staging:iio:adc:ad7150: remove conversion mode handling.

The AD7150 family of devices power up in continues conversion mode.
We can stay in this mode, unless power consumption becomes a real issue.
Actually the event generation as well as the running average
relies on continues conversion mode, so we better stay there.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/adc/ad7150.c b/drivers/staging/iio/adc/ad7150.c
index 0685b8a..c561044 100644 (file)
--- a/drivers/staging/iio/adc/ad7150.c
+++ b/drivers/staging/iio/adc/ad7150.c
@@ -89,93 +89,10 @@ struct ad7150_chip_info {
        struct mutex state_lock;
 };
 
-struct ad7150_conversion_mode {
-       char *name;
-       u8 reg_cfg;
-};
-
-static struct ad7150_conversion_mode
-ad7150_conv_mode_table[AD7150_MAX_CONV_MODE] = {
-       { "idle", 0 },
-       { "continuous-conversion", 1 },
-       { "single-conversion", 2 },
-       { "power-down", 3 },
-};
-
 /*
  * sysfs nodes
  */
 
-#define IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(_show)                     \
-       IIO_DEVICE_ATTR(available_conversion_modes, S_IRUGO, _show, NULL, 0)
-#define IIO_DEV_ATTR_CONVERSION_MODE(_mode, _show, _store)              \
-       IIO_DEVICE_ATTR(conversion_mode, _mode, _show, _store, 0)
-
-static ssize_t ad7150_show_conversion_modes(struct device *dev,
-               struct device_attribute *attr,
-               char *buf)
-{
-       int i;
-       int len = 0;
-
-       for (i = 0; i < AD7150_MAX_CONV_MODE; i++)
-               len += sprintf(buf + len, "%s\n",
-                              ad7150_conv_mode_table[i].name);
-
-       return len;
-}
-
-static IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(ad7150_show_conversion_modes);
-
-static ssize_t ad7150_show_conversion_mode(struct device *dev,
-               struct device_attribute *attr,
-               char *buf)
-{
-       struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct ad7150_chip_info *chip = iio_priv(dev_info);
-
-       return sprintf(buf, "%s\n", chip->conversion_mode);
-}
-
-static ssize_t ad7150_store_conversion_mode(struct device *dev,
-               struct device_attribute *attr,
-               const char *buf,
-               size_t len)
-{
-       struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct ad7150_chip_info *chip = iio_priv(dev_info);
-       u8 cfg;
-       int i, ret;
-
-       ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG);
-       if (ret < 0)
-               return ret;
-       cfg = ret;
-
-       for (i = 0; i < AD7150_MAX_CONV_MODE; i++) {
-               if (strncmp(buf, ad7150_conv_mode_table[i].name,
-                               strlen(ad7150_conv_mode_table[i].name) - 1) ==
-                   0) {
-                       chip->conversion_mode = ad7150_conv_mode_table[i].name;
-                       cfg |= 0x18 | ad7150_conv_mode_table[i].reg_cfg;
-                       ret = i2c_smbus_write_byte_data(chip->client,
-                                                       AD7150_CFG,
-                                                       cfg);
-                       if (ret < 0)
-                               return ret;
-                       return len;
-               }
-       }
-
-       dev_err(dev, "not supported conversion mode\n");
-
-       return -EINVAL;
-}
-
-static IIO_DEV_ATTR_CONVERSION_MODE(S_IRUGO | S_IWUSR,
-               ad7150_show_conversion_mode,
-               ad7150_store_conversion_mode);
-
 static const u8 ad7150_addresses[][6] = {
        { AD7150_CH1_DATA_HIGH, AD7150_CH1_AVG_HIGH,
          AD7150_CH1_SETUP, AD7150_CH1_THR_HOLD_H,
@@ -543,16 +460,6 @@ static const struct iio_chan_spec ad7150_channels[] = {
        },
 };
 
-static struct attribute *ad7150_attributes[] = {
-       &iio_dev_attr_available_conversion_modes.dev_attr.attr,
-       &iio_dev_attr_conversion_mode.dev_attr.attr,
-       NULL,
-};
-
-static const struct attribute_group ad7150_attribute_group = {
-       .attrs = ad7150_attributes,
-};
-
 /*
  * threshold events
  */
@@ -637,7 +544,6 @@ static struct attribute_group ad7150_event_attribute_group = {
 };
 
 static const struct iio_info ad7150_info = {
-       .attrs = &ad7150_attribute_group,
        .event_attrs = &ad7150_event_attribute_group,
        .driver_module = THIS_MODULE,
        .read_raw = &ad7150_read_raw,