linux-kernel - Kconfig with multiple sources of integer value

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Message-ID: <20100111083002.GA24987@trinity.fluff.org>
Date:	Mon, 11 Jan 2010 08:30:02 +0000
From:	Ben Dooks <ben-linux@...ff.org>
To:	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Kconfig with multiple sources  of integer value

I have a situation (and possibly some more) where having the ability
for multiple options to affect an integer value, in this case ensuring
a minimum value.

currently we have the following:

config S3C24XX_GPIO_EXTRA
        int
        default 128 if S3C24XX_GPIO_EXTRA128
        default 64 if S3C24XX_GPIO_EXTRA64
        default 0

and various machines select S3C24XX_GPIO_EXTRA64 or S3C24XX_GPIO_EXTR128
such as:

config MACH_OSIRIS
       ...
        select S3C24XX_GPIO_EXTRA128


It would be nice if I could say

config S3C24XX_GPIO_EXTRA

and then

config MACH_OSIRIS
       ...
       set_min S3C24XX_GPIO_EXTRA 128

or something similar.


-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.

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