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staging:iio:meter:ade7753 allocate chip state with iio_dev; allocate buffers within state 

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>
This commit is contained in:
Jonathan Cameron 2011-06-27 13:07:48 +01:00 committed by Greg Kroah-Hartman
parent ba61bb18c2
commit bfccd4fb9a
2 changed files with 32 additions and 57 deletions
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79
drivers/staging/iio/meter/ade7753.c
View File

@ -29,7 +29,7 @@ static int ade7753_spi_write_reg_8(struct device *dev,
{
int ret;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
struct ade7753_state *st = iio_priv(indio_dev);
mutex_lock(&st->buf_lock);
st->tx[0] = ADE7753_WRITE_REG(reg_address);
@ -47,7 +47,7 @@ static int ade7753_spi_write_reg_16(struct device *dev,
{
int ret;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
struct ade7753_state *st = iio_priv(indio_dev);
mutex_lock(&st->buf_lock);
st->tx[0] = ADE7753_WRITE_REG(reg_address);
@ -64,7 +64,7 @@ static int ade7753_spi_read_reg_8(struct device *dev,
u8 *val)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
struct ade7753_state *st = iio_priv(indio_dev);
ssize_t ret;
ret = spi_w8r8(st->us, ADE7753_READ_REG(reg_address));
@ -83,7 +83,7 @@ static int ade7753_spi_read_reg_16(struct device *dev,
u16 *val)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
struct ade7753_state *st = iio_priv(indio_dev);
ssize_t ret;
ret = spi_w8r16(st->us, ADE7753_READ_REG(reg_address));
@ -105,7 +105,7 @@ static int ade7753_spi_read_reg_24(struct device *dev,
{
struct spi_message msg;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
struct ade7753_state *st = iio_priv(indio_dev);
int ret;
struct spi_transfer xfers[] = {
{
@ -369,10 +369,11 @@ static int ade7753_stop_device(struct device *dev)
return ade7753_spi_write_reg_16(dev, ADE7753_MODE, val);
}
static int ade7753_initial_setup(struct ade7753_state *st)
static int ade7753_initial_setup(struct iio_dev *indio_dev)
{
int ret;
struct device *dev = &st->indio_dev->dev;
struct device *dev = &indio_dev->dev;
struct ade7753_state *st = iio_priv(indio_dev);
/* use low spi speed for init */
st->us->mode = SPI_MODE_3;
@ -416,7 +417,7 @@ static ssize_t ade7753_write_frequency(struct device *dev,
size_t len)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7753_state *st = iio_dev_get_devdata(indio_dev);
struct ade7753_state *st = iio_priv(indio_dev);
unsigned long val;
int ret;
u16 reg, t;
@ -512,62 +513,44 @@ static const struct iio_info ade7753_info = {
static int __devinit ade7753_probe(struct spi_device *spi)
{
int ret, regdone = 0;
struct ade7753_state *st = kzalloc(sizeof *st, GFP_KERNEL);
if (!st) {
ret = -ENOMEM;
struct ade7753_state *st;
struct iio_dev *indio_dev;
/* setup the industrialio driver allocated elements */
indio_dev = iio_allocate_device(sizeof(*st));
if (indio_dev == NULL) {
ret = -ENOMEM;
goto error_ret;
}
/* this is only used for removal purposes */
spi_set_drvdata(spi, st);
spi_set_drvdata(spi, indio_dev);
/* Allocate the comms buffers */
st->rx = kzalloc(sizeof(*st->rx)*ADE7753_MAX_RX, GFP_KERNEL);
if (st->rx == NULL) {
ret = -ENOMEM;
goto error_free_st;
}
st->tx = kzalloc(sizeof(*st->tx)*ADE7753_MAX_TX, GFP_KERNEL);
if (st->tx == NULL) {
ret = -ENOMEM;
goto error_free_rx;
}
st = iio_priv(indio_dev);
st->us = spi;
mutex_init(&st->buf_lock);
/* setup the industrialio driver allocated elements */
st->indio_dev = iio_allocate_device(0);
if (st->indio_dev == NULL) {
ret = -ENOMEM;
goto error_free_tx;
}
st->indio_dev->name = spi->dev.driver->name;
st->indio_dev->dev.parent = &spi->dev;
st->indio_dev->info = &ade7753_info;
st->indio_dev->dev_data = (void *)(st);
st->indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->name = spi->dev.driver->name;
indio_dev->dev.parent = &spi->dev;
indio_dev->info = &ade7753_info;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = iio_device_register(st->indio_dev);
ret = iio_device_register(indio_dev);
if (ret)
goto error_free_dev;
regdone = 1;
/* Get the device into a sane initial state */
ret = ade7753_initial_setup(st);
ret = ade7753_initial_setup(indio_dev);
if (ret)
goto error_free_dev;
return 0;
error_free_dev:
if (regdone)
iio_device_unregister(st->indio_dev);
iio_device_unregister(indio_dev);
else
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;
}
@ -576,19 +559,13 @@ error_ret:
static int ade7753_remove(struct spi_device *spi)
{
int ret;
struct ade7753_state *st = spi_get_drvdata(spi);
struct iio_dev *indio_dev = st->indio_dev;
struct iio_dev *indio_dev = spi_get_drvdata(spi);
ret = ade7753_stop_device(&(indio_dev->dev));
if (ret)
goto err_ret;
iio_device_unregister(indio_dev);
kfree(st->tx);
kfree(st->rx);
kfree(st);
return 0;
err_ret:
return ret;

10
drivers/staging/iio/meter/ade7753.h
View File

@ -60,17 +60,15 @@
/**
* struct ade7753_state - device instance specific data
* @us: actual spi_device
* @indio_dev: industrial I/O device structure
* @tx: transmit buffer
* @rx: receive buffer
* @buf_lock: mutex to protect tx and rx
**/
struct ade7753_state {
struct spi_device *us;
struct iio_dev *indio_dev;
u8 *tx;
u8 *rx;
struct mutex buf_lock;
struct spi_device *us;
struct mutex buf_lock;
u8 tx[ADE7753_MAX_TX] ____cacheline_aligned;
u8 rx[ADE7753_MAX_RX];
};
#endif