From TWL4030__TPS65950 OMAP™ Power Management and System Companion Device ES 1.0 TRM (Rev. D)__swcu050d (TI publically available docs):

(page 869)
**Table 15-40. OTG_CTRL**
Address Offset 0x0A
Description Controls UTMI+ OTG functions of the PHY
Type RW

Bit: 5
Field Name: DRVVBUS
Description:
. Signals the internal charge pump to drive 5 V on VBUS
. 0b: Do not drive VBUS.
. 1b: Drive 5 V on VBUS.
Type: RW
Reset 0