linux-kernel - [PATCH] : Allow embedded developers USB options normally reserved for OTG

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Date:	Wed, 2 Jan 2008 09:48:51 -0500
From:	Robin Getz <rgetz@...ckfin.uclinux.org>
To:	gregkh@...e.de
Cc:	linux-kernel@...r.kernel.org, linux-usb-devel@...ts.sourceforge.net
Subject: [PATCH] : Allow embedded developers USB options normally reserved for OTG

From: Robin Getz <rgetz@...ckfin.uclinux.org>

Allow embedded developers to turn support for USB Hubs off even if they have a 
full root hub. This saves the overhead (RAM and Flash size).

Allow embedded developers the capabilities of the "otg_whitelist.h" - a 
product whitelist, so USB peripherals not listed there will be rejected 
during enumeration. This is the desired operation for many embedded products.

Signed-off-by: Robin Getz <rgetz@...ckfin.uclinux.org>

---

 drivers/usb/core/Kconfig |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)


Index: linux-2.6.x/drivers/usb/core/Kconfig
===================================================================
--- linux-2.6.x/drivers/usb/core/Kconfig	(revision 4074)
+++ linux-2.6.x/drivers/usb/core/Kconfig	(working copy)
@@ -95,8 +95,9 @@
 
 config USB_OTG_WHITELIST
 	bool "Rely on OTG Targeted Peripherals List"
-	depends on USB_OTG
-	default y
+	depends on USB_OTG || EMBEDDED
+	default y if USB_OTG
+	default n if EMBEDDED
 	help
 	  If you say Y here, the "otg_whitelist.h" file will be used as a
 	  product whitelist, so USB peripherals not listed there will be
@@ -111,7 +112,7 @@
 
 config USB_OTG_BLACKLIST_HUB
 	bool "Disable external hubs"
-	depends on USB_OTG
+	depends on USB_OTG || EMBEDDED
 	help
 	  If you say Y here, then Linux will refuse to enumerate
 	  external hubs.  OTG hosts are allowed to reduce hardware
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