[Galaxy Ace S5830 General] mdfzhi:
we already got those same usbotg driver as zte blade in the kernel source, and its also built by default, even on stock kernel.

the makefile

#
# USB OTG infrastructure may be needed for peripheral-only, host-only,
# or OTG-capable configurations when OTG transceivers or controllers
# are used.
#

comment "OTG and related infrastructure"

config USB_OTG_UTILS
bool
help
Select this to make sure the build includes objects from
the OTG infrastructure directory.

if USB || USB_GADGET

#
# USB Transceiver Drivers
#
config USB_GPIO_VBUS
tristate "GPIO based peripheral-only VBUS sensing 'transceiver'"
depends on GENERIC_GPIO
select USB_OTG_UTILS
help
Provides simple GPIO VBUS sensing for controllers with an
internal transceiver via the otg_transceiver interface, and
optionally control of a D+ pullup GPIO as well as a VBUS
current limit regulator.

config ISP1301_OMAP
tristate "Philips ISP1301 with OMAP OTG"
depends on I2C && ARCH_OMAP_OTG
select USB_OTG_UTILS
help
If you say yes here you get support for the Philips ISP1301
USB-On-The-Go transceiver working with the OMAP OTG controller.
The ISP1301 is a full speed USB transceiver which is used in
products including H2, H3, and H4 development boards for Texas
Instruments OMAP processors.

This driver can also be built as a module. If so, the module
will be called isp1301_omap.

config USB_ULPI
bool "Generic ULPI Transceiver Driver"
depends on ARM
select USB_OTG_UTILS
help
Enable this to support ULPI connected USB OTG transceivers which
are likely found on embedded boards.

The only chip currently supported is NXP's ISP1504

config TWL4030_USB
tristate "TWL4030 USB Transceiver Driver"
depends on TWL4030_CORE && REGULATOR_TWL4030
select USB_OTG_UTILS
help
Enable this to support the USB OTG transceiver on TWL4030
family chips (including the TWL5030 and TPS659x0 devices).
This transceiver supports high and full speed devices plus,
in host mode, low speed.

config USB_MSM_OTG_72K
bool "OTG support for Qualcomm on-chip USB controller"
depends on ARCH_MSM
select USB_OTG_UTILS
default USB_MSM_72K
help
Enable this to support the USB OTG transceiver on MSM chips. It
handles PHY initialization, clock management, low power mode and
workarounds required after resetting the hardware. This driver is
required for even peripheral only or host only mode configuration.
Supports SRP and HNP when both gadget and Host are selected.

config MSM_OTG_ENABLE_A_WAIT_BCON_TIMEOUT
bool "Enable A-device timeout for B-device connection"
depends on USB_MSM_OTG_72K
default n
help
OTG specification allows A-device to turn off VBUS if B-device
fails to signal connect event before TA_WAIT_BCON (1.1 - 30 sec).
SRP detection is enabled and hardware is put into low power mode
upon this timeout.

If you say yes, VBUS will be turned off if B-device does not signal
connect in 30 sec. Otherwise VBUS is not turned off when Micro-A
cable is connected. But hardware is put into LPM. Say no if leakage
currents in your system are minimum.

config USB_MSM_ACA
bool "Support for Accessory Charger Adapter (ACA)"
depends on USB_MSM_OTG_72K
default n
help
Accesory Charger Adapter is a charger specified in USB Battery
Charging Specification(1.1). It enables OTG devices to charge
while operating as a host or peripheral at the same time.

config NOP_USB_XCEIV
tristate "NOP USB Transceiver Driver"
select USB_OTG_UTILS
help
this driver is to be used by all the usb transceiver which are either
built-in with usb ip or which are autonomous and doesn't require any
phy programming such as ISP1x04 etc.

endif # USB || OTG

in kernel defconfig

#
# OTG and related infrastructure
#
CONFIG_USB_OTG_UTILS=y
# CONFIG_USB_GPIO_VBUS is not set
# CONFIG_USB_ULPI is not set
CONFIG_USB_MSM_OTG_72K=y
# CONFIG_MSM_OTG_ENABLE_A_WAIT_BCON_TIMEOUT is not set
# CONFIG_USB_MSM_ACA is not set
# CONFIG_NOP_USB_XCEIV is not set
CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
CONFIG_MMC_PERF_PROFILING=y
CONFIG_MMC_UNSAFE_RESUME=y
# CONFIG_MMC_EMBEDDED_SDIO is not set
# CONFIG_MMC_PARANOID_SD_INIT is not set