2 files changed, 25 insertions, 0 deletions

diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index 46f4480035bc..ad2b8692ad77 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -291,6 +291,28 @@ err_free:
 }
 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 
+int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
+                                u32 report_id, int field_index, u32 usage_id)
+{
+        struct hid_report *report;
+        struct hid_field *field;
+        int i;
+
+        report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
+        if (!report || (field_index >= report->maxfield))
+                goto done_proc;
+
+        field = report->field[field_index];
+        for (i = 0; i < field->maxusage; ++i) {
+                if (field->usage[i].hid == usage_id)
+                        return field->usage[i].usage_index;
+        }
+
+done_proc:
+        return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
+
 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
                                 u8 type,
                                 u32 usage_id,
diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h
index b914ca3f57ba..205eba0326af 100644
--- a/include/linux/hid-sensor-hub.h
+++ b/include/linux/hid-sensor-hub.h
@@ -218,4 +218,7 @@ int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
 int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
                                         int *val1, int *val2);
 
+int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
+                                u32 report_id, int field_index, u32 usage_id);
+
 #endif