ARC: [Review] Multi-platform image #4: Isolate platform headers

-Top level ARC makefile removes -I for platform headers
-asm/irq.h no longer includes plat/irq.h

-platform makefile adds -I for it's specfic platform headers
-platform code to directly include it's plat/irq.h

-Linker script needed plat/memmap.h for CCM info, already in .config

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arc/Makefile

@@ -10,14 +10,6 @@ UTS_MACHINE := arc
 
 KBUILD_DEFCONFIG := fpga_defconfig
 
-# For ARC FPGA Platforms
-platform-$(CONFIG_ARC_PLAT_FPGA_LEGACY)	:= arcfpga
-#New platform adds here
-
-PLATFORM := $(platform-y)
-export PLATFORM
-
-cflags-y	+= -Iarch/arc/plat-$(PLATFORM)/include
 cflags-y	+= -mA7 -fno-common -pipe -fno-builtin -D__linux__
 
 LINUXINCLUDE	+=  -include ${src}/arch/arc/include/asm/defines.h
@@ -86,9 +78,6 @@ KBUILD_CFLAGS	+= $(cflags-y)
 KBUILD_AFLAGS	+= $(KBUILD_CFLAGS)
 LDFLAGS		+= $(ldflags-y)
 
-# Needed for Linker script preprocessing
-KBUILD_CPPFLAGS	+= -Iarch/arc/plat-$(PLATFORM)/include
-
 head-y		:= arch/arc/kernel/head.o
 
 # See arch/arc/Kbuild for content of core part of the kernel
@@ -97,10 +86,7 @@ core-y		+= arch/arc/
 # w/o this dtb won't embed into kernel binary
 core-y		+= arch/arc/boot/dts/
 
-# w/o this ifneq, make ARCH=arc clean was crapping out
-ifneq ($(platform-y),)
-core-y		+= arch/arc/plat-$(PLATFORM)/
-endif
+core-$(CONFIG_ARC_PLAT_FPGA_LEGACY)	+= arch/arc/plat-arcfpga/
 
 drivers-$(CONFIG_OPROFILE)	+= arch/arc/oprofile/
 

arch/arc/include/asm/irq.h

@@ -13,7 +13,6 @@
 #define TIMER0_IRQ      3
 #define TIMER1_IRQ      4
 
-#include <plat/irq.h>		/* Board Specific IRQ assignments */
 #include <asm-generic/irq.h>
 
 extern void __init arc_init_IRQ(void);

arch/arc/kernel/vmlinux.lds.S

@@ -10,7 +10,6 @@
 #include <asm/cache.h>
 #include <asm/page.h>
 #include <asm/thread_info.h>
-#include <plat/memmap.h>
 
 OUTPUT_ARCH(arc)
 ENTRY(_stext)

arch/arc/plat-arcfpga/Makefile

@@ -6,5 +6,7 @@
 # published by the Free Software Foundation.
 #
 
+KBUILD_CFLAGS	+= -Iarch/arc/plat-arcfpga/include
+
 obj-y := platform.o irq.o
 obj-$(CONFIG_SMP)		+= smp.o

arch/arc/plat-arcfpga/irq.c

@@ -9,7 +9,7 @@
  */
 
 #include <linux/interrupt.h>
-#include <asm/irq.h>
+#include <plat/irq.h>
 
 void __init plat_fpga_init_IRQ(void)
 {

arch/arc/plat-arcfpga/platform.c

@@ -16,11 +16,11 @@
 #include <linux/console.h>
 #include <linux/of_platform.h>
 #include <asm/setup.h>
-#include <asm/irq.h>
 #include <asm/clk.h>
 #include <asm/mach_desc.h>
 #include <plat/memmap.h>
 #include <plat/smp.h>
+#include <plat/irq.h>
 
 /*-----------------------BVCI Latency Unit -----------------------------*/
 

arch/arc/plat-arcfpga/smp.c

@@ -12,7 +12,8 @@
  */
 
 #include <linux/smp.h>
-#include <asm/irq.h>
+#include <linux/irq.h>
+#include <plat/irq.h>
 #include <plat/smp.h>
 
 static char smp_cpuinfo_buf[128];