[PATCH 2/2] ARM: allow for ATAGS to be configured out when DT support is selected

On Thursday 30 August 2012, Nicolas Pitre wrote:

Now that ATAGS support is well contained, we can easily remove it from
the kernel build if so desired.  It has to explicitly be disabled, and
only when DT support is selected.

Note: disabling kernel ATAGS support does not prevent the usage of
CONFIG_ARM_ATAG_DTB_COMPAT.

...

+config ATAGS
+	bool "Support for the traditional ATAGS boot data passing" if USE_OF
+	default y
+	help
+	  This is the traditional way of passing data to the kernel at boot
+	  time. If you are solely relying on the flattened device tree (or
+	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
+	  to remove ATAGS support from your kernel binary.  If unsure,
+	  leave this to y.

That's a clever way of implementing it, I had not though of making it an
optional default-y symbol.

Acked-by: Arnd Bergmann <arnd@arndb.de>

Should we do patches to the individual platforms bsaed on this to disable
the ATAG based board files when CONFIG_ATAG is disabled?

	Arnd