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staging:iio:dac:ad5446: allocate chip state with iio_dev and use iio_priv for access.

Browse Source 
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 13:07:33 +01:00 committed by Greg Kroah-Hartman
parent a3684ded4f
commit 86729fc46f
2 changed files with 39 additions and 47 deletions
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84
drivers/staging/iio/dac/ad5446.c
View File

@ -68,7 +68,7 @@ static ssize_t ad5446_write(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad5446_state *st = dev_info->dev_data;
struct ad5446_state *st = iio_priv(dev_info);
int ret;
long val;
@ -98,7 +98,7 @@ static ssize_t ad5446_show_scale(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad5446_state *st = iio_dev_get_devdata(dev_info);
struct ad5446_state *st = iio_priv(dev_info);
/* Corresponds to Vref / 2^(bits) */
unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
@ -111,7 +111,7 @@ static ssize_t ad5446_write_powerdown_mode(struct device *dev,
const char *buf, size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad5446_state *st = dev_info->dev_data;
struct ad5446_state *st = iio_priv(dev_info);
if (sysfs_streq(buf, "1kohm_to_gnd"))
st->pwr_down_mode = MODE_PWRDWN_1k;
@ -129,7 +129,7 @@ static ssize_t ad5446_read_powerdown_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad5446_state *st = dev_info->dev_data;
struct ad5446_state *st = iio_priv(dev_info);
char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};
@ -141,7 +141,7 @@ static ssize_t ad5446_read_dac_powerdown(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad5446_state *st = dev_info->dev_data;
struct ad5446_state *st = iio_priv(dev_info);
return sprintf(buf, "%d\n", st->pwr_down);
}
@ -151,7 +151,7 @@ static ssize_t ad5446_write_dac_powerdown(struct device *dev,
const char *buf, size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad5446_state *st = dev_info->dev_data;
struct ad5446_state *st = iio_priv(dev_info);
unsigned long readin;
int ret;
@ -201,7 +201,7 @@ static mode_t ad5446_attr_is_visible(struct kobject *kobj,
{
struct device *dev = container_of(kobj, struct device, kobj);
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad5446_state *st = iio_dev_get_devdata(dev_info);
struct ad5446_state *st = iio_priv(dev_info);
mode_t mode = attr->mode;
@ -342,42 +342,37 @@ static const struct iio_info ad5446_info = {
static int __devinit ad5446_probe(struct spi_device *spi)
{
struct ad5446_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;
}
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);
}
st->chip_info =
&ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data];
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;
}
st = iio_priv(indio_dev);
st->chip_info =
&ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data];
spi_set_drvdata(spi, indio_dev);
st->reg = reg;
st->spi = spi;
/* Estabilish that the iio_dev is a child of the spi device */
st->indio_dev->dev.parent = &spi->dev;
st->indio_dev->name = spi_get_device_id(spi)->name;
st->indio_dev->info = &ad5446_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 = &ad5446_info;
indio_dev->modes = INDIO_DIRECT_MODE;
/* Setup default message */
@ -404,36 +399,35 @@ static int __devinit ad5446_probe(struct spi_device *spi)
"reference voltage unspecified\n");
}
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 ad5446_remove(struct spi_device *spi)
{
struct ad5446_state *st = spi_get_drvdata(spi);
struct iio_dev *indio_dev = st->indio_dev;
struct iio_dev *indio_dev = spi_get_drvdata(spi);
struct ad5446_state *st = iio_priv(indio_dev);
struct regulator *reg = st->reg;
iio_device_unregister(indio_dev);
if (!IS_ERR(st->reg)) {
regulator_disable(st->reg);
regulator_put(st->reg);
if (!IS_ERR(reg)) {
regulator_disable(reg);
regulator_put(reg);
}
kfree(st);
return 0;
}

2
drivers/staging/iio/dac/ad5446.h
View File

@ -33,7 +33,6 @@
/**
* struct ad5446_state - driver instance specific data
* @indio_dev: the industrial I/O device
* @spi: spi_device
* @chip_info: chip model specific constants, available modes etc
* @reg: supply regulator
@ -45,7 +44,6 @@
*/
struct ad5446_state {
struct iio_dev *indio_dev;
struct spi_device *spi;
const struct ad5446_chip_info *chip_info;
struct regulator *reg;