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path: root/drivers/hid/hid-sensor-hub.c
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Diffstat (limited to 'drivers/hid/hid-sensor-hub.c')
-rw-r--r--drivers/hid/hid-sensor-hub.c45
1 files changed, 35 insertions, 10 deletions
diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index 10e1581022cf..88fc5aefcd96 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -465,6 +465,39 @@ static int sensor_hub_raw_event(struct hid_device *hdev,
return 1;
}
+int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
+{
+ int ret = 0;
+ struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
+
+ mutex_lock(&data->mutex);
+ if (!hsdev->ref_cnt) {
+ ret = hid_hw_open(hsdev->hdev);
+ if (ret) {
+ hid_err(hsdev->hdev, "failed to open hid device\n");
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ }
+ hsdev->ref_cnt++;
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sensor_hub_device_open);
+
+void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
+{
+ struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
+
+ mutex_lock(&data->mutex);
+ hsdev->ref_cnt--;
+ if (!hsdev->ref_cnt)
+ hid_hw_close(hsdev->hdev);
+ mutex_unlock(&data->mutex);
+}
+EXPORT_SYMBOL_GPL(sensor_hub_device_close);
+
static int sensor_hub_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
@@ -506,12 +539,6 @@ static int sensor_hub_probe(struct hid_device *hdev,
hid_err(hdev, "hw start failed\n");
return ret;
}
- ret = hid_hw_open(hdev);
- if (ret) {
- hid_err(hdev, "failed to open input interrupt pipe\n");
- goto err_stop_hw;
- }
-
INIT_LIST_HEAD(&sd->dyn_callback_list);
sd->hid_sensor_client_cnt = 0;
report_enum = &hdev->report_enum[HID_INPUT_REPORT];
@@ -520,7 +547,7 @@ static int sensor_hub_probe(struct hid_device *hdev,
if (dev_cnt > HID_MAX_PHY_DEVICES) {
hid_err(hdev, "Invalid Physical device count\n");
ret = -EINVAL;
- goto err_close;
+ goto err_stop_hw;
}
sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
sizeof(struct mfd_cell),
@@ -528,7 +555,7 @@ static int sensor_hub_probe(struct hid_device *hdev,
if (sd->hid_sensor_hub_client_devs == NULL) {
hid_err(hdev, "Failed to allocate memory for mfd cells\n");
ret = -ENOMEM;
- goto err_close;
+ goto err_stop_hw;
}
list_for_each_entry(report, &report_enum->report_list, list) {
hid_dbg(hdev, "Report id:%x\n", report->id);
@@ -565,8 +592,6 @@ err_free_names:
for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
kfree(sd->hid_sensor_hub_client_devs[i].name);
kfree(sd->hid_sensor_hub_client_devs);
-err_close:
- hid_hw_close(hdev);
err_stop_hw:
hid_hw_stop(hdev);