AD5755_NUM_CHANNELS
unsigned int ctrl[AD5755_NUM_CHANNELS];
struct iio_chan_spec channels[AD5755_NUM_CHANNELS];
for (i = 0; i < AD5755_NUM_CHANNELS; ++i) {
if (devnr >= AD5755_NUM_CHANNELS) {
indio_dev->num_channels = AD5755_NUM_CHANNELS;