[PATCH 7/7] usbhid: add Kconfig option USBHID_PROC_FS

[Paul Walmsley <paul@booyaka.com>]

From: Paul Walmsley <paul@booyaka.com>

Add a Kconfig option USBHID_PROC_FS that controls the appearance of 
/proc/usbhid/device_quirks.


Signed-off-by: Paul Walmsley <paul@booyaka.com>

---
  dev/drivers/usb/input/Kconfig |   26 ++++++++++++++++++++++++++
  1 file changed, 26 insertions(+)

Index: linux/dev/drivers/usb/input/Kconfig
===================================================================
--- linux.orig/dev/drivers/usb/input/Kconfig
+++ linux/dev/drivers/usb/input/Kconfig
@@ -27,6 +27,32 @@ config USB_HID
  comment "Input core support is needed for USB HID input layer or HIDBP support"
  	depends on USB_HID && INPUT=n

+config USBHID_PROC_FS
+	bool "Enable USBHID procfs support"
+	default y
+	depends on USB_HID && PROC_FS
+	help
+	  Say Y here if you want to be able to query and change the
+	  HID "blacklist" at runtime.  This enables the
+	  /proc/usbhid/device_quirks file, which contains a list of all
+	  active USB HID quirks.
+
+	  The list consists of four entries per quirk: a 16-bit USB vendor
+	  ID, a 16-bit USB product ID, a 16-bit product ID mask, and a 32-bit
+	  quirks field.  To update the quirks list, write a string to the
+	  file, e.g.:
+
+	  echo '0xcd4:0x1:0xffff:0x4' > /proc/usbhid/device_quirks
+
+	  If a quirk exists for this (vendor ID, product ID, product mask)
+	  combination, its quirk value will be replaced with 0x4; otherwise,
+ 	  a new quirk will be added.  Quirks may be removed from the list
+	  by using 0x0 for the quirks value.  Quirks values are defined in
+	  include/linux/hid.h.  Multiple product IDs can be covered by
+	  using other values for the product mask.
+
+	  If unsure, say Y.
+
  config USB_HIDINPUT_POWERBOOK
  	bool "Enable support for iBook/PowerBook special keys"
  	default n