x86: OLPC: Cleanup config maze completely

Neither CONFIG_OLPC_OPENFIRMWARE nor CONFIG_OLPC_OPENFIRMWARE_DT are
really necessary.

OLPC selects OLPC_OPENFIRMWARE unconditionally, so move the "select
OF" part under OLPC config option and fixup the dependencies in
Makefiles and code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andres Salomon <dilinger@queued.net>

arch/x86/Kconfig

@@ -2066,9 +2066,10 @@ config SCx200HR_TIMER
 
 config OLPC
 	bool "One Laptop Per Child support"
-	select GPIOLIB
-	select OLPC_OPENFIRMWARE
 	depends on !X86_PAE
+	select GPIOLIB
+	select OF
+	select OLPC_OPENFIRMWARE_DT if PROC_DEVICETREE
 	---help---
 	  Add support for detecting the unique features of the OLPC
 	  XO hardware.
@@ -2079,11 +2080,6 @@ config OLPC_XO1
 	---help---
 	  Add support for non-essential features of the OLPC XO-1 laptop.
 
-config OLPC_OPENFIRMWARE
-	bool
-	select OF
-	select OLPC_OPENFIRMWARE_DT if PROC_DEVICETREE
-
 config OLPC_OPENFIRMWARE_DT
 	bool
 	select OF_PROMTREE

arch/x86/include/asm/olpc_ofw.h

@@ -6,8 +6,6 @@
 
 #define OLPC_OFW_SIG 0x2057464F	/* aka "OFW " */
 
-#ifdef CONFIG_OLPC_OPENFIRMWARE
-
 extern bool olpc_ofw_is_installed(void);
 
 /* run an OFW command by calling into the firmware */
@@ -26,15 +24,6 @@ extern void setup_olpc_ofw_pgd(void);
 /* check if OFW was detected during boot */
 extern bool olpc_ofw_present(void);
 
-#else /* !CONFIG_OLPC_OPENFIRMWARE */
-
-static inline bool olpc_ofw_is_installed(void) { return false; }
-static inline void olpc_ofw_detect(void) { }
-static inline void setup_olpc_ofw_pgd(void) { }
-static inline bool olpc_ofw_present(void) { return false; }
-
-#endif /* !CONFIG_OLPC_OPENFIRMWARE */
-
 #ifdef CONFIG_OLPC_OPENFIRMWARE_DT
 extern void olpc_dt_build_devicetree(void);
 #else

arch/x86/kernel/head_32.S

@@ -137,7 +137,7 @@ ENTRY(startup_32)
 	movsl
 1:
 
-#ifdef CONFIG_OLPC_OPENFIRMWARE
+#ifdef CONFIG_OLPC
 	/* save OFW's pgdir table for later use when calling into OFW */
 	movl %cr3, %eax
 	movl %eax, pa(olpc_ofw_pgd)

arch/x86/platform/olpc/Makefile

@@ -1,4 +1,4 @@
 obj-$(CONFIG_OLPC)		+= olpc.o
 obj-$(CONFIG_OLPC_XO1)		+= olpc-xo1.o
-obj-$(CONFIG_OLPC_OPENFIRMWARE)	+= olpc_ofw.o
+obj-$(CONFIG_OLPC)		+= olpc_ofw.o
 obj-$(CONFIG_OLPC_OPENFIRMWARE_DT)	+= olpc_dt.o