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BQ76940: Question about BQ76940 "OR" supply on "REGSRC" pin

Part Number: BQ76940

An question about the power supply for BQ76940 on the PIN "REGSRC". I want to use two source as the supply on this PIN, one is using a FET referenced to the VC5X voltage as a source follower, and another is using a external regulator with 15V at the same. Using "diodes" for these two source as below picture. Please help check whether it is ok for this chip.