ADE9000_WF_SRC_MASK
wfb_cfg_val |= FIELD_PREP(ADE9000_WF_SRC_MASK, st->wf_src);
val = FIELD_GET(ADE9000_WF_SRC_MASK, val);
ADE9000_WF_SRC_MASK,
FIELD_PREP(ADE9000_WF_SRC_MASK, val));