From mboxrd@z Thu Jan  1 00:00:00 1970
From: Reinhard Meyer <u-boot@emk-elektronik.de>
Date: Fri, 05 Nov 2010 13:30:09 +0100
Subject: [U-Boot] Weak symbols: request for comments
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References: <4CD3DEFC.7010104@gmail.com> <4CD3E7A4.4000109@emk-elektronik.de>
	<4CD3F58F.8090302@gmail.com>
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To: u-boot@lists.denx.de

Dear Sebastien,
>>> Are there better options?  Which one would you prefer to see
>>> implemented?
>>>      
>> Yes. The old-fashioned #define CONFIG_BOARD_INIT_F and friends
>> method. I would prefer that one. Its not beautiful but still
>> widely used and bullet-proof.
>>    
> 
> Could you please elaborate?  I have looked for things like this in the
> code base but I could not find what you are referring to.

extracts from arch/arm/lib/board.c:

#if defined(CONFIG_ARCH_CPU_INIT)
	arch_cpu_init,		/* basic arch cpu dependent setup */
#endif
#if defined(CONFIG_BOARD_EARLY_INIT_F)
	board_early_init_f,
#endif
#if defined(CONFIG_ARCH_MISC_INIT)
	/* miscellaneous arch dependent initialisations */
	arch_misc_init ();
#endif
#if defined(CONFIG_MISC_INIT_R)
	/* miscellaneous platform dependent initialisations */
	misc_init_r ();
#endif
#ifdef BOARD_LATE_INIT
	board_late_init ();
#endif
#if defined(CONFIG_RESET_PHY_R)
	debug ("Reset Ethernet PHY\n");
	reset_phy();
#endif

Just a few that can be "enabled" by board specific defines.

"xxxboard".h #defines them and "xxxboard.c" has to implement them.

Best Regards,
Reinhard