iio: magnetometer: ak8975: Use devm_* APIs

This patch use devm_* APIs make driver simpler.

Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 14 insertions, 44 deletions

diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index 09ea5c481f4c..a29592cae301 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -165,7 +165,7 @@ static int ak8975_setup_irq(struct ak8975_data *data)
         else
                 irq = gpio_to_irq(data->eoc_gpio);
 
-        rc = request_irq(irq, ak8975_irq_handler,
+        rc = devm_request_irq(&client->dev, irq, ak8975_irq_handler,
                          IRQF_TRIGGER_RISING | IRQF_ONESHOT,
                          dev_name(&client->dev), data);
         if (rc < 0) {
@@ -520,21 +520,21 @@ static int ak8975_probe(struct i2c_client *client,
         /* We may not have a GPIO based IRQ to scan, that is fine, we will
            poll if so */
         if (gpio_is_valid(eoc_gpio)) {
-                err = gpio_request_one(eoc_gpio, GPIOF_IN, "ak_8975");
+                err = devm_gpio_request_one(&client->dev, eoc_gpio,
+                                                        GPIOF_IN, "ak_8975");
                 if (err < 0) {
                         dev_err(&client->dev,
                                 "failed to request GPIO %d, error %d\n",
                                                         eoc_gpio, err);
-                        goto exit;
+                        return err;
                 }
         }
 
         /* Register with IIO */
-        indio_dev = iio_device_alloc(sizeof(*data));
-        if (indio_dev == NULL) {
-                err = -ENOMEM;
-                goto exit_gpio;
-        }
+        indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+        if (indio_dev == NULL)
+                return -ENOMEM;
+
         data = iio_priv(indio_dev);
         i2c_set_clientdata(client, indio_dev);
 
@@ -549,17 +549,16 @@ static int ak8975_probe(struct i2c_client *client,
                 name = (char *) id->name;
         } else if (ACPI_HANDLE(&client->dev))
                 name = ak8975_match_acpi_device(&client->dev, &data->chipset);
-        else {
-                err = -ENOSYS;
-                goto exit_free_iio;
-        }
+        else
+                return -ENOSYS;
+
         dev_dbg(&client->dev, "Asahi compass chip %s\n", name);
 
         /* Perform some basic start-of-day setup of the device. */
         err = ak8975_setup(client);
         if (err < 0) {
                 dev_err(&client->dev, "AK8975 initialization fails\n");
-                goto exit_free_iio;
+                return err;
         }
 
         data->client = client;
@@ -571,37 +570,9 @@ static int ak8975_probe(struct i2c_client *client,
         indio_dev->info = &ak8975_info;
         indio_dev->modes = INDIO_DIRECT_MODE;
         indio_dev->name = name;
-        err = iio_device_register(indio_dev);
+        err = devm_iio_device_register(&client->dev, indio_dev);
         if (err < 0)
-                goto exit_free_iio;
-
-        return 0;
-
-exit_free_iio:
-        iio_device_free(indio_dev);
-        if (data->eoc_irq)
-                free_irq(data->eoc_irq, data);
-exit_gpio:
-        if (gpio_is_valid(eoc_gpio))
-                gpio_free(eoc_gpio);
-exit:
-        return err;
-}
-
-static int ak8975_remove(struct i2c_client *client)
-{
-        struct iio_dev *indio_dev = i2c_get_clientdata(client);
-        struct ak8975_data *data = iio_priv(indio_dev);
-
-        iio_device_unregister(indio_dev);
-
-        if (data->eoc_irq)
-                free_irq(data->eoc_irq, data);
-
-        if (gpio_is_valid(data->eoc_gpio))
-                gpio_free(data->eoc_gpio);
-
-        iio_device_free(indio_dev);
+                return err;
 
         return 0;
 }
@@ -628,7 +599,6 @@ static struct i2c_driver ak8975_driver = {
                 .acpi_match_table = ACPI_PTR(ak_acpi_match),
         },
         .probe          = ak8975_probe,
-        .remove         = ak8975_remove,
         .id_table       = ak8975_id,
 };
 module_i2c_driver(ak8975_driver);