Add inhibit/uninhibit functions.
Signed-off-by: Jingle.wu <[email protected]>
---
drivers/input/mouse/elan_i2c_core.c | 83 +++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index 5f0d75a45c80..423f22fded59 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -329,6 +329,86 @@ static int elan_initialize(struct elan_tp_data *data, bool skip_reset)
return error;
}
+static int elan_reactivate(struct elan_tp_data *data)
+{
+ struct device *dev = &data->client->dev;
+ int error;
+
+ error = elan_set_power(data, true);
+ if (error)
+ dev_err(dev, "failed to restore power: %d\n", error);
+
+ error = data->ops->sleep_control(data->client, false);
+ if (error) {
+ dev_err(dev,
+ "failed to wake device up: %d\n", error);
+ return error;
+ }
+
+ return error;
+}
+
+static void elan_inhibit(struct input_dev *input_dev)
+{
+ struct elan_tp_data *data = input_get_drvdata(input_dev);
+ struct i2c_client *client = data->client;
+ int error;
+
+ dev_dbg(&client->dev, "inhibiting\n");
+ /*
+ * We are taking the mutex to make sure sysfs operations are
+ * complete before we attempt to bring the device into low[er]
+ * power mode.
+ */
+ error = mutex_lock_interruptible(&data->sysfs_mutex);
+ if (error)
+ return;
+
+ disable_irq(client->irq);
+
+ error = elan_set_power(data, false);
+ if (error)
+ enable_irq(client->irq);
+
+ mutex_unlock(&data->sysfs_mutex);
+
+}
+
+static void elan_close(struct input_dev *input_dev)
+{
+ if ((input_dev->users) && (!input_dev->inhibited))
+ elan_inhibit(input_dev);
+
+}
+
+static int elan_uninhibit(struct input_dev *input_dev)
+{
+ struct elan_tp_data *data = input_get_drvdata(input_dev);
+ struct i2c_client *client = data->client;
+ int error;
+
+ dev_dbg(&client->dev, "uninhibiting\n");
+ error = mutex_lock_interruptible(&data->sysfs_mutex);
+ if (error)
+ return error;
+
+ error = elan_reactivate(data);
+ if (error == 0)
+ enable_irq(client->irq);
+
+ mutex_unlock(&data->sysfs_mutex);
+
+ return error;
+}
+
+static int elan_open(struct input_dev *input_dev)
+{
+ if ((input_dev->users) && (input_dev->inhibited))
+ return elan_uninhibit(input_dev);
+
+ return 0;
+}
+
static int elan_query_device_info(struct elan_tp_data *data)
{
int error;
@@ -1175,6 +1255,9 @@ static int elan_setup_input_device(struct elan_tp_data *data)
0, ETP_FINGER_WIDTH * min_width, 0, 0);
}
+ input->open = elan_open;
+ input->close = elan_close;
+
data->input = input;
return 0;
--
2.34.1