powerpc/4xx: Add suspend and idle support

Add suspend/resume support for 4xx compatible CPUs.
See /sys/power/state for available power states configured in.

Add two different idle states (idle-wait and idle-doze) controlled via sysfs.
Default is idle-wait.
	cat /sys/devices/system/cpu/cpu0/idle
	[wait] doze

To save additional power, use idle-doze.
	echo doze > /sys/devices/system/cpu/cpu0/idle
	cat /sys/devices/system/cpu/cpu0/idle
	wait [doze]

Signed-off-by: Victor Gallardo <vgallardo@apm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 06d742c3fbcf..e16b4988f825 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -212,7 +212,7 @@ config ARCH_HIBERNATION_POSSIBLE
 config ARCH_SUSPEND_POSSIBLE
         def_bool y
         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
-                   PPC_85xx || PPC_86xx || PPC_PSERIES
+                   PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
 
 config PPC_DCR_NATIVE
         bool
@@ -598,13 +598,11 @@ config EXTRA_TARGETS
 
           If unsure, leave blank
 
-if !44x || BROKEN
 config ARCH_WANTS_FREEZER_CONTROL
         def_bool y
         depends on ADB_PMU
 
 source kernel/power/Kconfig
-endif
 
 config SECCOMP
         bool "Enable seccomp to safely compute untrusted bytecode"
@@ -685,6 +683,15 @@ config FSL_PMC
           Freescale MPC85xx/MPC86xx power management controller support
           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 
+config PPC4xx_CPM
+        bool
+        default y
+        depends on SUSPEND && (44x || 40x)
+        help
+          PPC4xx Clock Power Management (CPM) support (suspend/resume).
+          It also enables support for two different idle states (idle-wait
+          and idle-doze).
+
 config 4xx_SOC
         bool