usb: add bus type for USB ULPI

[cascardo/linux.git] / drivers / usb / core / Kconfig

diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index cc0ced0..a99c89e 100644 (file)
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -84,3 +84,23 @@ config USB_OTG_FSM
          Implements OTG Finite State Machine as specified in On-The-Go
          and Embedded Host Supplement to the USB Revision 2.0 Specification.
 
+config USB_ULPI_BUS
+       tristate "USB ULPI PHY interface support"
+       depends on USB_SUPPORT
+       help
+         UTMI+ Low Pin Interface (ULPI) is specification for a commonly used
+         USB 2.0 PHY interface. The ULPI specification defines a standard set
+         of registers that can be used to detect the vendor and product which
+         allows ULPI to be handled as a bus. This module is the driver for that
+         bus.
+
+         The ULPI interfaces (the buses) are registered by the drivers for USB
+         controllers which support ULPI register access and have ULPI PHY
+         attached to them. The ULPI PHY drivers themselves are normal PHY
+         drivers.
+
+         ULPI PHYs provide often functions such as ADP sensing/probing (OTG
+         protocol) and USB charger detection.
+
+         To compile this driver as a module, choose M here: the module will
+         be called ulpi.