Input: edt_ft5x06 - use devm_* functions where appropriate

Simplify the error path and remove() function by using devm_*
functions for requesting gpios and irq and allocating the input
device.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 26 insertions, 43 deletions

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index af0d68b703b7..412a85ec9ba5 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -623,8 +623,9 @@ static int edt_ft5x06_ts_reset(struct i2c_client *client,
 
         if (gpio_is_valid(reset_pin)) {
                 /* this pulls reset down, enabling the low active reset */
-                error = gpio_request_one(reset_pin, GPIOF_OUT_INIT_LOW,
-                                         "edt-ft5x06 reset");
+                error = devm_gpio_request_one(&client->dev, reset_pin,
+                                              GPIOF_OUT_INIT_LOW,
+                                              "edt-ft5x06 reset");
                 if (error) {
                         dev_err(&client->dev,
                                 "Failed to request GPIO %d as reset pin, error %d\n",
@@ -723,8 +724,8 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
                 return error;
 
         if (gpio_is_valid(pdata->irq_pin)) {
-                error = gpio_request_one(pdata->irq_pin,
-                                         GPIOF_IN, "edt-ft5x06 irq");
+                error = devm_gpio_request_one(&client->dev, pdata->irq_pin,
+                                              GPIOF_IN, "edt-ft5x06 irq");
                 if (error) {
                         dev_err(&client->dev,
                                 "Failed to request GPIO %d, error %d\n",
@@ -733,12 +734,16 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
                 }
         }
 
-        tsdata = kzalloc(sizeof(*tsdata), GFP_KERNEL);
-        input = input_allocate_device();
-        if (!tsdata || !input) {
+        tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
+        if (!tsdata) {
                 dev_err(&client->dev, "failed to allocate driver data.\n");
-                error = -ENOMEM;
-                goto err_free_mem;
+                return -ENOMEM;
+        }
+
+        input = devm_input_allocate_device(&client->dev);
+        if (!input) {
+                dev_err(&client->dev, "failed to allocate input device.\n");
+                return -ENOMEM;
         }
 
         mutex_init(&tsdata->mutex);
@@ -749,7 +754,7 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
         error = edt_ft5x06_ts_identify(client, tsdata->name, fw_version);
         if (error) {
                 dev_err(&client->dev, "touchscreen probe failed\n");
-                goto err_free_mem;
+                return error;
         }
 
         edt_ft5x06_ts_get_defaults(tsdata, pdata);
@@ -776,27 +781,30 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
         error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0);
         if (error) {
                 dev_err(&client->dev, "Unable to init MT slots.\n");
-                goto err_free_mem;
+                return error;
         }
 
         input_set_drvdata(input, tsdata);
         i2c_set_clientdata(client, tsdata);
 
-        error = request_threaded_irq(client->irq, NULL, edt_ft5x06_ts_isr,
-                                     IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-                                     client->name, tsdata);
+        error = devm_request_threaded_irq(&client->dev, client->irq,
+                                          NULL, edt_ft5x06_ts_isr,
+                                          IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+                                          client->name, tsdata);
         if (error) {
                 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
-                goto err_free_mem;
+                return error;
         }
 
         error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
         if (error)
-                goto err_free_irq;
+                return error;
 
         error = input_register_device(input);
-        if (error)
-                goto err_remove_attrs;
+        if (error) {
+                sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
+                return error;
+        }
 
         edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
         device_init_wakeup(&client->dev, 1);
@@ -806,40 +814,15 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
                 pdata->irq_pin, pdata->reset_pin);
 
         return 0;
-
-err_remove_attrs:
-        sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
-err_free_irq:
-        free_irq(client->irq, tsdata);
-err_free_mem:
-        input_free_device(input);
-        kfree(tsdata);
-
-        if (gpio_is_valid(pdata->irq_pin))
-                gpio_free(pdata->irq_pin);
-
-        return error;
 }
 
 static int edt_ft5x06_ts_remove(struct i2c_client *client)
 {
-        const struct edt_ft5x06_platform_data *pdata =
-                                                dev_get_platdata(&client->dev);
         struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
 
         edt_ft5x06_ts_teardown_debugfs(tsdata);
         sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
 
-        free_irq(client->irq, tsdata);
-        input_unregister_device(tsdata->input);
-
-        if (gpio_is_valid(pdata->irq_pin))
-                gpio_free(pdata->irq_pin);
-        if (gpio_is_valid(pdata->reset_pin))
-                gpio_free(pdata->reset_pin);
-
-        kfree(tsdata);
-
         return 0;
 }