Re: [PATCH v12 05/11] edma: config: Enable config options for EDMA

[Joel A Fernandes <agnel.joel@gmail.com>]

On Fri, Jun 21, 2013 at 9:32 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Friday 21 June 2013, Joel A Fernandes wrote:
>> I haven't come across this problem but- are you saying there is a
>> shortcoming in Kbuild/Kconfig that selects an option even if its
>> dependency is not met?
>
> Well, the shortcoming is that it lets you specify impossible
> contraints. You get a warning from Kconfig when building
> such a configuration, but then it continues.
>
>> The problem with defconfig is also too many options I feel for a common case.
>> CONFIG_DMADEVICES=y
>> CONFIG_TI_EDMA=y
>>
>> Most if not all future OMAPs from will use EDMA. Why not we can be
>> explicit about it and just built it in anyway. If ARCH_OMAP and
>> DMADEVICES are selected, then we can just build EDMA in by default.
>
> It's just not how we do things. Kconfig is a mess because we are
> not consistent in the way this is done.
>
>> I agree maybe the option can be dropped from Davinci but I suggest
>> let's keep it for OMAP. Is that ok?
>
> No, I would still like you to not add it to either one. I'm spending
> a lot of my time tracking down incorrect 'select' statements and I'd
> rather spend it in a different way. I've had to a number of 'select'
> statements from OMAP in the past, please don't add any new ones
> unless there is a strict build dependency (which normally should not
> exist).

I think we are talking about different things, I agree the 'select
DMADEVICES' can be dropped but lets please keep the default y option
(not adding new select statements, just saying that if someone select
DMADEVICES in menuconfig and if they're ARCH_OMAP=1 , then default to
EDMA). This will simply allow people to have a default. Thanks.

Thanks
Joel