diff options
| -rw-r--r-- | drivers/hid/hid-sensor-hub.c | 22 | ||||
| -rw-r--r-- | include/linux/hid-sensor-hub.h | 3 |
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 |