staging:iio:adc:adt7410 allocate chip state with iio_dev and use iio_priv to 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>

diff --git a/drivers/staging/iio/adc/adt7410.c b/drivers/staging/iio/adc/adt7410.c
index c40a84f..76aa063 100644 (file)
--- a/drivers/staging/iio/adc/adt7410.c
+++ b/drivers/staging/iio/adc/adt7410.c
@@ -75,7 +75,6 @@
 
 struct adt7410_chip_info {
        struct i2c_client *client;
-       struct iio_dev *indio_dev;
        u8  config;
 };
 
@@ -144,7 +143,7 @@ static ssize_t adt7410_show_mode(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        u8 config;
 
        config = chip->config & ADT7410_MODE_MASK;
@@ -167,7 +166,7 @@ static ssize_t adt7410_store_mode(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        u16 config;
        int ret;
 
@@ -211,7 +210,7 @@ static ssize_t adt7410_show_resolution(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        int ret;
        int bits;
 
@@ -233,7 +232,7 @@ static ssize_t adt7410_store_resolution(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        unsigned long data;
        u16 config;
        int ret;
@@ -269,7 +268,7 @@ static ssize_t adt7410_show_id(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        u8 id;
        int ret;
 
@@ -319,7 +318,7 @@ static ssize_t adt7410_show_value(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        u8 status;
        u16 data;
        int ret, i = 0;
@@ -358,7 +357,7 @@ static const struct attribute_group adt7410_attribute_group = {
 static irqreturn_t adt7410_event_handler(int irq, void *private)
 {
        struct iio_dev *indio_dev = private;
-       struct adt7410_chip_info *chip = iio_dev_get_devdata(indio_dev);
+       struct adt7410_chip_info *chip = iio_priv(indio_dev);
        s64 timestamp = iio_get_time_ns();
        u8 status;
 
@@ -392,7 +391,7 @@ static ssize_t adt7410_show_event_mode(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        int ret;
 
        ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
@@ -411,7 +410,7 @@ static ssize_t adt7410_set_event_mode(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        u16 config;
        int ret;
 
@@ -444,7 +443,7 @@ static ssize_t adt7410_show_fault_queue(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        int ret;
 
        ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
@@ -460,7 +459,7 @@ static ssize_t adt7410_set_fault_queue(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        unsigned long data;
        int ret;
        u8 config;
@@ -490,7 +489,7 @@ static inline ssize_t adt7410_show_t_bound(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        u16 data;
        int ret;
 
@@ -508,7 +507,7 @@ static inline ssize_t adt7410_set_t_bound(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        long tmp1, tmp2;
        u16 data;
        char *pos;
@@ -628,7 +627,7 @@ static ssize_t adt7410_show_t_hyst(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        int ret;
        u8 t_hyst;
 
@@ -645,7 +644,7 @@ static inline ssize_t adt7410_set_t_hyst(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt7410_chip_info *chip = dev_info->dev_data;
+       struct adt7410_chip_info *chip = iio_priv(dev_info);
        int ret;
        unsigned long data;
        u8 t_hyst;
@@ -728,31 +727,27 @@ static int __devinit adt7410_probe(struct i2c_client *client,
                const struct i2c_device_id *id)
 {
        struct adt7410_chip_info *chip;
+       struct iio_dev *indio_dev;
        int ret = 0;
        unsigned long *adt7410_platform_data = client->dev.platform_data;
 
-       chip = kzalloc(sizeof(struct adt7410_chip_info), GFP_KERNEL);
-
-       if (chip == NULL)
-               return -ENOMEM;
-
+       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;
-       }
-       chip->indio_dev->name = id->name;
-       chip->indio_dev->dev.parent = &client->dev;
-       chip->indio_dev->info = &adt7410_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 = &adt7410_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;
 
@@ -763,7 +758,7 @@ static int __devinit adt7410_probe(struct i2c_client *client,
                                           &adt7410_event_handler,
                                           IRQF_TRIGGER_LOW,
                                           id->name,
-                                          chip->indio_dev);
+                                          indio_dev);
                if (ret)
                        goto error_unreg_dev;
        }
@@ -775,7 +770,7 @@ static int __devinit adt7410_probe(struct i2c_client *client,
                                           &adt7410_event_handler,
                                           adt7410_platform_data[1],
                                           id->name,
-                                          chip->indio_dev);
+                                          indio_dev);
                if (ret)
                        goto error_unreg_ct_irq;
        }
@@ -809,32 +804,27 @@ static int __devinit adt7410_probe(struct i2c_client *client,
        return 0;
 
 error_unreg_int_irq:
-       free_irq(adt7410_platform_data[0], chip->indio_dev);
+       free_irq(adt7410_platform_data[0], indio_dev);
 error_unreg_ct_irq:
-       free_irq(client->irq, chip->indio_dev);
+       free_irq(client->irq, indio_dev);
 error_unreg_dev:
-       iio_device_unregister(chip->indio_dev);
+       iio_device_unregister(indio_dev);
 error_free_dev:
-       iio_free_device(chip->indio_dev);
-error_free_chip:
-       kfree(chip);
-
+       iio_free_device(indio_dev);
+error_ret:
        return ret;
 }
 
 static int __devexit adt7410_remove(struct i2c_client *client)
 {
-       struct adt7410_chip_info *chip = i2c_get_clientdata(client);
-       struct iio_dev *indio_dev = chip->indio_dev;
+       struct iio_dev *indio_dev = i2c_get_clientdata(client);
        unsigned long *adt7410_platform_data = client->dev.platform_data;
 
        if (adt7410_platform_data[0])
-               free_irq(adt7410_platform_data[0], chip->indio_dev);
+               free_irq(adt7410_platform_data[0], indio_dev);
        if (client->irq)
-               free_irq(client->irq, chip->indio_dev);
+               free_irq(client->irq, indio_dev);
        iio_device_unregister(indio_dev);
-       iio_free_device(chip->indio_dev);
-       kfree(chip);
 
        return 0;
 }