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staging:iio:accel:kxsd9: allocate state with iio_dev and use iio_priv to access. 

V2: Actually allocate the storage.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jonathan Cameron 2011-06-27 13:17:56 +01:00 committed by Greg Kroah-Hartman
parent 83f0422dc6
commit ed0c012b85
1 changed files with 17 additions and 47 deletions
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64
drivers/staging/iio/accel/kxsd9.c
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@ -56,17 +56,15 @@
/**
* struct kxsd9_state - device related storage
* @buf_lock: protect the rx and tx buffers.
* @indio_dev: associated industrial IO device
* @us: spi device
* @rx: single rx buffer storage
* @tx: single tx buffer storage
**/
struct kxsd9_state {
struct mutex buf_lock;
struct iio_dev *indio_dev;
struct spi_device *us;
u8 *rx;
u8 *tx;
u8 rx[KXSD9_STATE_RX_SIZE] ____cacheline_aligned;
u8 tx[KXSD9_STATE_TX_SIZE];
};
/* This may want to move to mili g to allow for non integer ranges */
@ -77,7 +75,7 @@ static ssize_t kxsd9_read_scale(struct device *dev,
int ret;
ssize_t len = 0;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct kxsd9_state *st = indio_dev->dev_data;
struct kxsd9_state *st = iio_priv(indio_dev);
struct spi_transfer xfer = {
.bits_per_word = 8,
.len = 2,
@ -125,7 +123,7 @@ static ssize_t kxsd9_write_scale(struct device *dev,
struct spi_message msg;
int ret;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct kxsd9_state *st = indio_dev->dev_data;
struct kxsd9_state *st = iio_priv(indio_dev);
u8 val;
struct spi_transfer xfers[] = {
{
@ -190,7 +188,7 @@ static ssize_t kxsd9_read_accel(struct device *dev,
u16 val;
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct kxsd9_state *st = indio_dev->dev_data;
struct kxsd9_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[] = {
{
.bits_per_word = 8,
@ -308,43 +306,26 @@ static const struct iio_info kxsd9_info = {
static int __devinit kxsd9_probe(struct spi_device *spi)
{
struct iio_dev *indio_dev;
struct kxsd9_state *st;
int ret = 0;
st = kzalloc(sizeof(*st), GFP_KERNEL);
if (st == NULL) {
indio_dev = iio_allocate_device(sizeof(*st));
if (indio_dev == NULL) {
ret = -ENOMEM;
goto error_ret;
}
spi_set_drvdata(spi, st);
st->rx = kmalloc(sizeof(*st->rx)*KXSD9_STATE_RX_SIZE,
GFP_KERNEL);
if (st->rx == NULL) {
ret = -ENOMEM;
goto error_free_st;
}
st->tx = kmalloc(sizeof(*st->tx)*KXSD9_STATE_TX_SIZE,
GFP_KERNEL);
if (st->tx == NULL) {
ret = -ENOMEM;
goto error_free_rx;
}
st = iio_priv(indio_dev);
spi_set_drvdata(spi, indio_dev);
st->us = spi;
mutex_init(&st->buf_lock);
st->indio_dev = iio_allocate_device(0);
if (st->indio_dev == NULL) {
ret = -ENOMEM;
goto error_free_tx;
}
st->indio_dev->dev.parent = &spi->dev;
st->indio_dev->info = &kxsd9_info;
st->indio_dev->dev_data = (void *)(st);
st->indio_dev->modes = INDIO_DIRECT_MODE;
ret = iio_device_register(st->indio_dev);
indio_dev->dev.parent = &spi->dev;
indio_dev->info = &kxsd9_info;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = iio_device_register(indio_dev);
if (ret)
goto error_free_dev;
@ -355,25 +336,14 @@ static int __devinit kxsd9_probe(struct spi_device *spi)
return 0;
error_free_dev:
iio_free_device(st->indio_dev);
error_free_tx:
kfree(st->tx);
error_free_rx:
kfree(st->rx);
error_free_st:
kfree(st);
iio_free_device(indio_dev);
error_ret:
return ret;
}
static int __devexit kxsd9_remove(struct spi_device *spi)
{
struct kxsd9_state *st = spi_get_drvdata(spi);
iio_device_unregister(st->indio_dev);
kfree(st->tx);
kfree(st->rx);
kfree(st);
iio_device_unregister(spi_get_drvdata(spi));
return 0;
}