[PATCH 26/51] Input: atmel_mxt_ts - Move input device init into separate function

[Nick Dyer <nick.dyer@itdev.co.uk>]

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
---
 drivers/input/touchscreen/atmel_mxt_ts.c |  129 +++++++++++++++++-------------
 1 file changed, 75 insertions(+), 54 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 8632133..030ebc5 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -1728,73 +1728,39 @@ static int mxt_handle_pdata(struct mxt_data *data)
 	return 0;
 }
 
-static int mxt_probe(struct i2c_client *client,
-		const struct i2c_device_id *id)
+static int mxt_initialize_t9_input_device(struct mxt_data *data)
 {
-	struct mxt_data *data;
+	struct device *dev = &data->client->dev;
+	const struct mxt_platform_data *pdata = data->pdata;
 	struct input_dev *input_dev;
 	int error;
 	unsigned int num_mt_slots;
 	unsigned int mt_flags = 0;
 	int i;
 
-	data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
 	input_dev = input_allocate_device();
-	if (!data || !input_dev) {
-		dev_err(&client->dev, "Failed to allocate memory\n");
-		error = -ENOMEM;
-		goto err_free_mem;
+	if (!input_dev) {
+		dev_err(dev, "Failed to allocate memory\n");
+		return -ENOMEM;
 	}
 
 	input_dev->name = "Atmel maXTouch Touchscreen";
-	snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
-		 client->adapter->nr, client->addr);
-
 	input_dev->phys = data->phys;
-
 	input_dev->id.bustype = BUS_I2C;
-	input_dev->dev.parent = &client->dev;
+	input_dev->dev.parent = dev;
 	input_dev->open = mxt_input_open;
 	input_dev->close = mxt_input_close;
 
-	data->client = client;
-	data->input_dev = input_dev;
-	data->irq = client->irq;
-	i2c_set_clientdata(client, data);
-
-	error = mxt_handle_pdata(data);
-	if (error)
-		goto err_free_mem;
-
-	init_completion(&data->bl_completion);
-	init_completion(&data->reset_completion);
-	init_completion(&data->crc_completion);
-
-	error = request_threaded_irq(data->irq, NULL, mxt_interrupt,
-				     data->pdata->irqflags | IRQF_ONESHOT,
-				     client->name, data);
-	if (error) {
-		dev_err(&client->dev, "Failed to register interrupt\n");
-		goto err_free_pdata;
-	}
-
-	disable_irq(client->irq);
-
-	error = mxt_initialize(data);
-	if (error)
-		goto err_free_irq;
-
 	__set_bit(EV_ABS, input_dev->evbit);
-	__set_bit(EV_KEY, input_dev->evbit);
-	__set_bit(BTN_TOUCH, input_dev->keybit);
+	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
 
-	if (data->pdata->t19_num_keys) {
+	if (pdata->t19_num_keys) {
 		__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
 
-		for (i = 0; i < data->pdata->t19_num_keys; i++)
-			if (data->pdata->t19_keymap[i] != KEY_RESERVED)
+		for (i = 0; i < pdata->t19_num_keys; i++)
+			if (pdata->t19_keymap[i] != KEY_RESERVED)
 				input_set_capability(input_dev, EV_KEY,
-						data->pdata->t19_keymap[i]);
+						     pdata->t19_keymap[i]);
 
 		mt_flags |= INPUT_MT_POINTER;
 
@@ -1819,8 +1785,11 @@ static int mxt_probe(struct i2c_client *client,
 	/* For multi touch */
 	num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
 	error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
-	if (error)
-		goto err_free_object;
+	if (error) {
+		dev_err(dev, "Error %d initialising slots\n", error);
+		goto err_free_mem;
+	}
+
 	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
 			     0, MXT_MAX_AREA, 0, 0);
 	input_set_abs_params(input_dev, ABS_MT_POSITION_X,
@@ -1834,11 +1803,64 @@ static int mxt_probe(struct i2c_client *client,
 
 	error = input_register_device(input_dev);
 	if (error) {
-		dev_err(&client->dev, "Error %d registering input device\n",
-			error);
-		goto err_free_object;
+		dev_err(dev, "Error %d registering input device\n", error);
+		goto err_free_mem;
 	}
 
+	data->input_dev = input_dev;
+
+	return 0;
+
+err_free_mem:
+	input_free_device(input_dev);
+	return error;
+}
+
+static int mxt_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct mxt_data *data;
+	int error;
+
+	data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
+	if (!data) {
+		dev_err(&client->dev, "Failed to allocate memory\n");
+		return -ENOMEM;
+	}
+
+	snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
+		 client->adapter->nr, client->addr);
+
+	data->client = client;
+	data->irq = client->irq;
+	i2c_set_clientdata(client, data);
+
+	error = mxt_handle_pdata(data);
+	if (error)
+		goto err_free_mem;
+
+	init_completion(&data->bl_completion);
+	init_completion(&data->reset_completion);
+	init_completion(&data->crc_completion);
+
+	error = request_threaded_irq(data->irq, NULL, mxt_interrupt,
+				     data->pdata->irqflags | IRQF_ONESHOT,
+				     client->name, data);
+	if (error) {
+		dev_err(&client->dev, "Failed to register interrupt\n");
+		goto err_free_pdata;
+	}
+
+	disable_irq(data->irq);
+
+	error = mxt_initialize(data);
+	if (error)
+		goto err_free_irq;
+
+	error = mxt_initialize_t9_input_device(data);
+	if (error)
+		goto err_free_object;
+
 	error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
 	if (error) {
 		dev_err(&client->dev, "Failure %d creating sysfs group\n",
@@ -1849,8 +1871,8 @@ static int mxt_probe(struct i2c_client *client,
 	return 0;
 
 err_unregister_device:
-	input_unregister_device(input_dev);
-	input_dev = NULL;
+	input_unregister_device(data->input_dev);
+	data->input_dev = NULL;
 err_free_object:
 	kfree(data->object_table);
 err_free_irq:
@@ -1859,7 +1881,6 @@ err_free_pdata:
 	if (!dev_get_platdata(&data->client->dev))
 		kfree(data->pdata);
 err_free_mem:
-	input_free_device(input_dev);
 	kfree(data);
 	return error;
 }
-- 
1.7.10.4