WSMEX_M_PMON_ZDP_CTL_FVC_MASK
mask = WSMEX_M_PMON_ZDP_CTL_FVC_MASK;
mask = WSMEX_M_PMON_ZDP_CTL_FVC_MASK |
config |= WSMEX_M_PMON_ZDP_CTL_FVC_MASK & reg1->config;