ARM: OMAP4: PM: Program CPU1 to hit OFF when off-lined
Program non-boot CPUs to hit lowest supported power state
when it is off-lined using cpu hotplug framework.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
index a8a8d0e..701dfec 100644
--- a/arch/arm/mach-omap2/omap-wakeupgen.c
+++ b/arch/arm/mach-omap2/omap-wakeupgen.c
@@ -180,6 +180,36 @@
spin_unlock_irqrestore(&wakeupgen_lock, flags);
}
+#ifdef CONFIG_HOTPLUG_CPU
+static int __cpuinit irq_cpu_hotplug_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (unsigned int)hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ wakeupgen_irqmask_all(cpu, 0);
+ break;
+ case CPU_DEAD:
+ wakeupgen_irqmask_all(cpu, 1);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block __refdata irq_hotplug_notifier = {
+ .notifier_call = irq_cpu_hotplug_notify,
+};
+
+static void __init irq_hotplug_init(void)
+{
+ register_hotcpu_notifier(&irq_hotplug_notifier);
+}
+#else
+static void __init irq_hotplug_init(void)
+{}
+#endif
+
/*
* Initialise the wakeupgen module.
*/
@@ -222,5 +252,7 @@
for (i = 0; i < NR_IRQS; i++)
irq_target_cpu[i] = boot_cpu;
+ irq_hotplug_init();
+
return 0;
}