/**
* bu21013_remove() - removes the i2c-client touchscreen driver
* @client: i2c client structure pointer
*
* This function uses to remove the i2c-client
* touchscreen driver and returns integer.
*/
static int __devexit bu21013_remove(struct i2c_client *client)
{
struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client);
bu21013_free_irq(bu21013_data);
bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin);
input_unregister_device(bu21013_data->in_dev);
kfree(bu21013_data);
device_init_wakeup(&client->dev, false);
return 0;
}
/**
* bu21013_remove() - removes the i2c-client touchscreen driver
* @client: i2c client structure pointer
*
* This function uses to remove the i2c-client
* touchscreen driver and returns integer.
*/
static int bu21013_remove(struct i2c_client *client)
{
struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client);
bu21013_free_irq(bu21013_data);
bu21013_cs_disable(bu21013_data);
input_unregister_device(bu21013_data->in_dev);
regulator_disable(bu21013_data->regulator);
regulator_put(bu21013_data->regulator);
kfree(bu21013_data);
device_init_wakeup(&client->dev, false);
return 0;
}
static int __devinit bu21013_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct bu21013_ts_data *bu21013_data;
struct input_dev *in_dev;
const struct bu21013_platform_device *pdata =
client->dev.platform_data;
int error;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&client->dev, "i2c smbus byte data not supported\n");
return -EIO;
}
if (!pdata) {
dev_err(&client->dev, "platform data not defined\n");
return -EINVAL;
}
bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL);
in_dev = input_allocate_device();
if (!bu21013_data || !in_dev) {
dev_err(&client->dev, "device memory alloc failed\n");
error = -ENOMEM;
goto err_free_mem;
}
bu21013_data->in_dev = in_dev;
bu21013_data->chip = pdata;
bu21013_data->client = client;
bu21013_data->regulator = regulator_get(&client->dev, "V-TOUCH");
if (IS_ERR(bu21013_data->regulator)) {
dev_err(&client->dev, "regulator_get failed\n");
error = PTR_ERR(bu21013_data->regulator);
goto err_free_mem;
}
error = regulator_enable(bu21013_data->regulator);
if (error < 0) {
dev_err(&client->dev, "regulator enable failed\n");
goto err_put_regulator;
}
bu21013_data->touch_stopped = false;
init_waitqueue_head(&bu21013_data->wait);
/* */
if (pdata->cs_en) {
error = pdata->cs_en(pdata->cs_pin);
if (error < 0) {
dev_err(&client->dev, "chip init failed\n");
goto err_disable_regulator;
}
}
/* */
error = bu21013_init_chip(bu21013_data);
if (error) {
dev_err(&client->dev, "error in bu21013 config\n");
goto err_cs_disable;
}
/* */
in_dev->name = DRIVER_TP;
in_dev->id.bustype = BUS_I2C;
in_dev->dev.parent = &client->dev;
__set_bit(EV_SYN, in_dev->evbit);
__set_bit(EV_KEY, in_dev->evbit);
__set_bit(EV_ABS, in_dev->evbit);
input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0,
pdata->touch_x_max, 0, 0);
input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0,
pdata->touch_y_max, 0, 0);
input_set_drvdata(in_dev, bu21013_data);
error = request_threaded_irq(pdata->irq, NULL, bu21013_gpio_irq,
IRQF_TRIGGER_FALLING | IRQF_SHARED,
DRIVER_TP, bu21013_data);
if (error) {
dev_err(&client->dev, "request irq %d failed\n", pdata->irq);
goto err_cs_disable;
}
error = input_register_device(in_dev);
if (error) {
dev_err(&client->dev, "failed to register input device\n");
goto err_free_irq;
}
device_init_wakeup(&client->dev, pdata->wakeup);
i2c_set_clientdata(client, bu21013_data);
return 0;
err_free_irq:
bu21013_free_irq(bu21013_data);
err_cs_disable:
pdata->cs_dis(pdata->cs_pin);
err_disable_regulator:
regulator_disable(bu21013_data->regulator);
err_put_regulator:
regulator_put(bu21013_data->regulator);
err_free_mem:
input_free_device(in_dev);
kfree(bu21013_data);
return error;
}
/**
* bu21013_probe() - initializes the i2c-client touchscreen driver
* @client: i2c client structure pointer
* @id: i2c device id pointer
*
* This function used to initializes the i2c-client touchscreen
* driver and returns integer.
*/
static int bu21013_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
const struct bu21013_platform_device *pdata =
dev_get_platdata(&client->dev);
struct bu21013_ts_data *bu21013_data;
struct input_dev *in_dev;
int error;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&client->dev, "i2c smbus byte data not supported\n");
return -EIO;
}
if (!pdata) {
pdata = bu21013_parse_dt(&client->dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
}
if (!gpio_is_valid(pdata->touch_pin)) {
dev_err(&client->dev, "invalid touch_pin supplied\n");
return -EINVAL;
}
bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL);
in_dev = input_allocate_device();
if (!bu21013_data || !in_dev) {
dev_err(&client->dev, "device memory alloc failed\n");
error = -ENOMEM;
goto err_free_mem;
}
bu21013_data->in_dev = in_dev;
bu21013_data->chip = pdata;
bu21013_data->client = client;
bu21013_data->irq = gpio_to_irq(pdata->touch_pin);
bu21013_data->regulator = regulator_get(&client->dev, "avdd");
if (IS_ERR(bu21013_data->regulator)) {
dev_err(&client->dev, "regulator_get failed\n");
error = PTR_ERR(bu21013_data->regulator);
goto err_free_mem;
}
error = regulator_enable(bu21013_data->regulator);
if (error < 0) {
dev_err(&client->dev, "regulator enable failed\n");
goto err_put_regulator;
}
bu21013_data->touch_stopped = false;
init_waitqueue_head(&bu21013_data->wait);
/* configure the gpio pins */
error = gpio_request_one(pdata->cs_pin, GPIOF_OUT_INIT_HIGH,
"touchp_reset");
if (error < 0) {
dev_err(&client->dev, "Unable to request gpio reset_pin\n");
goto err_disable_regulator;
}
/* configure the touch panel controller */
error = bu21013_init_chip(bu21013_data);
if (error) {
dev_err(&client->dev, "error in bu21013 config\n");
goto err_cs_disable;
}
/* register the device to input subsystem */
in_dev->name = DRIVER_TP;
in_dev->id.bustype = BUS_I2C;
in_dev->dev.parent = &client->dev;
__set_bit(EV_SYN, in_dev->evbit);
__set_bit(EV_KEY, in_dev->evbit);
__set_bit(EV_ABS, in_dev->evbit);
input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0,
pdata->touch_x_max, 0, 0);
input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0,
pdata->touch_y_max, 0, 0);
input_set_drvdata(in_dev, bu21013_data);
error = request_threaded_irq(bu21013_data->irq, NULL, bu21013_gpio_irq,
IRQF_TRIGGER_FALLING | IRQF_SHARED |
IRQF_ONESHOT,
DRIVER_TP, bu21013_data);
if (error) {
dev_err(&client->dev, "request irq %d failed\n",
bu21013_data->irq);
goto err_cs_disable;
}
error = input_register_device(in_dev);
if (error) {
dev_err(&client->dev, "failed to register input device\n");
goto err_free_irq;
}
device_init_wakeup(&client->dev, pdata->wakeup);
i2c_set_clientdata(client, bu21013_data);
return 0;
err_free_irq:
bu21013_free_irq(bu21013_data);
err_cs_disable:
bu21013_cs_disable(bu21013_data);
err_disable_regulator:
regulator_disable(bu21013_data->regulator);
err_put_regulator:
regulator_put(bu21013_data->regulator);
err_free_mem:
input_free_device(in_dev);
kfree(bu21013_data);
return error;
}
