linux-kernel - Re: Dead Kconfig Option OMAP4_ERRATA

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Message-ID: <20150225171451.GQ11056@atomide.com>
Date:	Wed, 25 Feb 2015 09:14:51 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Stefan Hengelein <stefan.hengelein@....de>
Cc:	linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	Greg KH <gregkh@...uxfoundation.org>,
	santosh shilimkar <santosh.shilimkar@...cle.com>
Subject: Re: Dead Kconfig Option OMAP4_ERRATA_I688

Hi,

Adding Santosh to Cc on this one.

* Stefan Hengelein <stefan.hengelein@....de> [150225 09:13]:
> During the research for my masters thesis i came across the
> OMAP4_ERRATA_I688 option and realized, it is never possible to enable
> this option.
> 
> The a62a6e98 commit added the "&& !ARCH_MULTIPLATFORM" dependency to
> disable this option for multiplatforms. However, because of enclosing
> dependencies, this option isn't available for non-MULTIPLATFORM
> configurations either.

Yes there is no clean way currently to enable this errata for
multiplatform.
 
> CONFIG_OMAP4_ERRATA_I688 is defined in the menu "TI OMAP/AM/DM/DRA
> Family" which depends on ARCH_MULTI_V6 || ARCH_MULTI_V7. (in
> arch/arm/mach-omap2/Kconfig)
> 
> ARCH_MULTI_V6 and ARCH_MULTI_V7 however are defined in the menu
> "Multiple platform selection" which depends on ARCH_MULTIPLATFORM (in
> arch/arm/Kconfig)
> 
> Which is a contradiction.
> 
> There are no selects on OMAP4_ERRATA_I688, which would ignore
> dependencies, either.
> 
> The question is:
> Was disabling this option for non-MULTIPLATFORM configurations also intentional?
> 
> i have added a minimal example of the problem.

>From what I remember the plan was to try to come up with a
multiplatform friendly way of doing this errata. Santosh,
any suggestions here? Should we just remove the code as it
seems nobody has complained about it for a few years now?

Regards,

Tony
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