staging:iio:dds:ad9951: allocate chip state with iio_dev

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/dds/ad9951.c b/drivers/staging/iio/dds/ad9951.c
index d4dfcd41d5f9b4e2e36cf7186c62a1e24254c90c..d361d1f125defdce789d7c6cb97467f86a4c5adb 100644 (file)
--- a/drivers/staging/iio/dds/ad9951.c
+++ b/drivers/staging/iio/dds/ad9951.c
@@ -51,7 +51,6 @@ struct ad9951_config {
 
 struct ad9951_state {
        struct mutex lock;
-       struct iio_dev *idev;
        struct spi_device *sdev;
 };
 
@@ -65,7 +64,7 @@ static ssize_t ad9951_set_parameter(struct device *dev,
        int ret;
        struct ad9951_config *config = (struct ad9951_config *)buf;
        struct iio_dev *idev = dev_get_drvdata(dev);
-       struct ad9951_state *st = idev->dev_data;
+       struct ad9951_state *st = iio_priv(idev);
 
        xfer.len = 3;
        xfer.tx_buf = &config->asf[0];
@@ -174,30 +173,25 @@ static const struct iio_info ad9951_info = {
 static int __devinit ad9951_probe(struct spi_device *spi)
 {
        struct ad9951_state *st;
+       struct iio_dev *idev;
        int ret = 0;
 
-       st = kzalloc(sizeof(*st), GFP_KERNEL);
-       if (st == NULL) {
+       idev = iio_allocate_device(sizeof(*st));
+       if (idev == NULL) {
                ret = -ENOMEM;
                goto error_ret;
        }
-       spi_set_drvdata(spi, st);
-
+       spi_set_drvdata(spi, idev);
+       st = iio_priv(idev);
        mutex_init(&st->lock);
        st->sdev = spi;
 
-       st->idev = iio_allocate_device(0);
-       if (st->idev == NULL) {
-               ret = -ENOMEM;
-               goto error_free_st;
-       }
-       st->idev->dev.parent = &spi->dev;
+       idev->dev.parent = &spi->dev;
 
-       st->idev->info = &ad9951_info;
-       st->idev->dev_data = (void *)(st);
-       st->idev->modes = INDIO_DIRECT_MODE;
+       idev->info = &ad9951_info;
+       idev->modes = INDIO_DIRECT_MODE;
 
-       ret = iio_device_register(st->idev);
+       ret = iio_device_register(idev);
        if (ret)
                goto error_free_dev;
        spi->max_speed_hz = 2000000;
@@ -208,19 +202,15 @@ static int __devinit ad9951_probe(struct spi_device *spi)
        return 0;
 
 error_free_dev:
-       iio_free_device(st->idev);
-error_free_st:
-       kfree(st);
+       iio_free_device(idev);
+
 error_ret:
        return ret;
 }
 
 static int __devexit ad9951_remove(struct spi_device *spi)
 {
-       struct ad9951_state *st = spi_get_drvdata(spi);
-
-       iio_device_unregister(st->idev);
-       kfree(st);
+       iio_device_unregister(spi_get_drvdata(spi));
 
        return 0;
 }