VDD
show(VDD, in_input0, voltage_in[0]);
show(VDD, in_min0, voltage_min[0]);
show(VDD, in_max0, voltage_max[0]);
set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
[LPADC_VDD] = LP8788_CHAN(VDD, IIO_VOLTAGE),
priv->vregs[VDD].supply = "vdd";
static IIO_DEVICE_ATTR(VDD, 0444, adt7316_show_VDD, NULL, 0);