USB: Add MSM OTG Controller driver

This driver implements PHY initialization, clock management, ULPI IO ops
and simple OTG state machine to kick host/peripheral based on Id/VBUS
line status.  VBUS/Id lines are tied to a reference voltage on some boards.
Hence provide debugfs interface to select host/peripheral mode.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
index 5ce07528cd0c..915c729872f8 100644
--- a/drivers/usb/otg/Kconfig
+++ b/drivers/usb/otg/Kconfig
@@ -81,4 +81,14 @@ config USB_LANGWELL_OTG
           To compile this driver as a module, choose M here: the
           module will be called langwell_otg.
 
+config USB_MSM_OTG_72K
+        tristate "OTG support for Qualcomm on-chip USB controller"
+        depends on (USB || USB_GADGET) && ARCH_MSM
+        select USB_OTG_UTILS
+        help
+          Enable this to support the USB OTG transceiver on MSM chips. It
+          handles PHY initialization, clock management, and workarounds
+          required after resetting the hardware. This driver is required
+          even for peripheral only or host only mode configuration.
+
 endif # USB || OTG