[PATCH] USB: isp1301_omap driver (OTG core)

This adds the isp1301_omap driver, supporting USB OTG on OMAP systems.
The driver tightly couples two different chunks of hardware, which are
used to implement the OTG protocols:

 - The Philips ISP1301 OTG transceiver (an I2C device) senses voltage
   levels and sources VBUS current in the A-Device roles.

 - OMAP's OTG controller handles lots of OTG transitions, and
   tells the transceiver what to do.

The driver implements the abstract "otg_transceiver" API, since it's got to
talk to both the host controller (OHCI on current OMAPs) and the peripheral
controller (omap_udc) while hiding a variety of implementation details.  It
should be easy to tweak to work on other OMAP boards using the isp1301 chip;
OMAP boards with other transceivers, or non-OMAP boards using isp1301, will
probably find things to learn from.

Note that this also supports two non-OTG modes, with the OTG controller
disabled; very handy for debugging just the host side USB stack, or just the
peripheral side USB stack.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/i2c/chips/Kconfig

@@ -299,4 +299,16 @@ config SENSORS_RTC8564
 	  This driver can also be built as a module.  If so, the module
 	  will be called i2c-rtc8564.
 
+config ISP1301_OMAP
+	tristate "Philips ISP1301 with OMAP OTG"
+	depends on I2C && ARCH_OMAP_OTG
+	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 used in products including H2 and H3 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.
+
 endmenu

drivers/i2c/chips/Makefile

@@ -29,7 +29,9 @@ obj-$(CONFIG_SENSORS_RTC8564)	+= rtc8564.o
 obj-$(CONFIG_SENSORS_SMSC47M1)	+= smsc47m1.o
 obj-$(CONFIG_SENSORS_VIA686A)	+= via686a.o
 obj-$(CONFIG_SENSORS_W83L785TS)	+= w83l785ts.o
+obj-$(CONFIG_ISP1301_OMAP)	+= isp1301_omap.o
 
 ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
 EXTRA_CFLAGS += -DDEBUG
 endif
+