Looking the schematics of the SABRE SDB we have few doubts about the posibility of making few modifications of the PMIC configuration (sheet 19) for a custom design.
1. Can we remove the SWBST input switching circuit (Q510+Q511)?. We can't find any reference to "SWBST_PWR_EN" on the rest of the schematics so we assume that SWBST is always ON due the pull-up (R592).
2. Can we left unconnected LICELL pin if we don't plan to use the RTC when the iMX6 is off?.
3. We want to use the "F0" pre-programmed configuration (which seems to be the same used in SABRE SDB although the PMIC is a "NP" part). Is safe to remove all shorts/jumpers? Since the design is already tested....
4. What purpose is "PWR_BTN_SNS"? Can we remove this connection and D4 if "AUTO ON" is used?.