[U-Boot] Kconfig for SPL

[Masahiro Yamada]

2015-07-20 11:32 GMT+09:00 Simon Glass <sjg at chromium.org>:
> HI Masahiro,
>
> In my fiddling with Rockchip in SPL I found that the current single
> config is simple, but a little too limited. You discussed this briefly
> with someone from Marvell also. At present we effectively have two
> options:
>
> 1. decide for all boards that a uclass should be supported in SPL (and
> put it in Makefile.spl, or not)
>
> 2. ugly #undefs to try to fix things up after the fact (i.e. #ifdef
> CONFIG_SPL_BUILD...#undef CONFIG_PINCTRL)
>
> You mentioned the idea of allowing something like this:
>
> spl-$(CONFIG_FRED) += file.o
>
> In practice I assume you would generate two config headers from the
> same input: one for SPL and one for U-Boot proper.
>
> Another option would be to allow several states for the same config.
> At present in the .config files we have:
>
> CONFIG_FRED=y
>
> We could allow:
>
> CONFIG_FRED=yyn
>
> meaning yes for U-Boot proper, yes for SPL, no for TPL (assuming these
> are enabled for the board). For this we would need a new type, similar
> to tristate which allows cycling through the options.
>
> In the Makefile we could have
>
> obj-$(CONFIG_FRED) += file.o
>
> and then Kbuild would do the right thing - i.e. include the file for
> U-Boot proper, SPL but not TPL.
>
> What do you think about this? I fear that we need to figure something out...


Please see this.

http://lists.denx.de/pipermail/u-boot/2015-July/220212.html





-- 
Best Regards
Masahiro Yamada