USB: usb_storage: add ums-realtek driver

ums_realtek is used to support the power-saving function
for Realtek RTS51xx USB card readers.

Signed-off-by: wwang <wei_wang@realsil.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/storage/Kconfig

@@ -31,6 +31,16 @@ config USB_STORAGE_DEBUG
 	  Say Y here in order to have the USB Mass Storage code generate
 	  verbose debugging messages.
 
+config USB_STORAGE_REALTEK
+	tristate "Realtek Card Reader support"
+	depends on USB_STORAGE
+	help
+	  Say Y here to include additional code to support the power-saving function
+	  for Realtek RTS51xx USB card readers.
+
+	  If this driver is compiled as a module, it will be named ums-realtek.
+
+
 config USB_STORAGE_DATAFAB
 	tristate "Datafab Compact Flash Reader support"
 	depends on USB_STORAGE

drivers/usb/storage/Makefile

@@ -30,6 +30,7 @@ obj-$(CONFIG_USB_STORAGE_ISD200)	+= ums-isd200.o
 obj-$(CONFIG_USB_STORAGE_JUMPSHOT)	+= ums-jumpshot.o
 obj-$(CONFIG_USB_STORAGE_KARMA)		+= ums-karma.o
 obj-$(CONFIG_USB_STORAGE_ONETOUCH)	+= ums-onetouch.o
+obj-$(CONFIG_USB_STORAGE_REALTEK)	+= ums-realtek.o
 obj-$(CONFIG_USB_STORAGE_SDDR09)	+= ums-sddr09.o
 obj-$(CONFIG_USB_STORAGE_SDDR55)	+= ums-sddr55.o
 obj-$(CONFIG_USB_STORAGE_USBAT)		+= ums-usbat.o
@@ -42,6 +43,7 @@ ums-isd200-y		:= isd200.o
 ums-jumpshot-y		:= jumpshot.o
 ums-karma-y		:= karma.o
 ums-onetouch-y		:= onetouch.o
+ums-realtek-y		:= realtek_cr.o
 ums-sddr09-y		:= sddr09.o
 ums-sddr55-y		:= sddr55.o
 ums-usbat-y		:= shuttle_usbat.o