linux-kernel - RE: [PATCH 6/8] ARM: tegra: USB

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Date:	Thu, 1 Mar 2012 12:05:34 -0800
From:	Stephen Warren <swarren@...dia.com>
To:	Alan Ott <alan@...nal11.us>, Russell King <linux@....linux.org.uk>,
	Colin Cross <ccross@...roid.com>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Lucas De Marchi <lucas.demarchi@...fusion.mobi>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
CC:	Arnd Bergmann <arnd@...db.de>
Subject: RE: [PATCH 6/8] ARM: tegra: USB_ULPI needs USB

Alan Ott wrote at Thursday, March 01, 2012 12:27 PM:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The USB_ULPI driver is selected by tegra, but can only be
> built if at least one of USB or USB_GADGET is enabled.
> The kernel fails to link if both are off.

> diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
...
> @@ -10,6 +10,7 @@ config ARCH_TEGRA_2x_SOC
...
> +	select USB_GADGET if USB_SUPPORT && !USB

I don't believe the Tegra USB driver supports gadget mode at present.
Would the above be better written as:

    select USB if USB_SUPPORT

And I wonder if the Tegra EHCI driver shouldn't be doing some of these
selects, not the ARCH_TEGRA_* option.

And this is probably required for Tegra30 too not just Tegra20.

-- 
nvpublic

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