Re: [PATCH v2 2/2] mach-ux500: Add CG2900 devices

[Arnd Bergmann <arnd@arndb.de>]

On Monday 28 March 2011, Greg KH wrote:
> > 
> > But how should I then do this? As I understood it I was told that I should
> > call an init function, but I was not allowed to add any staging folder
> > inclusion in the board config makefile. And now I can't do any extern
> > declaration either. I don't really see how I could do it then.
> 
> Why can't you add a staging folder inclusion?  You could do that, and
> properly set up your .h file so that if the driver is not built, your
> code still properly builds and runs.

That would work as well, along with the two solutions I suggested.

I believe Pär-Gunnar was trying to avoid #ifdefs, and the patch actually
contains alternative files implementing cg2900_init_board as a stub
when CONFIG_CG2900 is set, so the intent was clearly there:

@@ -0,0 +1,18 @@
+#
+# Makefile for ST-Ericsson CG2900 connectivity combo controller
+#
+
+ccflags-y :=                                   \
+       -Idrivers/staging/cg2900/include \
+       -Iarch/arm/mach-ux500
+
+ifeq ($(CONFIG_CG2900),n)
+obj-y  += board-mop500-nocg2900.o
+export-objs                    := board-mop500-nocg2900.o
+else
+obj-$(CONFIG_CG2900)   += board-mop500-cg2900.o devices-cg2900.o
+export-objs                    := board-mop500-cg2900.o
+endif
+

I don't think that this works though, because the directory
is ignored when CONFIG_CG2900 is not set, and if it did work,
it would cause an empty function to be included in every
single kernel, not even limited to the ARM architecture.

	Arnd