staging:iio: Add ability to allocate private data space to iio_allocate_device

Suggested by Arnd Bergmann.  Note this will break ALL drivers that
are out of mainline.  The fix is trivial change of
iio_allocate_device() -> iio_allocate_device(0)
Sorry if this causes issues for any one!

V2: Include new drivers in the update

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

62 files changed, 89 insertions, 63 deletions

diff --git a/drivers/staging/iio/Documentation/device.txt b/drivers/staging/iio/Documentation/device.txt
index 69d9570f29f..c81e5172aec 100644
--- a/drivers/staging/iio/Documentation/device.txt
+++ b/drivers/staging/iio/Documentation/device.txt
@@ -8,7 +8,7 @@ The crucial structure for device drivers in iio is iio_dev.
 
 First allocate one using:
 
-struct iio_dev *indio_dev = iio_allocate_device();
+struct iio_dev *indio_dev = iio_allocate_device(0);
 
 Then fill in the following:
 
diff --git a/drivers/staging/iio/accel/adis16201_core.c b/drivers/staging/iio/accel/adis16201_core.c
index 79b785a0013..df1101cefc6 100644
--- a/drivers/staging/iio/accel/adis16201_core.c
+++ b/drivers/staging/iio/accel/adis16201_core.c
@@ -539,7 +539,7 @@ static int __devinit adis16201_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/accel/adis16203_core.c b/drivers/staging/iio/accel/adis16203_core.c
index b57f19087a9..e5a2a477b11 100644
--- a/drivers/staging/iio/accel/adis16203_core.c
+++ b/drivers/staging/iio/accel/adis16203_core.c
@@ -448,7 +448,7 @@ static int __devinit adis16203_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/accel/adis16204_core.c b/drivers/staging/iio/accel/adis16204_core.c
index cc15e40726f..97376aa2fc5 100644
--- a/drivers/staging/iio/accel/adis16204_core.c
+++ b/drivers/staging/iio/accel/adis16204_core.c
@@ -493,7 +493,7 @@ static int __devinit adis16204_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/accel/adis16209_core.c b/drivers/staging/iio/accel/adis16209_core.c
index e4ac956208a..d2fb9901dd6 100644
--- a/drivers/staging/iio/accel/adis16209_core.c
+++ b/drivers/staging/iio/accel/adis16209_core.c
@@ -488,7 +488,7 @@ static int __devinit adis16209_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/accel/adis16220_core.c b/drivers/staging/iio/accel/adis16220_core.c
index 1c1e98aee2d..0689e412ba8 100644
--- a/drivers/staging/iio/accel/adis16220_core.c
+++ b/drivers/staging/iio/accel/adis16220_core.c
@@ -572,7 +572,7 @@ static int __devinit adis16220_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/accel/adis16240_core.c b/drivers/staging/iio/accel/adis16240_core.c
index d11d164207e..31f64ae3bb0 100644
--- a/drivers/staging/iio/accel/adis16240_core.c
+++ b/drivers/staging/iio/accel/adis16240_core.c
@@ -485,7 +485,7 @@ static int __devinit adis16240_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/accel/kxsd9.c b/drivers/staging/iio/accel/kxsd9.c
index 79f57950ebe..431aa0f886f 100644
--- a/drivers/staging/iio/accel/kxsd9.c
+++ b/drivers/staging/iio/accel/kxsd9.c
@@ -329,7 +329,7 @@ static int __devinit kxsd9_probe(struct spi_device *spi)
 
         st->us = spi;
         mutex_init(&st->buf_lock);
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/accel/lis3l02dq_core.c b/drivers/staging/iio/accel/lis3l02dq_core.c
index 34f16a7cc3a..e11388ab457 100644
--- a/drivers/staging/iio/accel/lis3l02dq_core.c
+++ b/drivers/staging/iio/accel/lis3l02dq_core.c
@@ -805,7 +805,7 @@ static int __devinit lis3l02dq_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->help.indio_dev = iio_allocate_device();
+        st->help.indio_dev = iio_allocate_device(0);
         if (st->help.indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c
index 5b06dea6af2..6abf2b7e306 100644
--- a/drivers/staging/iio/accel/sca3000_core.c
+++ b/drivers/staging/iio/accel/sca3000_core.c
@@ -1339,7 +1339,7 @@ static int __devinit __sca3000_probe(struct spi_device *spi,
         mutex_init(&st->lock);
         st->info = &sca3000_spi_chip_info_tbl[variant];
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_rx;
diff --git a/drivers/staging/iio/adc/ad7150.c b/drivers/staging/iio/adc/ad7150.c
index 8555766109d..5a2991ac47e 100644
--- a/drivers/staging/iio/adc/ad7150.c
+++ b/drivers/staging/iio/adc/ad7150.c
@@ -778,7 +778,7 @@ static int __devinit ad7150_probe(struct i2c_client *client,
         chip->client = client;
         chip->name = id->name;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/adc/ad7152.c b/drivers/staging/iio/adc/ad7152.c
index fa7f8406230..163c30767b0 100644
--- a/drivers/staging/iio/adc/ad7152.c
+++ b/drivers/staging/iio/adc/ad7152.c
@@ -533,7 +533,7 @@ static int __devinit ad7152_probe(struct i2c_client *client,
         chip->client = client;
         chip->name = id->name;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/adc/ad7291.c b/drivers/staging/iio/adc/ad7291.c
index 34041a72aa5..976ae7f7710 100644
--- a/drivers/staging/iio/adc/ad7291.c
+++ b/drivers/staging/iio/adc/ad7291.c
@@ -926,7 +926,7 @@ static int __devinit ad7291_probe(struct i2c_client *client,
         chip->name = id->name;
         chip->command = AD7291_NOISE_DELAY | AD7291_T_SENSE_MASK;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/adc/ad7298_core.c b/drivers/staging/iio/adc/ad7298_core.c
index 2e9154e7d88..8b3a4904682 100644
--- a/drivers/staging/iio/adc/ad7298_core.c
+++ b/drivers/staging/iio/adc/ad7298_core.c
@@ -173,7 +173,7 @@ static int __devinit ad7298_probe(struct spi_device *spi)
         atomic_set(&st->protect_ring, 0);
         st->spi = spi;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/adc/ad7314.c b/drivers/staging/iio/adc/ad7314.c
index 8c17b1fe902..dffbec13632 100644
--- a/drivers/staging/iio/adc/ad7314.c
+++ b/drivers/staging/iio/adc/ad7314.c
@@ -229,7 +229,7 @@ static int __devinit ad7314_probe(struct spi_device *spi_dev)
         chip->spi_dev = spi_dev;
         chip->name = spi_dev->modalias;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/adc/ad7476_core.c b/drivers/staging/iio/adc/ad7476_core.c
index d263904b3d1..b16744cc549 100644
--- a/drivers/staging/iio/adc/ad7476_core.c
+++ b/drivers/staging/iio/adc/ad7476_core.c
@@ -184,7 +184,7 @@ static int __devinit ad7476_probe(struct spi_device *spi)
         atomic_set(&st->protect_ring, 0);
         st->spi = spi;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/adc/ad7606_core.c b/drivers/staging/iio/adc/ad7606_core.c
index 4c700f07fb8..7ef9a6f4807 100644
--- a/drivers/staging/iio/adc/ad7606_core.c
+++ b/drivers/staging/iio/adc/ad7606_core.c
@@ -447,7 +447,7 @@ struct ad7606_state *ad7606_probe(struct device *dev, int irq,
 
         atomic_set(&st->protect_ring, 0);
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/adc/ad7745.c b/drivers/staging/iio/adc/ad7745.c
index ab7ef8450ae..1373d23996b 100644
--- a/drivers/staging/iio/adc/ad7745.c
+++ b/drivers/staging/iio/adc/ad7745.c
@@ -635,7 +635,7 @@ static int __devinit ad774x_probe(struct i2c_client *client,
         chip->client = client;
         chip->name = id->name;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
index 0fd994fdee4..ab23c5cfdc2 100644
--- a/drivers/staging/iio/adc/ad7780.c
+++ b/drivers/staging/iio/adc/ad7780.c
@@ -221,7 +221,7 @@ static int __devinit ad7780_probe(struct spi_device *spi)
         spi_set_drvdata(spi, st);
         st->spi = spi;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/adc/ad7816.c b/drivers/staging/iio/adc/ad7816.c
index ad7415a6b8d..9e30d351cf4 100644
--- a/drivers/staging/iio/adc/ad7816.c
+++ b/drivers/staging/iio/adc/ad7816.c
@@ -418,7 +418,7 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev)
         }
         gpio_direction_input(chip->busy_pin);
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_gpio;
diff --git a/drivers/staging/iio/adc/ad7887_core.c b/drivers/staging/iio/adc/ad7887_core.c
index 5d85efab658..11c9fcfc3d0 100644
--- a/drivers/staging/iio/adc/ad7887_core.c
+++ b/drivers/staging/iio/adc/ad7887_core.c
@@ -153,7 +153,7 @@ static int __devinit ad7887_probe(struct spi_device *spi)
         atomic_set(&st->protect_ring, 0);
         st->spi = spi;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c
index f04e642e727..09d109ffb39 100644
--- a/drivers/staging/iio/adc/ad799x_core.c
+++ b/drivers/staging/iio/adc/ad799x_core.c
@@ -801,7 +801,7 @@ static int __devinit ad799x_probe(struct i2c_client *client,
         }
         st->client = client;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/adc/adt7310.c b/drivers/staging/iio/adc/adt7310.c
index 771a409ee94..7e66c42a712 100644
--- a/drivers/staging/iio/adc/adt7310.c
+++ b/drivers/staging/iio/adc/adt7310.c
@@ -794,7 +794,7 @@ static int __devinit adt7310_probe(struct spi_device *spi_dev)
         chip->spi_dev = spi_dev;
         chip->name = spi_dev->modalias;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/adc/adt7410.c b/drivers/staging/iio/adc/adt7410.c
index c345f27ec7f..7cc3feb0a17 100644
--- a/drivers/staging/iio/adc/adt7410.c
+++ b/drivers/staging/iio/adc/adt7410.c
@@ -764,7 +764,7 @@ static int __devinit adt7410_probe(struct i2c_client *client,
         chip->client = client;
         chip->name = id->name;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/adc/adt75.c b/drivers/staging/iio/adc/adt75.c
index aff4d31eb89..f247c4c789f 100644
--- a/drivers/staging/iio/adc/adt75.c
+++ b/drivers/staging/iio/adc/adt75.c
@@ -614,7 +614,7 @@ static int __devinit adt75_probe(struct i2c_client *client,
         chip->client = client;
         chip->name = id->name;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/adc/max1363_core.c b/drivers/staging/iio/adc/max1363_core.c
index de83c3b37a2..1703b2a74ac 100644
--- a/drivers/staging/iio/adc/max1363_core.c
+++ b/drivers/staging/iio/adc/max1363_core.c
@@ -1695,7 +1695,7 @@ static int __devinit max1363_probe(struct i2c_client *client,
         }
         st->client = client;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/addac/adt7316.c b/drivers/staging/iio/addac/adt7316.c
index 9b25f120544..d01cb4c2adb 100644
--- a/drivers/staging/iio/addac/adt7316.c
+++ b/drivers/staging/iio/addac/adt7316.c
@@ -2299,7 +2299,7 @@ int __devinit adt7316_probe(struct device *dev, struct adt7316_bus *bus,
         if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
                 chip->int_mask |= ADT7516_AIN_INT_MASK;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (chip->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_chip;
diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c
index 102bcc4e08e..fd4fa5497ce 100644
--- a/drivers/staging/iio/dac/ad5446.c
+++ b/drivers/staging/iio/dac/ad5446.c
@@ -373,7 +373,7 @@ static int __devinit ad5446_probe(struct spi_device *spi)
 
         st->spi = spi;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c
index 153c36e7f70..28ace3011db 100644
--- a/drivers/staging/iio/dac/ad5504.c
+++ b/drivers/staging/iio/dac/ad5504.c
@@ -321,7 +321,7 @@ static int __devinit ad5504_probe(struct spi_device *spi)
                 dev_warn(&spi->dev, "reference voltage unspecified\n");
 
         st->spi = spi;
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c
index a945b18ff84..cfb5828a377 100644
--- a/drivers/staging/iio/dac/ad5624r_spi.c
+++ b/drivers/staging/iio/dac/ad5624r_spi.c
@@ -260,7 +260,7 @@ static int __devinit ad5624r_probe(struct spi_device *spi)
                 st->vref_mv = st->chip_info->int_vref_mv;
 
         st->us = spi;
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c
index 545f1a6a270..c4a258dfa77 100644
--- a/drivers/staging/iio/dac/ad5791.c
+++ b/drivers/staging/iio/dac/ad5791.c
@@ -326,7 +326,7 @@ static int __devinit ad5791_probe(struct spi_device *spi)
         st->pwr_down = true;
 
         st->spi = spi;
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg_neg;
diff --git a/drivers/staging/iio/dac/max517.c b/drivers/staging/iio/dac/max517.c
index 7071f713604..3eb48b65c15 100644
--- a/drivers/staging/iio/dac/max517.c
+++ b/drivers/staging/iio/dac/max517.c
@@ -206,7 +206,7 @@ static int max517_probe(struct i2c_client *client,
 
         data->client = client;
 
-        data->indio_dev = iio_allocate_device();
+        data->indio_dev = iio_allocate_device(0);
         if (data->indio_dev == NULL) {
                 err = -ENOMEM;
                 goto exit_free_data;
diff --git a/drivers/staging/iio/dds/ad5930.c b/drivers/staging/iio/dds/ad5930.c
index f80039c5d53..5d98f93ca84 100644
--- a/drivers/staging/iio/dds/ad5930.c
+++ b/drivers/staging/iio/dds/ad5930.c
@@ -102,7 +102,7 @@ static int __devinit ad5930_probe(struct spi_device *spi)
         mutex_init(&st->lock);
         st->sdev = spi;
 
-        st->idev = iio_allocate_device();
+        st->idev = iio_allocate_device(0);
         if (st->idev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/dds/ad9832.c b/drivers/staging/iio/dds/ad9832.c
index 3e8491f60cf..9c6114f4976 100644
--- a/drivers/staging/iio/dds/ad9832.c
+++ b/drivers/staging/iio/dds/ad9832.c
@@ -236,7 +236,7 @@ static int __devinit ad9832_probe(struct spi_device *spi)
         spi_set_drvdata(spi, st);
         st->spi = spi;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/dds/ad9834.c b/drivers/staging/iio/dds/ad9834.c
index eb1a681874f..da5e302cf0f 100644
--- a/drivers/staging/iio/dds/ad9834.c
+++ b/drivers/staging/iio/dds/ad9834.c
@@ -349,7 +349,7 @@ static int __devinit ad9834_probe(struct spi_device *spi)
         st->spi = spi;
         st->devid = spi_get_device_id(spi)->driver_data;
 
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_disable_reg;
diff --git a/drivers/staging/iio/dds/ad9850.c b/drivers/staging/iio/dds/ad9850.c
index b259bfeaf5a..34bc0e6950d 100644
--- a/drivers/staging/iio/dds/ad9850.c
+++ b/drivers/staging/iio/dds/ad9850.c
@@ -88,7 +88,7 @@ static int __devinit ad9850_probe(struct spi_device *spi)
         mutex_init(&st->lock);
         st->sdev = spi;
 
-        st->idev = iio_allocate_device();
+        st->idev = iio_allocate_device(0);
         if (st->idev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/dds/ad9852.c b/drivers/staging/iio/dds/ad9852.c
index 594fb6a9433..899a72acd8f 100644
--- a/drivers/staging/iio/dds/ad9852.c
+++ b/drivers/staging/iio/dds/ad9852.c
@@ -237,7 +237,7 @@ static int __devinit ad9852_probe(struct spi_device *spi)
         mutex_init(&st->lock);
         st->sdev = spi;
 
-        st->idev = iio_allocate_device();
+        st->idev = iio_allocate_device(0);
         if (st->idev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/dds/ad9910.c b/drivers/staging/iio/dds/ad9910.c
index e8fb75cb66e..fddb6e7c7ed 100644
--- a/drivers/staging/iio/dds/ad9910.c
+++ b/drivers/staging/iio/dds/ad9910.c
@@ -372,7 +372,7 @@ static int __devinit ad9910_probe(struct spi_device *spi)
         mutex_init(&st->lock);
         st->sdev = spi;
 
-        st->idev = iio_allocate_device();
+        st->idev = iio_allocate_device(0);
         if (st->idev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/dds/ad9951.c b/drivers/staging/iio/dds/ad9951.c
index 57eddf6d471..a9e56c6e0fa 100644
--- a/drivers/staging/iio/dds/ad9951.c
+++ b/drivers/staging/iio/dds/ad9951.c
@@ -181,7 +181,7 @@ static int __devinit ad9951_probe(struct spi_device *spi)
         mutex_init(&st->lock);
         st->sdev = spi;
 
-        st->idev = iio_allocate_device();
+        st->idev = iio_allocate_device(0);
         if (st->idev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/gyro/adis16060_core.c b/drivers/staging/iio/gyro/adis16060_core.c
index ae53e71d1c2..e1f8a708c63 100644
--- a/drivers/staging/iio/gyro/adis16060_core.c
+++ b/drivers/staging/iio/gyro/adis16060_core.c
@@ -147,7 +147,7 @@ static int __devinit adis16060_r_probe(struct spi_device *spi)
         st->us_r = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/gyro/adis16080_core.c b/drivers/staging/iio/gyro/adis16080_core.c
index ef9e304a226..26af63fd7e3 100644
--- a/drivers/staging/iio/gyro/adis16080_core.c
+++ b/drivers/staging/iio/gyro/adis16080_core.c
@@ -140,7 +140,7 @@ static int __devinit adis16080_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/gyro/adis16130_core.c b/drivers/staging/iio/gyro/adis16130_core.c
index 70e2831f8fb..02fbe074824 100644
--- a/drivers/staging/iio/gyro/adis16130_core.c
+++ b/drivers/staging/iio/gyro/adis16130_core.c
@@ -191,7 +191,7 @@ static int __devinit adis16130_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/gyro/adis16260_core.c b/drivers/staging/iio/gyro/adis16260_core.c
index 69a29ec9310..26e3af47344 100644
--- a/drivers/staging/iio/gyro/adis16260_core.c
+++ b/drivers/staging/iio/gyro/adis16260_core.c
@@ -596,7 +596,7 @@ static int __devinit adis16260_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/gyro/adxrs450_core.c b/drivers/staging/iio/gyro/adxrs450_core.c
index d70bf684b7a..dcd88ff81a9 100644
--- a/drivers/staging/iio/gyro/adxrs450_core.c
+++ b/drivers/staging/iio/gyro/adxrs450_core.c
@@ -369,7 +369,7 @@ static int __devinit adxrs450_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
index 7127f26f8d2..80ef2cfe4bb 100644
--- a/drivers/staging/iio/iio.h
+++ b/drivers/staging/iio/iio.h
@@ -264,10 +264,25 @@ static inline void *iio_dev_get_devdata(struct iio_dev *d)
         return d->dev_data;
 }
 
+
+/* Can we make this smaller? */
+#define IIO_ALIGN L1_CACHE_BYTES
 /**
  * iio_allocate_device() - allocate an iio_dev from a driver
+ * @sizeof_priv: Space to allocate for private structure.
  **/
-struct iio_dev *iio_allocate_device(void);
+struct iio_dev *iio_allocate_device(int sizeof_priv);
+
+static inline void *iio_priv(const struct iio_dev *dev)
+{
+        return (char *)dev + ALIGN(sizeof(struct iio_dev), IIO_ALIGN);
+}
+
+static inline struct iio_dev *iio_priv_to_dev(void *priv)
+{
+        return (struct iio_dev *)((char *)priv -
+                                  ALIGN(sizeof(struct iio_dev), IIO_ALIGN));
+}
 
 /**
  * iio_free_device() - free an iio_dev from a driver
diff --git a/drivers/staging/iio/imu/adis16300_core.c b/drivers/staging/iio/imu/adis16300_core.c
index 7ad13f4d3d7..0734d4a7069 100644
--- a/drivers/staging/iio/imu/adis16300_core.c
+++ b/drivers/staging/iio/imu/adis16300_core.c
@@ -628,7 +628,7 @@ static int __devinit adis16300_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/imu/adis16350_core.c b/drivers/staging/iio/imu/adis16350_core.c
index cf7176bc766..208192470ec 100644
--- a/drivers/staging/iio/imu/adis16350_core.c
+++ b/drivers/staging/iio/imu/adis16350_core.c
@@ -617,7 +617,7 @@ static int __devinit adis16350_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/imu/adis16400_core.c b/drivers/staging/iio/imu/adis16400_core.c
index 540bde69cc3..a0b53ee887f 100644
--- a/drivers/staging/iio/imu/adis16400_core.c
+++ b/drivers/staging/iio/imu/adis16400_core.c
@@ -622,7 +622,7 @@ static int __devinit adis16400_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index 1795ee1e820..3a824146455 100644
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -720,9 +720,20 @@ static struct device_type iio_dev_type = {
         .release = iio_dev_release,
 };
 
-struct iio_dev *iio_allocate_device(void)
+struct iio_dev *iio_allocate_device(int sizeof_priv)
 {
-        struct iio_dev *dev = kzalloc(sizeof *dev, GFP_KERNEL);
+        struct iio_dev *dev;
+        size_t alloc_size;
+
+        alloc_size = sizeof(struct iio_dev);
+        if (sizeof_priv) {
+                alloc_size = ALIGN(alloc_size, IIO_ALIGN);
+                alloc_size += sizeof_priv;
+        }
+        /* ensure 32-byte alignment of whole construct ? */
+        alloc_size += IIO_ALIGN - 1;
+
+        dev = kzalloc(alloc_size, GFP_KERNEL);
 
         if (dev) {
                 dev->dev.type = &iio_dev_type;
diff --git a/drivers/staging/iio/light/isl29018.c b/drivers/staging/iio/light/isl29018.c
index f919cc1d35e..dfbc423a75e 100644
--- a/drivers/staging/iio/light/isl29018.c
+++ b/drivers/staging/iio/light/isl29018.c
@@ -492,7 +492,7 @@ static int __devinit isl29018_probe(struct i2c_client *client,
         if (err)
                 goto exit_free;
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (!chip->indio_dev) {
                 dev_err(&client->dev, "iio allocation fails\n");
                 goto exit_free;
diff --git a/drivers/staging/iio/light/tsl2563.c b/drivers/staging/iio/light/tsl2563.c
index dadae7527d5..35d94c6d8d8 100644
--- a/drivers/staging/iio/light/tsl2563.c
+++ b/drivers/staging/iio/light/tsl2563.c
@@ -857,7 +857,7 @@ static int __devinit tsl2563_probe(struct i2c_client *client,
 
         dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f);
 
-        chip->indio_dev = iio_allocate_device();
+        chip->indio_dev = iio_allocate_device(0);
         if (!chip->indio_dev)
                 goto fail1;
         chip->indio_dev->attrs = &tsl2563_group;
diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
index 1740843ee12..b87ccd5a2f5 100644
--- a/drivers/staging/iio/light/tsl2583.c
+++ b/drivers/staging/iio/light/tsl2583.c
@@ -847,7 +847,7 @@ static int __devinit taos_probe(struct i2c_client *clientp,
                 goto fail1;
         }
 
-        chip->iio_dev = iio_allocate_device();
+        chip->iio_dev = iio_allocate_device(0);
         if (!chip->iio_dev) {
                 ret = -ENOMEM;
                 dev_err(&clientp->dev, "iio allocation failed\n");
diff --git a/drivers/staging/iio/magnetometer/ak8975.c b/drivers/staging/iio/magnetometer/ak8975.c
index d71904a8370..2226b88882d 100644
--- a/drivers/staging/iio/magnetometer/ak8975.c
+++ b/drivers/staging/iio/magnetometer/ak8975.c
@@ -526,7 +526,7 @@ static int ak8975_probe(struct i2c_client *client,
         }
 
         /* Register with IIO */
-        data->indio_dev = iio_allocate_device();
+        data->indio_dev = iio_allocate_device(0);
         if (data->indio_dev == NULL) {
                 err = -ENOMEM;
                 goto exit_gpio;
diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c
index 51689177e00..d0676e99f15 100644
--- a/drivers/staging/iio/magnetometer/hmc5843.c
+++ b/drivers/staging/iio/magnetometer/hmc5843.c
@@ -552,7 +552,7 @@ static int hmc5843_probe(struct i2c_client *client,
         /* Initialize the HMC5843 chip */
         hmc5843_init_client(client);
 
-        data->indio_dev = iio_allocate_device();
+        data->indio_dev = iio_allocate_device(0);
         if (!data->indio_dev) {
                 err = -ENOMEM;
                 goto exit_free1;
diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c
index 8b86d82c3b3..d62d9e2f0d2 100644
--- a/drivers/staging/iio/meter/ade7753.c
+++ b/drivers/staging/iio/meter/ade7753.c
@@ -532,7 +532,7 @@ static int __devinit ade7753_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/meter/ade7754.c b/drivers/staging/iio/meter/ade7754.c
index 4272818e7dc..2d0b8cc0599 100644
--- a/drivers/staging/iio/meter/ade7754.c
+++ b/drivers/staging/iio/meter/ade7754.c
@@ -557,7 +557,7 @@ static int __devinit ade7754_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c
index b7634cb7aa4..8d37ef7eb95 100644
--- a/drivers/staging/iio/meter/ade7758_core.c
+++ b/drivers/staging/iio/meter/ade7758_core.c
@@ -737,7 +737,7 @@ static int __devinit ade7758_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c
index a9d3203b2e1..42b3b27520c 100644
--- a/drivers/staging/iio/meter/ade7759.c
+++ b/drivers/staging/iio/meter/ade7759.c
@@ -478,7 +478,7 @@ static int __devinit ade7759_probe(struct spi_device *spi)
         st->us = spi;
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/meter/ade7854.c b/drivers/staging/iio/meter/ade7854.c
index 866e585451f..d3f1df71c7f 100644
--- a/drivers/staging/iio/meter/ade7854.c
+++ b/drivers/staging/iio/meter/ade7854.c
@@ -568,7 +568,7 @@ int ade7854_probe(struct ade7854_state *st, struct device *dev)
         }
         mutex_init(&st->buf_lock);
         /* setup the industrialio driver allocated elements */
-        st->indio_dev = iio_allocate_device();
+        st->indio_dev = iio_allocate_device(0);
         if (st->indio_dev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_tx;
diff --git a/drivers/staging/iio/resolver/ad2s120x.c b/drivers/staging/iio/resolver/ad2s120x.c
index 8f497a23976..e0237ff8105 100644
--- a/drivers/staging/iio/resolver/ad2s120x.c
+++ b/drivers/staging/iio/resolver/ad2s120x.c
@@ -240,7 +240,7 @@ static int __devinit ad2s120x_probe(struct spi_device *spi)
         st->sample = pins[0];
         st->rdvel = pins[1];
 
-        st->idev = iio_allocate_device();
+        st->idev = iio_allocate_device(0);
         if (st->idev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index c12f64cc40d..dc7cae80cf3 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -800,7 +800,7 @@ static int __devinit ad2s1210_probe(struct spi_device *spi)
         st->res0 = pins[3];
         st->res1 = pins[4];
 
-        st->idev = iio_allocate_device();
+        st->idev = iio_allocate_device(0);
         if (st->idev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;
diff --git a/drivers/staging/iio/resolver/ad2s90.c b/drivers/staging/iio/resolver/ad2s90.c
index 4143535242d..e300adeefa8 100644
--- a/drivers/staging/iio/resolver/ad2s90.c
+++ b/drivers/staging/iio/resolver/ad2s90.c
@@ -90,7 +90,7 @@ static int __devinit ad2s90_probe(struct spi_device *spi)
         mutex_init(&st->lock);
         st->sdev = spi;
 
-        st->idev = iio_allocate_device();
+        st->idev = iio_allocate_device(0);
         if (st->idev == NULL) {
                 ret = -ENOMEM;
                 goto error_free_st;