staging:iio:hmc5843: Remove ability to change operating mode

only continuous mode is supported for now; the driver could/should
be switched to single conversion mode

operating mode should be determined by the way IIO accesses the device
and not exposed explicitly

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c
index aeaea0984c3132f5ac804a109415ff3add285054..5204b9abb0bdea1338ff8950e84ffe60d8db5bc8 100644 (file)
--- a/drivers/staging/iio/magnetometer/hmc5843.c
+++ b/drivers/staging/iio/magnetometer/hmc5843.c
@@ -185,73 +185,6 @@ static int hmc5843_read_measurement(struct hmc5843_data *data,
        return IIO_VAL_INT;
 }
 
-/*
- * From the datasheet:
- * 0 - Continuous-Conversion Mode: In continuous-conversion mode, the
- *     device continuously performs conversions and places the result in
- *     the data register.
- *
- * 1 - Single-Conversion Mode : Device performs a single measurement,
- *     sets RDY high and returns to sleep mode.
- *
- * 2 - Idle Mode : Device is placed in idle mode.
- *
- * 3 - Sleep Mode : Device is placed in sleep mode.
- *
- */
-static ssize_t hmc5843_show_operating_mode(struct device *dev,
-                                       struct device_attribute *attr,
-                                       char *buf)
-{
-       struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-       struct hmc5843_data *data = iio_priv(indio_dev);
-       return sprintf(buf, "%d\n", data->operating_mode);
-}
-
-static ssize_t hmc5843_set_operating_mode(struct device *dev,
-                               struct device_attribute *attr,
-                               const char *buf,
-                               size_t count)
-{
-       struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-       struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
-       struct hmc5843_data *data = iio_priv(indio_dev);
-       struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-       unsigned long operating_mode = 0;
-       s32 status;
-       int error;
-
-       mutex_lock(&data->lock);
-       error = kstrtoul(buf, 10, &operating_mode);
-       if (error) {
-               count = error;
-               goto exit;
-       }
-       dev_dbg(dev, "set conversion mode to %lu\n", operating_mode);
-       if (operating_mode > HMC5843_MODE_SLEEP) {
-               count = -EINVAL;
-               goto exit;
-       }
-
-       status = i2c_smbus_write_byte_data(client, this_attr->address,
-                                       operating_mode);
-       if (status) {
-               count = -EINVAL;
-               goto exit;
-       }
-       data->operating_mode = operating_mode;
-
-exit:
-       mutex_unlock(&data->lock);
-       return count;
-}
-
-static IIO_DEVICE_ATTR(operating_mode,
-                       S_IWUSR | S_IRUGO,
-                       hmc5843_show_operating_mode,
-                       hmc5843_set_operating_mode,
-                       HMC5843_MODE_REG);
-
 /*
  * API for setting the measurement configuration to
  * Normal, Positive bias and Negative bias
@@ -531,7 +464,6 @@ static const struct iio_chan_spec hmc5883_channels[] = {
 
 static struct attribute *hmc5843_attributes[] = {
        &iio_dev_attr_meas_conf.dev_attr.attr,
-       &iio_dev_attr_operating_mode.dev_attr.attr,
        &iio_dev_attr_scale_available.dev_attr.attr,
        &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
        NULL