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

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Date:	Tue, 19 Oct 2010 10:06:33 -0700
From:	Kevin Hilman <khilman@...prootsystems.com>
To:	Anand Gadiyar <gadiyar@...com>
Cc:	Greg KH <greg@...ah.com>,
	Felipe Contreras <felipe.contreras@...il.com>,
	linux-usb@...r.kernel.org, linux-omap <linux-omap@...r.kernel.org>,
	linux-main <linux-kernel@...r.kernel.org>,
	Felipe Balbi <balbi@...com>, Tony Lindgren <tony@...mide.com>
Subject: Re: [PATCH v2 3/3] drivers: cleanup Kconfig stuff

Anand Gadiyar <gadiyar@...com> writes:

> On 10/19/2010 9:22 PM, Greg KH wrote:
>> On Tue, Oct 19, 2010 at 01:03:28PM +0300, Felipe Contreras wrote:
>>> Add missing dependencies, and remove redundant ones, and select sensible
>>> defaults.
>>>
>>> Signed-off-by: Felipe Contreras<felipe.contreras@...il.com>
>>> ---
>>>   drivers/mfd/Kconfig        |    3 ++-
>>>   drivers/regulator/Kconfig  |    1 +
>>>   drivers/usb/gadget/Kconfig |    3 +--
>>>   drivers/usb/musb/Kconfig   |    6 ++----
>>>   drivers/usb/otg/Kconfig    |    2 ++
>>>   5 files changed, 8 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>>> index db51ea1..0bbaf01 100644
>>> --- a/drivers/mfd/Kconfig
>>> +++ b/drivers/mfd/Kconfig
>>> @@ -156,6 +156,7 @@ config MENELAUS
>>>   config TWL4030_CORE
>>>   	bool "Texas Instruments TWL4030/TWL5030/TWL6030/TPS659x0 Support"
>>>   	depends on I2C=y&&  GENERIC_HARDIRQS
>>> +	default y if ARCH_OMAP3 || ARCH_OMAP4
>>
>> Sorry, but unless the driver is somehow required to keep the board from
>> going up in a puff of smoke, a default should NEVER be y.
>>
>> Because of that, I can't take this patch.
>>
>
> This is the driver for the Power-management IC on the board. Without
> this IC being correctly configured, I'm guessing a lot of things will
> fail. Not so sure if anything will go up in smoke (sounds unlikely),
> or if the kernel will fail to boot - I'll check quickly - but for this
> one specific instance, I think it's reasonable to accept a default y.
>
> Kevin/Tony can probably confirm.

I don't thing the 'default y' should be done at this level.  Instead,
the boards/SoCs that have the hard requirement should do the 'select'

Kevin
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