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staging:iio:adc:ad7745 allocate chip state with iio_dev and use iio_priv to access. 

Also remove the iio_dev pointer from chip state as never needed.

V2: Actually allocate the space for iio_priv data.

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 13:07:25 +01:00 committed by Greg Kroah-Hartman
parent 744e4a6b85
commit febafb94d6
1 changed files with 35 additions and 44 deletions
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79
drivers/staging/iio/adc/ad7745.c
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@ -54,7 +54,6 @@
struct ad774x_chip_info {
struct i2c_client *client;
struct iio_dev *indio_dev;
bool inter;
u16 cap_offs; /* Capacitive offset */
u16 cap_gain; /* Capacitive gain calibration */
@ -169,7 +168,7 @@ static ssize_t ad774x_show_conversion_mode(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
return sprintf(buf, "%s\n", chip->conversion_mode);
}
@ -180,7 +179,7 @@ static ssize_t ad774x_store_conversion_mode(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
u8 cfg;
int i;
@ -210,7 +209,7 @@ static ssize_t ad774x_show_dac_value(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
u8 data;
@ -225,7 +224,7 @@ static ssize_t ad774x_store_dac_value(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
unsigned long data;
int ret;
@ -256,7 +255,7 @@ static ssize_t ad774x_show_cap_setup(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
return sprintf(buf, "0x%02x\n", chip->cap_setup);
}
@ -267,7 +266,7 @@ static ssize_t ad774x_store_cap_setup(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
unsigned long data;
int ret;
@ -291,7 +290,7 @@ static ssize_t ad774x_show_vt_setup(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
return sprintf(buf, "0x%02x\n", chip->vt_setup);
}
@ -302,7 +301,7 @@ static ssize_t ad774x_store_vt_setup(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
unsigned long data;
int ret;
@ -326,7 +325,7 @@ static ssize_t ad774x_show_exec_setup(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
return sprintf(buf, "0x%02x\n", chip->exec_setup);
}
@ -337,7 +336,7 @@ static ssize_t ad774x_store_exec_setup(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
unsigned long data;
int ret;
@ -361,7 +360,7 @@ static ssize_t ad774x_show_volt_gain(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
return sprintf(buf, "%d\n", chip->volt_gain);
}
@ -372,7 +371,7 @@ static ssize_t ad774x_store_volt_gain(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
unsigned long data;
int ret;
@ -397,7 +396,7 @@ static ssize_t ad774x_show_cap_data(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
unsigned long data;
char tmp[3];
@ -414,7 +413,7 @@ static ssize_t ad774x_show_vt_data(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
unsigned long data;
char tmp[3];
@ -431,7 +430,7 @@ static ssize_t ad774x_show_cap_offs(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
return sprintf(buf, "%d\n", chip->cap_offs);
}
@ -442,7 +441,7 @@ static ssize_t ad774x_store_cap_offs(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
unsigned long data;
int ret;
@ -467,7 +466,7 @@ static ssize_t ad774x_show_cap_gain(struct device *dev,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
return sprintf(buf, "%d\n", chip->cap_gain);
}
@ -478,7 +477,7 @@ static ssize_t ad774x_store_cap_gain(struct device *dev,
size_t len)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad774x_chip_info *chip = dev_info->dev_data;
struct ad774x_chip_info *chip = iio_priv(dev_info);
unsigned long data;
int ret;
@ -534,7 +533,7 @@ static const struct attribute_group ad774x_attribute_group = {
static irqreturn_t ad774x_event_handler(int irq, void *private)
{
struct iio_dev *indio_dev = private;
struct ad774x_chip_info *chip = iio_dev_get_devdata(indio_dev);
struct ad774x_chip_info *chip = iio_priv(indio_dev);
u8 int_status;
ad774x_i2c_read(chip, AD774X_STATUS, &int_status, 1);
@ -579,31 +578,27 @@ static int __devinit ad774x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret = 0, regdone = 0;
struct ad774x_chip_info *chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL) {
struct ad774x_chip_info *chip;
struct iio_dev *indio_dev;
indio_dev = iio_allocate_device(sizeof(*chip));
if (indio_dev == NULL) {
ret = -ENOMEM;
goto error_ret;
}
chip = iio_priv(indio_dev);
/* this is only used for device removal purposes */
i2c_set_clientdata(client, chip);
i2c_set_clientdata(client, indio_dev);
chip->client = client;
chip->indio_dev = iio_allocate_device(0);
if (chip->indio_dev == NULL) {
ret = -ENOMEM;
goto error_free_chip;
}
/* Establish that the iio_dev is a child of the i2c device */
chip->indio_dev->name = id->name;
chip->indio_dev->dev.parent = &client->dev;
chip->indio_dev->info = &ad774x_info;
chip->indio_dev->dev_data = (void *)(chip);
chip->indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->name = id->name;
indio_dev->dev.parent = &client->dev;
indio_dev->info = &ad774x_info;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = iio_device_register(chip->indio_dev);
ret = iio_device_register(indio_dev);
if (ret)
goto error_free_dev;
regdone = 1;
@ -614,7 +609,7 @@ static int __devinit ad774x_probe(struct i2c_client *client,
&ad774x_event_handler,
IRQF_TRIGGER_FALLING,
"ad774x",
chip->indio_dev);
indio_dev);
if (ret)
goto error_free_dev;
}
@ -625,24 +620,20 @@ static int __devinit ad774x_probe(struct i2c_client *client,
error_free_dev:
if (regdone)
free_irq(client->irq, chip->indio_dev);
free_irq(client->irq, indio_dev);
else
iio_free_device(chip->indio_dev);
error_free_chip:
kfree(chip);
iio_free_device(indio_dev);
error_ret:
return ret;
}
static int __devexit ad774x_remove(struct i2c_client *client)
{
struct ad774x_chip_info *chip = i2c_get_clientdata(client);
struct iio_dev *indio_dev = chip->indio_dev;
struct iio_dev *indio_dev = i2c_get_clientdata(client);
if (client->irq)
free_irq(client->irq, indio_dev);
iio_device_unregister(indio_dev);
kfree(chip);
return 0;
}