diff options
| author | Peter Meerwald <pmeerw@pmeerw.net> | 2013-10-16 23:19:00 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-17 23:51:48 +0100 |
| commit | f3f755197b0436f212d11c5bb960e8ff3a784747 (patch) | |
| tree | 3b04676a50d6899f8026ab170ffe94ca06357a1a | |
| parent | ca4c6172cd0c924aebeb7545754af8107d2d27ae (diff) | |
staging:iio:hmc5843: Introduce _set_range_gain()
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | drivers/staging/iio/magnetometer/hmc5843.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c index a91d302facde..c819b8e34876 100644 --- a/drivers/staging/iio/magnetometer/hmc5843.c +++ b/drivers/staging/iio/magnetometer/hmc5843.c @@ -303,6 +303,20 @@ static int hmc5843_get_samp_freq_index(struct hmc5843_data *data, return -EINVAL; } +static int hmc5843_set_range_gain(struct hmc5843_data *data, u8 range) +{ + int ret; + + mutex_lock(&data->lock); + ret = i2c_smbus_write_byte_data(data->client, HMC5843_CONFIG_REG_B, + range << HMC5843_RANGE_GAIN_OFFSET); + if (ret >= 0) + data->range = range; + mutex_unlock(&data->lock); + + return ret; +} + static ssize_t hmc5843_show_scale_avail(struct device *dev, struct device_attribute *attr, char *buf) { @@ -364,7 +378,7 @@ static int hmc5843_write_raw(struct iio_dev *indio_dev, int val, int val2, long mask) { struct hmc5843_data *data = iio_priv(indio_dev); - int ret, rate, range; + int rate, range; switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: @@ -378,15 +392,7 @@ static int hmc5843_write_raw(struct iio_dev *indio_dev, if (range < 0) return -EINVAL; - range <<= HMC5843_RANGE_GAIN_OFFSET; - mutex_lock(&data->lock); - ret = i2c_smbus_write_byte_data(data->client, - HMC5843_CONFIG_REG_B, range); - if (ret >= 0) - data->range = range; - mutex_unlock(&data->lock); - - return ret; + return hmc5843_set_range_gain(data, range); default: return -EINVAL; } @@ -495,9 +501,8 @@ static void hmc5843_init(struct hmc5843_data *data) { hmc5843_set_meas_conf(data, HMC5843_MEAS_CONF_NORMAL); hmc5843_set_samp_freq(data, HMC5843_RATE_DEFAULT); + hmc5843_set_range_gain(data, HMC5843_RANGE_GAIN_DEFAULT); hmc5843_set_mode(data, HMC5843_MODE_CONVERSION_CONTINUOUS); - i2c_smbus_write_byte_data(data->client, HMC5843_CONFIG_REG_B, - HMC5843_RANGE_GAIN_DEFAULT); } static const struct iio_info hmc5843_info = { |