linux-kernel - Re: [PATCH v4 2/2] usb: gadget: Add xilinx usb2 device support

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Date:	Thu, 21 Aug 2014 09:00:40 -0500
From:	Felipe Balbi <balbi@...com>
To:	sundeep subbaraya <sundeep.lkml@...il.com>
CC:	Daniel Mack <daniel@...que.org>,
	Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>,
	"balbi@...com" <balbi@...com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Michal Simek <michals@...inx.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	<svemula@...inx.com>, <anirudh@...inx.com>,
	Subbaraya Sundeep Bhatta <sbhatta@...inx.com>
Subject: Re: [PATCH v4 2/2] usb: gadget: Add xilinx usb2 device support

On Thu, Aug 21, 2014 at 12:19:03PM +0530, sundeep subbaraya wrote:
> Hi Daniel,
> 
> On Tue, Aug 19, 2014 at 3:26 PM, Daniel Mack <daniel@...que.org> wrote:
> > Hi,
> >
> > On 07/22/2014 11:08 AM, Subbaraya Sundeep Bhatta wrote:
> >> This patch adds xilinx usb2 device driver support
> >
> > Add some more information here, please. Copying the text from the
> > Kconfig option is already a good start.
> >
> >>  drivers/usb/gadget/Kconfig      |   14 +
> >>  drivers/usb/gadget/Makefile     |    1 +
> >>  drivers/usb/gadget/udc-xilinx.c | 2261 +++++++++++++++++++++++++++++++++++++++
> >>  3 files changed, 2276 insertions(+), 0 deletions(-)
> >>  create mode 100644 drivers/usb/gadget/udc-xilinx.c
> >
> > As your driver has a DT binding, you have to describe it in
> > Documentation/devicetree/bindings.
> >
> >> --- a/drivers/usb/gadget/Kconfig
> >> +++ b/drivers/usb/gadget/Kconfig
> >> @@ -459,6 +459,20 @@ config USB_EG20T
> >>         ML7213/ML7831 is companion chip for Intel Atom E6xx series.
> >>         ML7213/ML7831 is completely compatible for Intel EG20T PCH.
> >>
> >> +config USB_GADGET_XILINX
> >> +     tristate "Xilinx USB Driver"
> >> +     depends on COMPILE_TEST
> >
> > Why would you depend on that?
> 
> Felipe asked to make this since this is USB soft IP driver and its
> dependencies have tendency to grow.

that's not exactly what I asked :-) Usually you only add COMPILE_TEST
when you have an ARCH dependency. So something like:

	depends on ARCH_ARM || COMPILE_TEST

would make it clear that this driver is only available on ARM, but when
doing my build tests, I'd still be able to compile it on x86.

> > Also, your code uses device tree functions unconditionally, which is
> > fine, but it must hence depend on 'OF'.
> 
> Ok will add OF along with COMPILE_TEST

so this would be:

	depends on OF || COMPILE_TEST

-- 
balbi

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