iio: adc: ad7791: Use devm_* APIs

devm_* APIs are device managed and make code simpler.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c
index 5e8d1da6887fb0de7d995f00daf6b7304f3f8860..c20203577d2d1e38da820299fba5aca0d10a0c37 100644 (file)
--- a/drivers/iio/adc/ad7791.c
+++ b/drivers/iio/adc/ad7791.c
@@ -361,21 +361,19 @@ static int ad7791_probe(struct spi_device *spi)
                return -ENXIO;
        }
 
-       indio_dev = iio_device_alloc(sizeof(*st));
+       indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
        if (!indio_dev)
                return -ENOMEM;
 
        st = iio_priv(indio_dev);
 
-       st->reg = regulator_get(&spi->dev, "refin");
-       if (IS_ERR(st->reg)) {
-               ret = PTR_ERR(st->reg);
-               goto err_iio_free;
-       }
+       st->reg = devm_regulator_get(&spi->dev, "refin");
+       if (IS_ERR(st->reg))
+               return PTR_ERR(st->reg);
 
        ret = regulator_enable(st->reg);
        if (ret)
-               goto error_put_reg;
+               return ret;
 
        st->info = &ad7791_chip_infos[spi_get_device_id(spi)->driver_data];
        ad_sd_init(&st->sd, indio_dev, spi, &ad7791_sigma_delta_info);
@@ -410,10 +408,6 @@ error_remove_trigger:
        ad_sd_cleanup_buffer_and_trigger(indio_dev);
 error_disable_reg:
        regulator_disable(st->reg);
-error_put_reg:
-       regulator_put(st->reg);
-err_iio_free:
-       iio_device_free(indio_dev);
 
        return ret;
 }
@@ -427,9 +421,6 @@ static int ad7791_remove(struct spi_device *spi)
        ad_sd_cleanup_buffer_and_trigger(indio_dev);
 
        regulator_disable(st->reg);
-       regulator_put(st->reg);
-
-       iio_device_free(indio_dev);
 
        return 0;
 }