powerpc: Cleanup idle for e500

e500 idle setup is a bit messy.

e500_idle() is used for PPC32 while book3e_idle() is used for PPC64.
As they are mutually exclusive, call them all e500_idle().

Use CONFIG_MPC_85xx instead of PPC32 + E500 in Makefile and rename
idle_e500.c to idle_85xx.c .

Rename idle_book3e.c to idle_64e.c and remove #ifdef PPC64 in
as it's only built on PPC64.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/8039301334e948974c85ec5ef2db37751075185b.1663606876.git.christophe.leroy@csgroup.eu

arch/powerpc/include/asm/machdep.h

@@ -204,7 +204,6 @@ struct machdep_calls {
 extern void e500_idle(void);
 extern void power4_idle(void);
 extern void ppc6xx_idle(void);
-extern void book3e_idle(void);
 
 /*
  * ppc_md contains a copy of the machine description structure for the

arch/powerpc/kernel/Makefile

@@ -81,7 +81,7 @@ obj-$(CONFIG_PPC_DAWR)		+= dawr.o
 obj-$(CONFIG_PPC_BOOK3S_64)	+= cpu_setup_ppc970.o cpu_setup_pa6t.o
 obj-$(CONFIG_PPC_BOOK3S_64)	+= cpu_setup_power.o
 obj-$(CONFIG_PPC_BOOK3S_64)	+= mce.o mce_power.o
-obj-$(CONFIG_PPC_BOOK3E_64)	+= exceptions-64e.o idle_book3e.o
+obj-$(CONFIG_PPC_BOOK3E_64)	+= exceptions-64e.o idle_64e.o
 obj-$(CONFIG_PPC_BARRIER_NOSPEC) += security.o
 obj-$(CONFIG_PPC64)		+= vdso64_wrapper.o
 obj-$(CONFIG_ALTIVEC)		+= vecemu.o
@@ -100,9 +100,7 @@ obj-$(CONFIG_GENERIC_TBSYNC)	+= smp-tbsync.o
 obj-$(CONFIG_CRASH_DUMP)	+= crash_dump.o
 obj-$(CONFIG_FA_DUMP)		+= fadump.o
 obj-$(CONFIG_PRESERVE_FA_DUMP)	+= fadump.o
-ifdef CONFIG_PPC32
+obj-$(CONFIG_PPC_85xx)		+= idle_85xx.o
-obj-$(CONFIG_PPC_E500)		+= idle_e500.o
-endif
 obj-$(CONFIG_PPC_BOOK3S_32)	+= idle_6xx.o l2cr_6xx.o cpu_setup_6xx.o
 obj-$(CONFIG_TAU)		+= tau_6xx.o
 obj-$(CONFIG_HIBERNATION)	+= swsusp.o suspend.o

arch/powerpc/kernel/idle_64e.S

@@ -2,7 +2,7 @@
 /*
  * Copyright 2010 IBM Corp, Benjamin Herrenschmidt <benh@kernel.crashing.org>
  *
- * Generic idle routine for Book3E processors
+ * Generic idle routine for 64 bits e500 processors
  */
 
 #include <linux/threads.h>
@@ -16,8 +16,6 @@
 #include <asm/hw_irq.h>
 
 /* 64-bit version only for now */
-#ifdef CONFIG_PPC64
-
 .macro BOOK3E_IDLE name loop
 _GLOBAL(\name)
 	/* Save LR for later */
@@ -98,6 +96,4 @@ epapr_ev_idle_start:
 
 BOOK3E_IDLE epapr_ev_idle EPAPR_EV_IDLE_LOOP
 
-BOOK3E_IDLE book3e_idle BOOK3E_IDLE_LOOP
+BOOK3E_IDLE e500_idle BOOK3E_IDLE_LOOP
-
-#endif /* CONFIG_PPC64 */

arch/powerpc/platforms/85xx/corenet_generic.c

@@ -200,9 +200,5 @@ define_machine(corenet_generic) {
 #endif
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= udbg_progress,
-#ifdef CONFIG_PPC64
-	.power_save		= book3e_idle,
-#else
 	.power_save		= e500_idle,
-#endif
 };

arch/powerpc/platforms/85xx/qemu_e500.c

@@ -68,9 +68,5 @@ define_machine(qemu_e500) {
 	.get_irq		= mpic_get_coreint_irq,
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= udbg_progress,
-#ifdef CONFIG_PPC64
-	.power_save		= book3e_idle,
-#else
 	.power_save		= e500_idle,
-#endif
 };