usb: gadget: storage: make FSG_NUM_BUFFERS variable size

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / usb / gadget / Kconfig

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 5a084b9..a60b472 100644 (file)
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -96,6 +96,22 @@ config USB_GADGET_VBUS_DRAW
           This value will be used except for system-specific gadget
           drivers that have more specific information.
 
+config USB_GADGET_STORAGE_NUM_BUFFERS
+       int "Number of storage pipeline buffers"
+       range 2 4
+       default 2
+       help
+          Usually 2 buffers are enough to establish a good buffering
+          pipeline. The number may be increased in order to compensate
+          for a bursty VFS behaviour. For instance there may be CPU wake up
+          latencies that makes the VFS to appear bursty in a system with
+          an CPU on-demand governor. Especially if DMA is doing IO to
+          offload the CPU. In this case the CPU will go into power
+          save often and spin up occasionally to move data within VFS.
+          If selecting USB_GADGET_DEBUG_FILES this value may be set by
+          a module parameter as well.
+          If unsure, say 2.
+
 #
 # USB Peripheral Controller Support
 #
@@ -255,12 +271,11 @@ config USB_S3C_HSOTG
          integrated into the S3C64XX series SoC.
 
 config USB_IMX
-       tristate "Freescale IMX USB Peripheral Controller"
-       depends on ARCH_MX1
+       tristate "Freescale i.MX1 USB Peripheral Controller"
+       depends on ARCH_MXC
        help
-          Freescale's IMX series include an integrated full speed
-          USB 1.1 device controller.  The controller in the IMX series
-          is register-compatible.
+          Freescale's i.MX1 includes an integrated full speed
+          USB 1.1 device controller.
 
           It has Six fixed-function endpoints, as well as endpoint
           zero (for control transfers).
@@ -303,6 +318,18 @@ config USB_PXA_U2O
          PXA9xx Processor series include a high speed USB2.0 device
          controller, which support high speed and full speed USB peripheral.
 
+config USB_GADGET_DWC3
+       tristate "DesignWare USB3.0 (DRD) Controller"
+       depends on USB_DWC3
+       select USB_GADGET_DUALSPEED
+       select USB_GADGET_SUPERSPEED
+       help
+         DesignWare USB3.0 controller is a SuperSpeed USB3.0 Controller
+         which can be configured for peripheral-only, host-only, hub-only
+         and Dual-Role operation. This Controller was first integrated into
+         the OMAP5 series of processors. More information about the OMAP5
+         version of this controller, refer to http://www.ti.com/omap5.
+
 #
 # Controllers available in both integrated and discrete versions
 #