linux-kernel - Re: [PATCH v2 3/3] drivers: cleanup Kconfig stuff

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Date:	Thu, 21 Oct 2010 13:55:20 +0300
From:	Felipe Contreras <felipe.contreras@...il.com>
To:	balbi@...com
Cc:	Roger Quadros <roger.quadros@...ia.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	linux-omap <linux-omap@...r.kernel.org>,
	linux-main <linux-kernel@...r.kernel.org>,
	Greg KH <greg@...ah.com>, Tony Lindgren <tony@...mide.com>
Subject: Re: [PATCH v2 3/3] drivers: cleanup Kconfig stuff

Hi,

On Thu, Oct 21, 2010 at 1:24 PM, Felipe Balbi <balbi@...com> wrote:
> On Thu, Oct 21, 2010 at 04:04:27AM -0500, Felipe Contreras wrote:
>>>
>>> wouldn't a user expect USB to be enabled if the board _has_ a USB
>>> connector ?
>>
>> Not if it's not going to be used.
>
> and how would you know before hand if it's going to be used or not ?

You don't, that's what Kconfig is for: so the user can dynamically
select what he wants or not on the kernel. And in order for it to be
useful, dependencies have to be correct.

>>>> 1) Do you think all the OMAP3 boards should add that?
>>>
>>> why not ?
>>
>> You prefer a patch that adds one line per board rather than a patch
>> that adds one line in total... That is exactly the opposite of Linus's
>> complaint regarding big ARM changesets.
>
> The thing is that what you are proposing will not scale when we have too
> many boards with different transceivers. Then we will end up with things
> like:
>
> config USB_ARCH_HAS_OHCI

[...]

We are not talking about USB_ARCH_HAS_OHCI, we are talking about
TWL4030_USB, there's nothing to scale there.

-- 
Felipe Contreras
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