ARM: omap1: fix build with no SoC selected

In a multiplatform randconfig kernel, one can have
CONFIG_ARCH_OMAP1 enabled, but none of the specific SoCs.
This leads to some build issues as the code is not
meant to deal with this configuration at the moment:

arch/arm/mach-omap1/io.c:86:20: error: unused function 'omap1_map_common_io' [-Werror,-Wunused-function]
arch/arm/mach-omap1/pm.h:113:2: error: "Power management for this processor not implemented yet" [-Werror,-W#warnings]

Use the same trick as on OMAP2 and guard the actual compilation
of platform code with another Makefile ifdef check based
on an option that depends on having at least one SoC enabled.

The io.c file still needs to get compiled to allow building
device drivers with a dependency on CONFIG_ARCH_OMAP1.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/Kconfig

@@ -485,7 +485,6 @@ config ARCH_S3C24XX
 
 config ARCH_OMAP1
 	bool "TI OMAP1"
-	select ARCH_OMAP
 	select CLKSRC_MMIO
 	select FORCE_PCI if PCCARD
 	select GENERIC_IRQ_CHIP

arch/arm/mach-omap1/Kconfig

@@ -28,6 +28,10 @@ config ARCH_OMAP16XX
 	select CPU_ARM926T
 	select OMAP_DM_TIMER
 
+config ARCH_OMAP1_ANY
+	select ARCH_OMAP
+	def_bool ARCH_OMAP730 || ARCH_OMAP850 || ARCH_OMAP15XX || ARCH_OMAP16XX
+
 config ARCH_OMAP
 	bool
 

arch/arm/mach-omap1/Makefile

@@ -3,6 +3,8 @@
 # Makefile for the linux kernel.
 #
 
+ifdef CONFIG_ARCH_OMAP1_ANY
+
 # Common support
 obj-y := io.o id.o sram-init.o sram.o time.o irq.o mux.o flash.o \
 	 serial.o devices.o dma.o omap-dma.o fb.o
@@ -57,3 +59,5 @@ obj-$(CONFIG_ARCH_OMAP730)		+= gpio7xx.o
 obj-$(CONFIG_ARCH_OMAP850)		+= gpio7xx.o
 obj-$(CONFIG_ARCH_OMAP15XX)		+= gpio15xx.o
 obj-$(CONFIG_ARCH_OMAP16XX)		+= gpio16xx.o
+
+endif

include/linux/soc/ti/omap1-io.h

@@ -5,7 +5,7 @@
 #ifndef __ASSEMBLER__
 #include <linux/types.h>
 
-#if defined(CONFIG_ARCH_OMAP) && defined(CONFIG_ARCH_OMAP1)
+#ifdef CONFIG_ARCH_OMAP1_ANY
 /*
  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
  */
@@ -15,7 +15,7 @@ extern u32 omap_readl(u32 pa);
 extern void omap_writeb(u8 v, u32 pa);
 extern void omap_writew(u16 v, u32 pa);
 extern void omap_writel(u32 v, u32 pa);
-#elif defined(CONFIG_COMPILE_TEST)
+#else
 static inline u8 omap_readb(u32 pa)  { return 0; }
 static inline u16 omap_readw(u32 pa) { return 0; }
 static inline u32 omap_readl(u32 pa) { return 0; }