Subject: [PATCH] ARM: Push selects for TWD/SCU into machine entries

From: [email-masked] (Simon Horman)
Date: Fri, 5 Oct 2012 10:12:37 +0900

On Thu, Oct 04, 2012 at 02:41:46PM +0530, Santosh Shilimkar wrote:
> On Thursday 04 October 2012 02:20 PM, Stephen Boyd wrote:
> >The TWD and SCU configs are selected by default as long as
> >SCORPIONMP is false and/or MCT is false. Implementing the logic
> >this way certainly saves lines in the Kconfig but it precludes
> >those machines which select SCORPIONMP or MCT from participating
> >in the single zImage effort because when those machines are
> >combined with other SMP capable machines the TWD and SCU are no
> >longer selected.
> >
> >Push the select out to the machine entries so that we can compile
> >these machines together and still select the appropriate configs.
> >
> >Signed-off-by: Stephen Boyd<[email-masked]>
> >Cc: David Brown<[email-masked]>
> >Cc: Kukjin Kim<[email-masked]>
> >Cc: Linus Walleij<[email-masked]>
> >Cc: Pawel Moll<[email-masked]>
> >Cc: Rob Herring<[email-masked]>
> >Cc: Russell King<[email-masked]>
> >Cc: Sascha Hauer<[email-masked]>
> >Cc: Shiraz Hashim<[email-masked]>
> >Cc: Simon Horman<[email-masked]>
> >Cc: Srinidhi Kasagar<[email-masked]>
> >Cc: Stephen Warren<[email-masked]>
> >Cc: Tony Lindgren<[email-masked]>
> >Cc: Viresh Kumar<[email-masked]>
> >---
> >
> >Does OMAP5 need to select TWD? I suspect not if it uses the
> >architected timers.
> >
> Nope. OMAP5 don't use TWD. Infact the external SCU is also used
> for A9 SOCs. You might want to check other A15 SOCS for SCU as
> well.

In that case I am a bit confused by the following result:

# git checkout v3.6
# ARCH=arm make omap2plus_defconfig
# grep '(SOC_OMAP5|_SCU|_TWD|CONFIG_SMP|CONFIG_LOCAL_TIMERS)=' .config
CONFIG_SOC_OMAP5=y
CONFIG_SMP=y
CONFIG_HAVE_ARM_SCU=y
CONFIG_HAVE_ARM_TWD=y
CONFIG_LOCAL_TIMERS=y