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-rw-r--r--drivers/hid/hid-sensor-hub.c22
-rw-r--r--include/linux/hid-sensor-hub.h3
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