staging:iio:dds:ad9832: allocate chip state with iio_dev and use iio_priv to access.

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/ad9832.c b/drivers/staging/iio/dds/ad9832.c
index e8fe142..e3e61a4 100644 (file)
--- a/drivers/staging/iio/dds/ad9832.c
+++ b/drivers/staging/iio/dds/ad9832.c
@@ -77,7 +77,7 @@ static ssize_t ad9832_write(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct ad9832_state *st = dev_info->dev_data;
+       struct ad9832_state *st = iio_priv(dev_info);
        struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
        int ret;
        long val;
@@ -203,7 +203,9 @@ static const struct iio_info ad9832_info = {
 static int __devinit ad9832_probe(struct spi_device *spi)
 {
        struct ad9832_platform_data *pdata = spi->dev.platform_data;
+       struct iio_dev *indio_dev;
        struct ad9832_state *st;
+       struct regulator *reg;
        int ret;
 
        if (!pdata) {
@@ -211,35 +213,28 @@ static int __devinit ad9832_probe(struct spi_device *spi)
                return -ENODEV;
        }
 
-       st = kzalloc(sizeof(*st), GFP_KERNEL);
-       if (st == NULL) {
-               ret = -ENOMEM;
-               goto error_ret;
-       }
-
-       st->reg = regulator_get(&spi->dev, "vcc");
-       if (!IS_ERR(st->reg)) {
-               ret = regulator_enable(st->reg);
+       reg = regulator_get(&spi->dev, "vcc");
+       if (!IS_ERR(reg)) {
+               ret = regulator_enable(reg);
                if (ret)
                        goto error_put_reg;
        }
 
-       st->mclk = pdata->mclk;
-
-       spi_set_drvdata(spi, st);
-       st->spi = spi;
-
-       st->indio_dev = iio_allocate_device(0);
-       if (st->indio_dev == NULL) {
+       indio_dev = iio_allocate_device(sizeof(*st));
+       if (indio_dev == NULL) {
                ret = -ENOMEM;
                goto error_disable_reg;
        }
+       spi_set_drvdata(spi, indio_dev);
+       st = iio_priv(indio_dev);
+       st->reg = reg;
+       st->mclk = pdata->mclk;
+       st->spi = spi;
 
-       st->indio_dev->dev.parent = &spi->dev;
-       st->indio_dev->name = spi_get_device_id(spi)->name;
-       st->indio_dev->info = &ad9832_info;
-       st->indio_dev->dev_data = (void *) st;
-       st->indio_dev->modes = INDIO_DIRECT_MODE;
+       indio_dev->dev.parent = &spi->dev;
+       indio_dev->name = spi_get_device_id(spi)->name;
+       indio_dev->info = &ad9832_info;
+       indio_dev->modes = INDIO_DIRECT_MODE;
 
        /* Setup default messages */
 
@@ -310,35 +305,35 @@ static int __devinit ad9832_probe(struct spi_device *spi)
        if (ret)
                goto error_free_device;
 
-       ret = iio_device_register(st->indio_dev);
+       ret = iio_device_register(indio_dev);
        if (ret)
                goto error_free_device;
 
        return 0;
 
 error_free_device:
-       iio_free_device(st->indio_dev);
+       iio_free_device(indio_dev);
 error_disable_reg:
-       if (!IS_ERR(st->reg))
-               regulator_disable(st->reg);
+       if (!IS_ERR(reg))
+               regulator_disable(reg);
 error_put_reg:
-       if (!IS_ERR(st->reg))
-               regulator_put(st->reg);
-       kfree(st);
-error_ret:
+       if (!IS_ERR(reg))
+               regulator_put(reg);
+
        return ret;
 }
 
 static int __devexit ad9832_remove(struct spi_device *spi)
 {
-       struct ad9832_state *st = spi_get_drvdata(spi);
-
-       iio_device_unregister(st->indio_dev);
-       if (!IS_ERR(st->reg)) {
-               regulator_disable(st->reg);
-               regulator_put(st->reg);
+       struct iio_dev *indio_dev = spi_get_drvdata(spi);
+       struct ad9832_state *st = iio_priv(indio_dev);
+       struct regulator *reg = st->reg;
+
+       iio_device_unregister(indio_dev);
+       if (!IS_ERR(reg)) {
+               regulator_disable(reg);
+               regulator_put(reg);
        }
-       kfree(st);
        return 0;
 }
 

diff --git a/drivers/staging/iio/dds/ad9832.h b/drivers/staging/iio/dds/ad9832.h
index 5d47454..c5b701f 100644 (file)
--- a/drivers/staging/iio/dds/ad9832.h
+++ b/drivers/staging/iio/dds/ad9832.h
@@ -57,7 +57,6 @@
 
 /**
  * struct ad9832_state - driver instance specific data
- * @indio_dev:         the industrial I/O device
  * @spi:               spi_device
  * @reg:               supply regulator
  * @mclk:              external master clock
@@ -76,7 +75,6 @@
  */
 
 struct ad9832_state {
-       struct iio_dev                  *indio_dev;
        struct spi_device               *spi;
        struct regulator                *reg;
        unsigned long                   mclk;