[PATCH v2] iio: adc: max1027: Use device-managed APIs

[Chuhong Yuan]

Use device-managed APIs to simplify the code.

Signed-off-by: Chuhong Yuan <hsleste...@gmail.com>
---
Changes in v2:
  - Delete the debug print and _remove.

 drivers/iio/adc/max1027.c | 38 +++++++-------------------------------
 1 file changed, 7 insertions(+), 31 deletions(-)

diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index da84adfdb819..214883458582 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -427,8 +427,9 @@ static int max1027_probe(struct spi_device *spi)
                return -ENOMEM;
        }
 
-       ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
-                                        &max1027_trigger_handler, NULL);
+       ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
+                                       &iio_pollfunc_store_time,
+                                       &max1027_trigger_handler, NULL);
        if (ret < 0) {
                dev_err(&indio_dev->dev, "Failed to setup buffer\n");
                return ret;
@@ -439,7 +440,7 @@ static int max1027_probe(struct spi_device *spi)
        if (st->trig == NULL) {
                ret = -ENOMEM;
                dev_err(&indio_dev->dev, "Failed to allocate iio trigger\n");
-               goto fail_trigger_alloc;
+               return ret;
        }
 
        st->trig->ops = &max1027_trigger_ops;
@@ -454,7 +455,7 @@ static int max1027_probe(struct spi_device *spi)
                                        spi->dev.driver->name, st->trig);
        if (ret < 0) {
                dev_err(&indio_dev->dev, "Failed to allocate IRQ.\n");
-               goto fail_dev_register;
+               return ret;
        }
 
        /* Disable averaging */
@@ -462,34 +463,10 @@ static int max1027_probe(struct spi_device *spi)
        ret = spi_write(st->spi, &st->reg, 1);
        if (ret < 0) {
                dev_err(&indio_dev->dev, "Failed to configure averaging 
register\n");
-               goto fail_dev_register;
-       }
-
-       ret = iio_device_register(indio_dev);
-       if (ret < 0) {
-               dev_err(&indio_dev->dev, "Failed to register iio device\n");
-               goto fail_dev_register;
+               return ret;
        }
 
-       return 0;
-
-fail_dev_register:
-fail_trigger_alloc:
-       iio_triggered_buffer_cleanup(indio_dev);
-
-       return ret;
-}
-
-static int max1027_remove(struct spi_device *spi)
-{
-       struct iio_dev *indio_dev = spi_get_drvdata(spi);
-
-       pr_debug("%s: remove(spi = 0x%p)\n", __func__, spi);
-
-       iio_device_unregister(indio_dev);
-       iio_triggered_buffer_cleanup(indio_dev);
-
-       return 0;
+       return devm_iio_device_register(&spi->dev, indio_dev);
 }
 
 static struct spi_driver max1027_driver = {
@@ -498,7 +475,6 @@ static struct spi_driver max1027_driver = {
                .of_match_table = of_match_ptr(max1027_adc_dt_ids),
        },
        .probe          = max1027_probe,
-       .remove         = max1027_remove,
        .id_table       = max1027_id,
 };
 module_spi_driver(max1027_driver);
-- 
2.20.1