an initial orientation. It is a standard HID sensor.

More information can be found in:
http://www.usb.org/developers/hidpage/HUTRR59_-_Usages_for_Wearables.pdf

Relative orientation(AG) sensor and dev rotation sensor have same
channels and share channel usage id. So the most of the code for
relative orientation sensor can be reused.

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>
hifive-unleashed-5.1
Song Hongyan 2017-05-07 18:24:24 +08:00 committed by Jonathan Cameron
parent b46c39a098
commit 9ff88edc5e
2 changed files with 21 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/iio/orientation/hid-sensor-rotation.c
View File

@ -218,7 +218,7 @@ static int dev_rot_parse_report(struct platform_device *pdev,
static int hid_dev_rot_probe(struct platform_device *pdev)
{
int ret;
static char *name = "dev_rotation";
static char *name;
struct iio_dev *indio_dev;
struct dev_rot_state *rot_state;
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
@ -234,8 +234,18 @@ static int hid_dev_rot_probe(struct platform_device *pdev)
rot_state->common_attributes.hsdev = hsdev;
rot_state->common_attributes.pdev = pdev;
ret = hid_sensor_parse_common_attributes(hsdev,
HID_USAGE_SENSOR_DEVICE_ORIENTATION,
switch (hsdev->usage) {
case HID_USAGE_SENSOR_DEVICE_ORIENTATION:
name = "dev_rotation";
break;
case HID_USAGE_SENSOR_RELATIVE_ORIENTATION:
name = "relative_orientation";
break;
default:
return -EINVAL;
}
ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage,
&rot_state->common_attributes);
if (ret) {
dev_err(&pdev->dev, "failed to setup common attributes\n");
@ -252,8 +262,7 @@ static int hid_dev_rot_probe(struct platform_device *pdev)
ret = dev_rot_parse_report(pdev, hsdev,
(struct iio_chan_spec *)indio_dev->channels,
HID_USAGE_SENSOR_DEVICE_ORIENTATION,
rot_state);
hsdev->usage, rot_state);
if (ret) {
dev_err(&pdev->dev, "failed to setup attributes\n");
return ret;
@ -288,8 +297,7 @@ static int hid_dev_rot_probe(struct platform_device *pdev)
rot_state->callbacks.send_event = dev_rot_proc_event;
rot_state->callbacks.capture_sample = dev_rot_capture_sample;
rot_state->callbacks.pdev = pdev;
ret = sensor_hub_register_callback(hsdev,
HID_USAGE_SENSOR_DEVICE_ORIENTATION,
ret = sensor_hub_register_callback(hsdev, hsdev->usage,
&rot_state->callbacks);
if (ret) {
dev_err(&pdev->dev, "callback reg failed\n");
@ -314,7 +322,7 @@ static int hid_dev_rot_remove(struct platform_device *pdev)
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct dev_rot_state *rot_state = iio_priv(indio_dev);
sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_DEVICE_ORIENTATION);
sensor_hub_remove_callback(hsdev, hsdev->usage);
iio_device_unregister(indio_dev);
hid_sensor_remove_trigger(&rot_state->common_attributes);
iio_triggered_buffer_cleanup(indio_dev);
@ -327,6 +335,10 @@ static const struct platform_device_id hid_dev_rot_ids[] = {
/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
.name = "HID-SENSOR-20008a",
},
{
/* Relative orientation(AG) sensor */
.name = "HID-SENSOR-20008e",
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids);

1
include/linux/hid-sensor-ids.h
View File

@ -90,6 +90,7 @@
#define HID_USAGE_SENSOR_ORIENT_TILT_Z 0x200481
#define HID_USAGE_SENSOR_DEVICE_ORIENTATION 0x20008A
#define HID_USAGE_SENSOR_RELATIVE_ORIENTATION 0x20008E
#define HID_USAGE_SENSOR_ORIENT_ROTATION_MATRIX 0x200482
#define HID_USAGE_SENSOR_ORIENT_QUATERNION 0x200483
#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX 0x200484