[U-Boot] [U-Boot, v3, 15/15] of: clean up OF_CONTROL ifdef conditionals

[Masahiro Yamada]

Hi Marek,




2015-08-20 6:15 GMT+09:00 Marek Vasut <marex at denx.de>:
> On Wednesday, August 19, 2015 at 02:02:18 PM, Tom Rini wrote:
>> On Wed, Aug 19, 2015 at 06:39:29AM +0200, Marek Vasut wrote:
>> > On Tuesday, August 18, 2015 at 07:53:23 PM, Tom Rini wrote:
>> > > On Wed, Aug 12, 2015 at 07:31:55AM +0900, Masahiro Yamada wrote:
>> > > > We have flipped CONFIG_SPL_DISABLE_OF_CONTROL.  We have cleansing
>> > > > devices, $(SPL_) and CONFIG_IS_ENABLED(), so we are ready to clear
>> > > >
>> > > > away the ugly logic in include/fdtdec.h:
>> > > >  #ifdef CONFIG_OF_CONTROL
>> > > >  # if defined(CONFIG_SPL_BUILD) && !defined(SPL_OF_CONTROL)
>> > > >  #  define OF_CONTROL 0
>> > > >  # else
>> > > >  #  define OF_CONTROL 1
>> > > >  # endif
>> > > >  #else
>> > > >  # define OF_CONTROL 0
>> > > >  #endif
>> > > >
>> > > > Now CONFIG_IS_ENABLED(OF_CONTROL) is the substitute.  It refers to
>> > > > CONFIG_OF_CONTROL for U-boot proper and CONFIG_SPL_OF_CONTROL for
>> > > > SPL.
>> > > >
>> > > > Also, we no longer have to cancel CONFIG_OF_CONTROL in
>> > > > include/config_uncmd_spl.h and scripts/Makefile.spl.
>> > > >
>> > > > Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
>> > > > Reviewed-by: Tom Rini <trini at konsulko.com>
>> > > > Reviewed-by: Simon Glass <sjg at chromium.org>
>> > > > Acked-by: Linus Walleij <linus.walleij at linaro.org>
>> > >
>> > > (With a slight change due to samsun PR, but applied cleanly after
>> > > rename)
>> > > Applied to u-boot/master, thanks!
>> >
>> > And this just broke just about every SoCFPGA platform (try ie.
>> > socfpga_cyclone5) ;-) I poked into this a bit and noticed that adding
>> > #include <linux/kconfig.h> into include/configs/socfpga_common.h fixes
>> > the issue, but I'd like to check with you if this is the correct way of
>> > fixing it.
>>
>> Broke it how?
>> $ ./tools/buildman/buildman socfpga_cyclone5
>> boards.cfg is up to date. Nothing to do.
>> Building current source for 1 boards (1 thread, 6 jobs per thread)
>>     1    0    0 /1      socfpga_cyclone5
>
> Looks like I wasn't really accurate and mainline actually managed to avoid
> this breakage. I only triggered it with a custom patch, which enables env
> in SPI NOR (see the spit below).
>
> I suspect the problem is caused by tools/envcrc.c, which does include the
> board config file (which uses this CONFIG_IS_ENABLED()), but does not include
> a header file which defines it.
>
> The question therefore is, shall we not used CONFIG_IS_ENABLED() in board
> config files or shall we include linux/kconfig.h in tools/envcrc.c ?
>


Our final goal is:
    We should not use any CONFIG_* in host tools.
    Actually, some host tools in U-boot depend on the board
configuration, which is weird.
  If we could rip off CONFIG_* from them, neither CONFIG_IS_ENABLED()
nor linux/kconfig.h
  is needed for host tools.  I believe this is the right thing to do.
    Any volunteer?


What I can suggest now is:
    Do not use CONFIG_IS_ENABLED() in board config headers.


include/config/microblaze-generic.h does this:

#if !defined(CONFIG_OF_CONTROL) || \
(defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_OF_CONTROL))
/* ddr sdram - main memory */
# define CONFIG_SYS_SDRAM_BASE XILINX_RAM_START
# define CONFIG_SYS_SDRAM_SIZE XILINX_RAM_SIZE
#endif


This is indeed ugly, but works...




-- 
Best Regards
Masahiro Yamada