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Input: auo-pixcir-ts - switch to using managed resources

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This simplifies error unwinding and device teardown.

Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2013-02-23 12:18:14 -08:00
parent d6b0c58048
commit bfc29e9595
1 changed files with 73 additions and 98 deletions
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171
drivers/input/touchscreen/auo-pixcir-ts.c
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@ -533,13 +533,21 @@ static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev)
}
#endif
static void auo_pixcir_reset(void *data)
{
struct auo_pixcir_ts *ts = data;
gpio_set_value(ts->pdata->gpio_rst, 0);
}
static int auo_pixcir_probe(struct i2c_client *client,
const struct i2c_device_id *id)
const struct i2c_device_id *id)
{
const struct auo_pixcir_ts_platdata *pdata;
struct auo_pixcir_ts *ts;
struct input_dev *input_dev;
int ret;
int version;
int error;
pdata = dev_get_platdata(&client->dev);
if (!pdata) {
@ -548,60 +556,30 @@ static int auo_pixcir_probe(struct i2c_client *client,
return PTR_ERR(pdata);
}
ts = kzalloc(sizeof(struct auo_pixcir_ts), GFP_KERNEL);
ts = devm_kzalloc(&client->dev,
sizeof(struct auo_pixcir_ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ret = gpio_request(pdata->gpio_int, "auo_pixcir_ts_int");
if (ret) {
dev_err(&client->dev, "request of gpio %d failed, %d\n",
pdata->gpio_int, ret);
goto err_gpio_int;
input_dev = devm_input_allocate_device(&client->dev);
if (!input_dev) {
dev_err(&client->dev, "could not allocate input device\n");
return -ENOMEM;
}
ret = gpio_direction_input(pdata->gpio_int);
if (ret) {
dev_err(&client->dev, "setting direction of gpio %d failed %d\n",
pdata->gpio_int, ret);
goto err_gpio_dir;
}
ret = gpio_request(pdata->gpio_rst, "auo_pixcir_ts_rst");
if (ret) {
dev_err(&client->dev, "request of gpio %d failed, %d\n",
pdata->gpio_rst, ret);
goto err_gpio_dir;
}
ret = gpio_direction_output(pdata->gpio_rst, 1);
if (ret) {
dev_err(&client->dev, "setting direction of gpio %d failed %d\n",
pdata->gpio_rst, ret);
goto err_gpio_rst;
}
msleep(200);
ts->pdata = pdata;
ts->client = client;
ts->input = input_dev;
ts->touch_ind_mode = 0;
ts->stopped = true;
init_waitqueue_head(&ts->wait);
snprintf(ts->phys, sizeof(ts->phys),
"%s/input0", dev_name(&client->dev));
input_dev = input_allocate_device();
if (!input_dev) {
dev_err(&client->dev, "could not allocate input device\n");
goto err_input_alloc;
}
ts->input = input_dev;
input_dev->name = "AUO-Pixcir touchscreen";
input_dev->phys = ts->phys;
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = &client->dev;
input_dev->open = auo_pixcir_input_open;
input_dev->close = auo_pixcir_input_close;
@ -626,73 +604,71 @@ static int auo_pixcir_probe(struct i2c_client *client,
AUO_PIXCIR_MAX_AREA, 0, 0);
input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION);
if (ret < 0)
goto err_fw_vers;
dev_info(&client->dev, "firmware version 0x%X\n", ret);
ret = auo_pixcir_int_config(ts, pdata->int_setting);
if (ret)
goto err_fw_vers;
input_set_drvdata(ts->input, ts);
ts->stopped = true;
ret = request_threaded_irq(client->irq, NULL, auo_pixcir_interrupt,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
input_dev->name, ts);
if (ret) {
dev_err(&client->dev, "irq %d requested failed\n", client->irq);
goto err_fw_vers;
error = devm_gpio_request_one(&client->dev, pdata->gpio_int,
GPIOF_DIR_IN, "auo_pixcir_ts_int");
if (error) {
dev_err(&client->dev, "request of gpio %d failed, %d\n",
pdata->gpio_int, error);
return error;
}
error = devm_gpio_request_one(&client->dev, pdata->gpio_rst,
GPIOF_DIR_OUT | GPIOF_INIT_HIGH,
"auo_pixcir_ts_rst");
if (error) {
dev_err(&client->dev, "request of gpio %d failed, %d\n",
pdata->gpio_rst, error);
return error;
}
error = devm_add_action(&client->dev, auo_pixcir_reset, ts);
if (error) {
auo_pixcir_reset(ts);
dev_err(&client->dev, "failed to register reset action, %d\n",
error);
return error;
}
msleep(200);
version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION);
if (version < 0) {
error = version;
return error;
}
dev_info(&client->dev, "firmware version 0x%X\n", version);
error = auo_pixcir_int_config(ts, pdata->int_setting);
if (error)
return error;
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, auo_pixcir_interrupt,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
input_dev->name, ts);
if (error) {
dev_err(&client->dev, "irq %d requested failed, %d\n",
client->irq, error);
return error;
}
/* stop device and put it into deep sleep until it is opened */
ret = auo_pixcir_stop(ts);
if (ret < 0)
goto err_input_register;
error = auo_pixcir_stop(ts);
if (error)
return error;
ret = input_register_device(input_dev);
if (ret) {
dev_err(&client->dev, "could not register input device\n");
goto err_input_register;
error = input_register_device(input_dev);
if (error) {
dev_err(&client->dev, "could not register input device, %d\n",
error);
return error;
}
i2c_set_clientdata(client, ts);
return 0;
err_input_register:
free_irq(client->irq, ts);
err_fw_vers:
input_free_device(input_dev);
err_input_alloc:
gpio_set_value(pdata->gpio_rst, 0);
err_gpio_rst:
gpio_free(pdata->gpio_rst);
err_gpio_dir:
gpio_free(pdata->gpio_int);
err_gpio_int:
kfree(ts);
return ret;
}
static int auo_pixcir_remove(struct i2c_client *client)
{
struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
free_irq(client->irq, ts);
input_unregister_device(ts->input);
gpio_set_value(pdata->gpio_rst, 0);
gpio_free(pdata->gpio_rst);
gpio_free(pdata->gpio_int);
kfree(ts);
return 0;
}
@ -718,7 +694,6 @@ static struct i2c_driver auo_pixcir_driver = {
.of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable),
},
.probe = auo_pixcir_probe,
.remove = auo_pixcir_remove,
.id_table = auo_pixcir_idtable,
};