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Commit f0ae849d authored by Hao Wu's avatar Hao Wu Committed by Greg Kroah-Hartman
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usb: Add Intel Langwell USB OTG Transceiver Driver 



This adds support for the USB transceiver driver in the Langwell chipset used
on the Intel MID platforms. It folds up the original patch set which includes
basic support for the device, PHY low power mode (Please notice that there is
a limitation, after we drive VBus down, 2ms delay is required from SCU FW to
sync up OTGSC register with USBCFG register), software timers (the hardware
timers do not work in low power mode), HNP, SRP.


Signed-off-by: default avatarHao Wu <hao.wu@intel.com>
Signed-off-by: default avatarAlek Du <alek.du@intel.com>
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent f6f94e2a

drivers/usb/otg/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -67,4 +67,18 @@ config NOP_USB_XCEIV 
	 built-in with usb ip or which are autonomous and doesn't require any

	 phy programming such as ISP1x04 etc.



config USB_LANGWELL_OTG

	tristate "Intel Langwell USB OTG dual-role support"

	depends on USB && X86_MRST

	select USB_OTG

	select USB_OTG_UTILS

	help

	  Say Y here if you want to build Intel Langwell USB OTG

	  transciever driver in kernel. This driver implements role

	  switch between EHCI host driver and Langwell USB OTG

	  client driver.



	  To compile this driver as a module, choose M here: the

	  module will be called langwell_otg.



endif # USB || OTG

drivers/usb/otg/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ obj-$(CONFIG_USB_OTG_UTILS) += otg.o 
obj-$(CONFIG_USB_GPIO_VBUS)	+= gpio_vbus.o

obj-$(CONFIG_ISP1301_OMAP)	+= isp1301_omap.o

obj-$(CONFIG_TWL4030_USB)	+= twl4030-usb.o

obj-$(CONFIG_USB_LANGWELL_OTG)	+= langwell_otg.o

obj-$(CONFIG_NOP_USB_XCEIV)	+= nop-usb-xceiv.o

obj-$(CONFIG_USB_ULPI)		+= ulpi.o