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authorSantosh Shilimkar <santosh.shilimkar@ti.com>2010-06-16 20:49:48 +0400
committerKevin Hilman <khilman@ti.com>2011-12-08 23:29:00 +0400
commitb5b4f2881f619460fdb165111bac10a3dd8eebee (patch)
tree2f41f00e91f11ef77ff47dd0f65fc31b67aeb9c7 /arch/arm/mach-omap2/omap-wakeupgen.c
parenta6e48358d15fec2f3f9e86a6d6fc62422141a3a9 (diff)
downloadlinux-b5b4f2881f619460fdb165111bac10a3dd8eebee.tar.xz
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>
Diffstat (limited to 'arch/arm/mach-omap2/omap-wakeupgen.c')
-rw-r--r--arch/arm/mach-omap2/omap-wakeupgen.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
index a8a8d0efe350..701dfecad64b 100644
--- a/arch/arm/mach-omap2/omap-wakeupgen.c
+++ b/arch/arm/mach-omap2/omap-wakeupgen.c
@@ -180,6 +180,36 @@ static void wakeupgen_irqmask_all(unsigned int cpu, unsigned int set)
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 @@ int __init omap_wakeupgen_init(void)
for (i = 0; i < NR_IRQS; i++)
irq_target_cpu[i] = boot_cpu;
+ irq_hotplug_init();
+
return 0;
}