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authorSong Hongyan <hongyan.song@intel.com>2017-05-07 13:24:24 +0300
committerJonathan Cameron <jic23@kernel.org>2017-05-07 14:22:27 +0300
commit9ff88edc5e7bad08bdd79a20f14533a5cf44b865 (patch)
treeee0ed45bbfea629c601713e99c0c7e207db11687 /drivers/iio/orientation
parentb46c39a09838bb87d412a6ad7427ea58bf99ae02 (diff)
downloadlinux-9ff88edc5e7bad08bdd79a20f14533a5cf44b865.tar.xz
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>
Diffstat (limited to 'drivers/iio/orientation')
-rw-r--r--drivers/iio/orientation/hid-sensor-rotation.c28
1 files changed, 20 insertions, 8 deletions
diff --git a/drivers/iio/orientation/hid-sensor-rotation.c b/drivers/iio/orientation/hid-sensor-rotation.c
index a97e802ca523..4d953c26325f 100644
--- a/drivers/iio/orientation/hid-sensor-rotation.c
+++ b/drivers/iio/orientation/hid-sensor-rotation.c
@@ -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);