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>

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index af0d68b..412a85e 100644 (file)
--- 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;
 }