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staging:iio:dac:ad5624r: allocate chip state with iio_dev and use iio_priv for 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>
This commit is contained in:
Jonathan Cameron 2011-06-27 13:07:31 +01:00 committed by Greg Kroah-Hartman
parent d3de2935b6
commit 3ff242055b
2 changed files with 37 additions and 44 deletions
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1
drivers/staging/iio/dac/ad5624r.h
View File

@ -53,7 +53,6 @@ struct ad5624r_chip_info {
*/
struct ad5624r_state {
struct iio_dev *indio_dev;
struct spi_device *us;
const struct ad5624r_chip_info *chip_info;
struct regulator *reg;

80
drivers/staging/iio/dac/ad5624r_spi.c
View File

@ -77,7 +77,7 @@ static ssize_t ad5624r_write_dac(struct device *dev,
long readin;
int ret;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
struct ad5624r_state *st = iio_priv(indio_dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
ret = strict_strtol(buf, 10, &readin);
@ -94,7 +94,7 @@ static ssize_t ad5624r_read_powerdown_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
struct ad5624r_state *st = iio_priv(indio_dev);
char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
@ -106,7 +106,7 @@ static ssize_t ad5624r_write_powerdown_mode(struct device *dev,
const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
struct ad5624r_state *st = iio_priv(indio_dev);
int ret;
if (sysfs_streq(buf, "1kohm_to_gnd"))
@ -126,7 +126,7 @@ static ssize_t ad5624r_read_dac_powerdown(struct device *dev,
char *buf)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
struct ad5624r_state *st = iio_priv(indio_dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
return sprintf(buf, "%d\n",
@ -140,7 +140,7 @@ static ssize_t ad5624r_write_dac_powerdown(struct device *dev,
long readin;
int ret;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
struct ad5624r_state *st = iio_priv(indio_dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
ret = strict_strtol(buf, 10, &readin);
@ -166,7 +166,7 @@ static ssize_t ad5624r_show_scale(struct device *dev,
char *buf)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5624r_state *st = iio_dev_get_devdata(indio_dev);
struct ad5624r_state *st = iio_priv(indio_dev);
/* Corresponds to Vref / 2^(bits) */
unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
@ -226,24 +226,26 @@ static const struct iio_info ad5624r_info = {
static int __devinit ad5624r_probe(struct spi_device *spi)
{
struct ad5624r_state *st;
struct iio_dev *indio_dev;
struct regulator *reg;
int ret, voltage_uv = 0;
st = kzalloc(sizeof(*st), GFP_KERNEL);
if (st == NULL) {
ret = -ENOMEM;
goto error_ret;
}
spi_set_drvdata(spi, st);
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;
voltage_uv = regulator_get_voltage(st->reg);
voltage_uv = regulator_get_voltage(reg);
}
indio_dev = iio_allocate_device(sizeof(*st));
if (indio_dev == NULL) {
ret = -ENOMEM;
goto error_disable_reg;
}
st = iio_priv(indio_dev);
st->reg = reg;
spi_set_drvdata(spi, indio_dev);
st->chip_info =
&ad5624r_chip_info_tbl[spi_get_device_id(spi)->driver_data];
@ -253,18 +255,13 @@ 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(0);
if (st->indio_dev == NULL) {
ret = -ENOMEM;
goto error_disable_reg;
}
st->indio_dev->dev.parent = &spi->dev;
st->indio_dev->name = spi_get_device_id(spi)->name;
st->indio_dev->info = &ad5624r_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->name = spi_get_device_id(spi)->name;
indio_dev->info = &ad5624r_info;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = iio_device_register(indio_dev);
if (ret)
goto error_free_dev;
@ -276,32 +273,29 @@ static int __devinit ad5624r_probe(struct spi_device *spi)
return 0;
error_free_dev:
iio_free_device(st->indio_dev);
iio_free_device(indio_dev);
error_disable_reg:
if (!IS_ERR(st->reg))
if (!IS_ERR(reg))
regulator_disable(st->reg);
error_put_reg:
if (!IS_ERR(st->reg))
regulator_put(st->reg);
if (!IS_ERR(reg))
regulator_put(reg);
kfree(st);
error_ret:
return ret;
}
static int __devexit ad5624r_remove(struct spi_device *spi)
{
struct ad5624r_state *st = spi_get_drvdata(spi);
struct iio_dev *indio_dev = spi_get_drvdata(spi);
struct ad5624r_state *st = iio_priv(indio_dev);
struct regulator *reg = st->reg;
iio_device_unregister(st->indio_dev);
if (!IS_ERR(st->reg)) {
regulator_disable(st->reg);
regulator_put(st->reg);
iio_device_unregister(indio_dev);
if (!IS_ERR(reg)) {
regulator_disable(reg);
regulator_put(reg);
}
kfree(st);
return 0;
}