rv3028_update_cfg
return rv3028_update_cfg(rv3028, RV3028_BACKUP, RV3028_BACKUP_BSM,
return rv3028_update_cfg(rv3028, RV3028_CLKOUT, 0xff,
ret = rv3028_update_cfg(rv3028, RV3028_BACKUP, RV3028_BACKUP_TCE |