ARM: mvebu: Register notifier callback for the cpuidle transition

In order to have well encapsulated code, we use notifier callbacks for
CPU_PM_ENTER and CPU_PM_EXIT inside the mvebu power management code.
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1397488214-20685-10-git-send-email-gregory.clement@free-electrons.comAcked-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

arch/arm/mach-mvebu/pmsu.c

@@ -18,6 +18,7 @@
 
 #define pr_fmt(fmt) "mvebu-pmsu: " fmt
 
+#include <linux/cpu_pm.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/of_address.h>
@@ -240,4 +241,21 @@ static noinline void armada_370_xp_pmsu_idle_restore(void)
 	writel(reg, pmsu_mp_base + PMSU_STATUS_AND_MASK(hw_cpu));
 }
 
+static int armada_370_xp_cpu_pm_notify(struct notifier_block *self,
+				    unsigned long action, void *hcpu)
+{
+	if (action == CPU_PM_ENTER) {
+		unsigned int hw_cpu = cpu_logical_map(smp_processor_id());
+		mvebu_pmsu_set_cpu_boot_addr(hw_cpu, armada_370_xp_cpu_resume);
+	} else if (action == CPU_PM_EXIT) {
+		armada_370_xp_pmsu_idle_restore();
+	}
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block armada_370_xp_cpu_pm_notifier = {
+	.notifier_call = armada_370_xp_cpu_pm_notify,
+};
+
 early_initcall(armada_370_xp_pmsu_init);