CFG_OP_MODE
desc->cfg_start |= FIELD_PREP(CFG_OP_MODE, SPISG_OP_MODE_WRITE);
desc->cfg_start |= FIELD_PREP(CFG_OP_MODE, SPISG_OP_MODE_READ);
if (FIELD_GET(CFG_OP_MODE, desc->cfg_start) == SPISG_OP_MODE_READ_STS) {
desc->cfg_start |= FIELD_PREP(CFG_OP_MODE, SPISG_OP_MODE_WRITE) |