[U-Boot] [RFC] ARM: omap3: Add option to disable errata workarounds.

[Andreas Naumann <dev@andin.de>]

Hi,

It seems that all three ARM errata workarounds done in omap3 board-init 
(#454179 #430973 #621766) are solved/not longer needed e.g. in the 
AM/DM37xx chips. Other people have noticed this:
http://e2e.ti.com/support/arm/sitara_arm/f/791/t/254742.aspx

When still applying them (especcially #430973), lots of segmentations 
faults and other strange stuff begin to appear.
So as a simple solution I propose adding a config option to remove these 
workarounds for boards/silicon that dont need them. Is this sensible or 
should there be more automatism?


regards,
Andreas


PS. Does anybody have the "ARM Core Cortex-A8 (AT400/AT401) errata" 
document to make sure my assumption above holds true?



---
  arch/arm/cpu/armv7/omap3/board.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/arch/arm/cpu/armv7/omap3/board.c 
b/arch/arm/cpu/armv7/omap3/board.c
index b72fadc..84045d8 100644
--- a/arch/arm/cpu/armv7/omap3/board.c
+++ b/arch/arm/cpu/armv7/omap3/board.c
@@ -236,8 +236,10 @@ void s_init(void)

  	try_unlock_memory();

+#ifndef CONFIG_SYS_DISABLE_CORTEXA8_ERRATA_WORKAROUNDS
  	/* Errata workarounds */
  	omap3_setup_aux_cr();
+#endif

  #ifndef CONFIG_SYS_L2CACHE_OFF
  	/* Invalidate L2-cache from secure mode */
-- 
1.8.3.1