dapm_read
val = dapm_read(w->dapm, w->reg);
reg_val = dapm_read(dapm, reg);
reg_val = dapm_read(dapm, mc->rreg);
reg_val = dapm_read(dapm, e->reg);
unsigned int val = dapm_read(p->sink->dapm, reg);
val = dapm_read(p->sink->dapm, mc->rreg);
val = dapm_read(dapm, e->reg);
data->value = dapm_read(widget->dapm, e->reg) &