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staging:iio:dac:max517: allocate chip state with iio_dev and use iio_priv to access it. 

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 13:07:35 +01:00 committed by Greg Kroah-Hartman
parent f5730d52ba
commit cada11fa20
1 changed files with 14 additions and 26 deletions
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40
drivers/staging/iio/dac/max517.c
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@ -59,7 +59,7 @@ static ssize_t max517_set_value(struct device *dev,
const char *buf, size_t count, int channel)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct max517_data *data = iio_dev_get_devdata(dev_info);
struct max517_data *data = iio_priv(dev_info);
struct i2c_client *client = data->client;
u8 outbuf[4]; /* 1x or 2x command + value */
int outbuf_size = 0;
@ -127,7 +127,7 @@ static ssize_t max517_show_scale(struct device *dev,
char *buf, int channel)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct max517_data *data = iio_dev_get_devdata(dev_info);
struct max517_data *data = iio_priv(dev_info);
/* Corresponds to Vref / 2^(bits) */
unsigned int scale_uv = (data->vref_mv[channel - 1] * 1000) >> 8;
@ -203,35 +203,28 @@ static int max517_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max517_data *data;
struct iio_dev *indio_dev;
struct max517_platform_data *platform_data = client->dev.platform_data;
int err;
data = kzalloc(sizeof(struct max517_data), GFP_KERNEL);
if (!data) {
indio_dev = iio_allocate_device(sizeof(*data));
if (indio_dev == NULL) {
err = -ENOMEM;
goto exit;
}
i2c_set_clientdata(client, data);
data = iio_priv(indio_dev);
i2c_set_clientdata(client, indio_dev);
data->client = client;
data->indio_dev = iio_allocate_device(0);
if (data->indio_dev == NULL) {
err = -ENOMEM;
goto exit_free_data;
}
/* establish that the iio_dev is a child of the i2c device */
data->indio_dev->dev.parent = &client->dev;
indio_dev->dev.parent = &client->dev;
/* reduced attribute set for MAX517 */
if (id->driver_data == ID_MAX517)
data->indio_dev->info = &max517_info;
indio_dev->info = &max517_info;
else
data->indio_dev->info = &max518_info;
data->indio_dev->dev_data = (void *)(data);
data->indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &max518_info;
indio_dev->modes = INDIO_DIRECT_MODE;
/*
* Reference voltage on MAX518 and default is 5V, else take vref_mv
@ -244,7 +237,7 @@ static int max517_probe(struct i2c_client *client,
data->vref_mv[1] = platform_data->vref_mv[1];
}
err = iio_device_register(data->indio_dev);
err = iio_device_register(indio_dev);
if (err)
goto exit_free_device;
@ -253,19 +246,14 @@ static int max517_probe(struct i2c_client *client,
return 0;
exit_free_device:
iio_free_device(data->indio_dev);
exit_free_data:
kfree(data);
iio_free_device(indio_dev);
exit:
return err;
}
static int max517_remove(struct i2c_client *client)
{
struct max517_data *data = i2c_get_clientdata(client);
iio_free_device(data->indio_dev);
kfree(data);
iio_free_device(i2c_get_clientdata(client));
return 0;
}