staging:iio:adc:adt75: allocate chip state with iio_dev and cleanup some function...

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/adt75.c b/drivers/staging/iio/adc/adt75.c
index 1171fb9c178f265fb135e5dbb377b79410261423..38f141de6a4be018054dfa424126df05c4232761 100644 (file)
--- a/drivers/staging/iio/adc/adt75.c
+++ b/drivers/staging/iio/adc/adt75.c
@@ -51,7 +51,6 @@
 
 struct adt75_chip_info {
        struct i2c_client *client;
-       struct iio_dev *indio_dev;
        u8  config;
 };
 
@@ -59,8 +58,9 @@ struct adt75_chip_info {
  * adt75 register access by I2C
  */
 
-static int adt75_i2c_read(struct adt75_chip_info *chip, u8 reg, u8 *data)
+static int adt75_i2c_read(struct iio_dev *dev_info, u8 reg, u8 *data)
 {
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        struct i2c_client *client = chip->client;
        int ret = 0, len;
 
@@ -84,8 +84,9 @@ static int adt75_i2c_read(struct adt75_chip_info *chip, u8 reg, u8 *data)
        return ret;
 }
 
-static int adt75_i2c_write(struct adt75_chip_info *chip, u8 reg, u8 data)
+static int adt75_i2c_write(struct iio_dev *dev_info, u8 reg, u8 data)
 {
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        struct i2c_client *client = chip->client;
        int ret = 0;
 
@@ -104,8 +105,7 @@ static ssize_t adt75_show_mode(struct device *dev,
                struct device_attribute *attr,
                char *buf)
 {
-       struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_get_drvdata(dev));
 
        if (chip->config & ADT75_PD)
                return sprintf(buf, "power-save\n");
@@ -119,11 +119,11 @@ static ssize_t adt75_store_mode(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        int ret;
        u8 config;
 
-       ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+       ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
        if (ret)
                return -EIO;
 
@@ -131,7 +131,7 @@ static ssize_t adt75_store_mode(struct device *dev,
        if (!strcmp(buf, "full"))
                config |= ADT75_PD;
 
-       ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+       ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
        if (ret)
                return -EIO;
 
@@ -158,8 +158,7 @@ static ssize_t adt75_show_oneshot(struct device *dev,
                struct device_attribute *attr,
                char *buf)
 {
-       struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_get_drvdata(dev));
 
        return sprintf(buf, "%d\n", !!(chip->config & ADT75_ONESHOT));
 }
@@ -170,7 +169,7 @@ static ssize_t adt75_store_oneshot(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        unsigned long data = 0;
        int ret;
        u8 config;
@@ -180,7 +179,7 @@ static ssize_t adt75_store_oneshot(struct device *dev,
                return -EINVAL;
 
 
-       ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+       ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
        if (ret)
                return -EIO;
 
@@ -188,7 +187,7 @@ static ssize_t adt75_store_oneshot(struct device *dev,
        if (data)
                config |= ADT75_ONESHOT;
 
-       ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+       ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
        if (ret)
                return -EIO;
 
@@ -207,7 +206,7 @@ static ssize_t adt75_show_value(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        u16 data;
        char sign = ' ';
        int ret;
@@ -224,7 +223,7 @@ static ssize_t adt75_show_value(struct device *dev,
                        return -EIO;
        }
 
-       ret = adt75_i2c_read(chip, ADT75_TEMPERATURE, (u8 *)&data);
+       ret = adt75_i2c_read(dev_info, ADT75_TEMPERATURE, (u8 *)&data);
        if (ret)
                return -EIO;
 
@@ -277,11 +276,11 @@ static ssize_t adt75_show_oti_mode(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        int ret;
 
        /* retrive ALART status */
-       ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+       ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
        if (ret)
                return -EIO;
 
@@ -297,12 +296,12 @@ static ssize_t adt75_set_oti_mode(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        int ret;
        u8 config;
 
        /* retrive ALART status */
-       ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+       ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
        if (ret)
                return -EIO;
 
@@ -310,7 +309,7 @@ static ssize_t adt75_set_oti_mode(struct device *dev,
        if (strcmp(buf, "comparator") != 0)
                config |= ADT75_OS_INT;
 
-       ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+       ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
        if (ret)
                return -EIO;
 
@@ -331,11 +330,11 @@ static ssize_t adt75_show_smbus_alart(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        int ret;
 
        /* retrive ALART status */
-       ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+       ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
        if (ret)
                return -EIO;
 
@@ -348,7 +347,7 @@ static ssize_t adt75_set_smbus_alart(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        unsigned long data = 0;
        int ret;
        u8 config;
@@ -358,7 +357,7 @@ static ssize_t adt75_set_smbus_alart(struct device *dev,
                return -EINVAL;
 
        /* retrive ALART status */
-       ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+       ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
        if (ret)
                return -EIO;
 
@@ -366,7 +365,7 @@ static ssize_t adt75_set_smbus_alart(struct device *dev,
        if (data)
                config |= ADT75_SMBUS_ALART;
 
-       ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+       ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
        if (ret)
                return -EIO;
 
@@ -380,11 +379,11 @@ static ssize_t adt75_show_fault_queue(struct device *dev,
                char *buf)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        int ret;
 
        /* retrive ALART status */
-       ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+       ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
        if (ret)
                return -EIO;
 
@@ -398,7 +397,7 @@ static ssize_t adt75_set_fault_queue(struct device *dev,
                size_t len)
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
+       struct adt75_chip_info *chip = iio_priv(dev_info);
        unsigned long data;
        int ret;
        u8 config;
@@ -408,13 +407,13 @@ static ssize_t adt75_set_fault_queue(struct device *dev,
                return -EINVAL;
 
        /* retrive ALART status */
-       ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+       ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
        if (ret)
                return -EIO;
 
        config = chip->config & ~ADT75_FAULT_QUEUE_MASK;
        config |= (data << ADT75_FAULT_QUEUE_OFFSET);
-       ret = adt75_i2c_write(chip, ADT75_CONFIG, config);
+       ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
        if (ret)
                return -EIO;
 
@@ -428,12 +427,11 @@ static inline ssize_t adt75_show_t_bound(struct device *dev,
 {
        struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
        u16 data;
        char sign = ' ';
        int ret;
 
-       ret = adt75_i2c_read(chip, this_attr->address, (u8 *)&data);
+       ret = adt75_i2c_read(dev_info, this_attr->address, (u8 *)&data);
        if (ret)
                return -EIO;
 
@@ -456,7 +454,6 @@ static inline ssize_t adt75_set_t_bound(struct device *dev,
 {
        struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
        struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct adt75_chip_info *chip = dev_info->dev_data;
        long tmp1, tmp2;
        u16 data;
        char *pos;
@@ -491,7 +488,7 @@ static inline ssize_t adt75_set_t_bound(struct device *dev,
        data <<= ADT75_VALUE_OFFSET;
        data = swab16(data);
 
-       ret = adt75_i2c_write(chip, this_attr->address, (u8)data);
+       ret = adt75_i2c_write(dev_info, this_attr->address, (u8)data);
        if (ret)
                return -EIO;
 
@@ -549,31 +546,27 @@ static int __devinit adt75_probe(struct i2c_client *client,
                const struct i2c_device_id *id)
 {
        struct adt75_chip_info *chip;
+       struct iio_dev *indio_dev;
        int ret = 0;
 
-       chip = kzalloc(sizeof(struct adt75_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 = &adt75_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 = &adt75_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;
 
@@ -582,12 +575,12 @@ static int __devinit adt75_probe(struct i2c_client *client,
                                           NULL,
                                           &adt75_event_handler,
                                           IRQF_TRIGGER_LOW,
-                                          chip->indio_dev->name,
-                                          chip->indio_dev);
+                                          indio_dev->name,
+                                          indio_dev);
                if (ret)
                        goto error_unreg_dev;
 
-               ret = adt75_i2c_read(chip, ADT75_CONFIG, &chip->config);
+               ret = adt75_i2c_read(indio_dev, ADT75_CONFIG, &chip->config);
                if (ret) {
                        ret = -EIO;
                        goto error_unreg_irq;
@@ -596,7 +589,7 @@ static int __devinit adt75_probe(struct i2c_client *client,
                /* set irq polarity low level */
                chip->config &= ~ADT75_OS_POLARITY;
 
-               ret = adt75_i2c_write(chip, ADT75_CONFIG, chip->config);
+               ret = adt75_i2c_write(indio_dev, ADT75_CONFIG, chip->config);
                if (ret) {
                        ret = -EIO;
                        goto error_unreg_irq;
@@ -604,31 +597,27 @@ static int __devinit adt75_probe(struct i2c_client *client,
        }
 
        dev_info(&client->dev, "%s temperature sensor registered.\n",
-                        chip->indio_dev->name);
+                        indio_dev->name);
 
        return 0;
 error_unreg_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 adt75_remove(struct i2c_client *client)
 {
-       struct adt75_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, chip->indio_dev);
+               free_irq(client->irq, indio_dev);
        iio_device_unregister(indio_dev);
-       iio_free_device(chip->indio_dev);
-       kfree(chip);
+       iio_free_device(indio_dev);
 
        return 0;
 }