Input: auo-pixcir-ts - switch to using managed resources
This simplifies error unwinding and device teardown.
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/touchscreen/auo-pixcir-ts.c b/drivers/input/touchscreen/auo-pixcir-ts.c
index dfa6d54..d3f9f6b 100644
--- a/drivers/input/touchscreen/auo-pixcir-ts.c
+++ b/drivers/input/touchscreen/auo-pixcir-ts.c
@@ -533,13 +533,21 @@
}
#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 @@
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;
@@ -626,74 +604,72 @@
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;
}
static const struct i2c_device_id auo_pixcir_idtable[] = {
@@ -718,7 +694,6 @@
.of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable),
},
.probe = auo_pixcir_probe,
- .remove = auo_pixcir_remove,
.id_table = auo_pixcir_idtable,
};