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

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Date:	Wed, 20 Oct 2010 19:22:17 +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

On Wed, Oct 20, 2010 at 6:15 PM, Felipe Balbi <balbi@...com> wrote:
> On Wed, Oct 20, 2010 at 09:52:06AM -0500, Felipe Contreras wrote:
>>
>> TWL4030_USB is inside drivers/usb/Kconfig and drivers/usb/otg/Kconfig,
>> which means in order to achieve the same on the board config you would
>> have to do:
>>
>> default y if USB_SUPPORT && (USB || USB_GADGET) && ARCH_OMAP3
>>
>> Seems to be more convoluted to me.
>>
>> Besides, I think TWL4030_USB and the full description of it doesn't
>> give any hints to the people reading drivers/usb/otg/Kconfig what is
>> it used for. 'default y if ARCH_OMAP3' achieves that.
>
> no it doesn't. No user will 'cat drivers/usb/otg/Kconfig | grep -A 10
> TWL4030' and check the 'default y if ARCH_OMAP3
>
> if you think help is not enough, fix help.

Users would not need to care... if they enable USB and USB_GADGET, it
will be selected automatically for OMAP3, which is what users would
expect.

I was talking more about developers.

How should the help be fixed?
"Select y if you are using an OMAP3 system that has TWL4030"

>> Plus, there is no big change:
>>
>> config USB_MUSB_HDRC
>> -       select TWL4030_USB if MACH_OMAP_3430SDP
>>
>> config TWL4030_USB
>> +       default y if ARCH_OMAP3
>>
>
> what's the problem with:
>
> diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
> index ab784bf..3af9580 100644
> --- a/arch/arm/mach-omap2/Kconfig
> +++ b/arch/arm/mach-omap2/Kconfig
> @@ -215,6 +215,7 @@ config MACH_NOKIA_RX51
>        depends on ARCH_OMAP3
>        default y
>        select OMAP_PACKAGE_CBB
> +       select TWL4030_USB
>  config MACH_OMAP_ZOOM2
>        bool "OMAP3 Zoom2 board"
>

1) Do you think all the OMAP3 boards should add that?
2) What if you don't want to use USB?

-- 
Felipe Contreras
--
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