X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=arch%2Farm64%2Fkernel%2Fcpuidle.c;h=9047cab68fd3494ebf1c634f137fddcfde955932;hb=c2b3e8740d8dcadbf90f8e9d947841cd2b7baa4a;hp=19d17f51db37a798c797b125795844b7a5d99e92;hpb=4d869de174c78ae29ca91b41581367c8092d933d;p=firefly-linux-kernel-4.4.55.git

diff --git a/arch/arm64/kernel/cpuidle.c b/arch/arm64/kernel/cpuidle.c
index 19d17f51db37..9047cab68fd3 100644
--- a/arch/arm64/kernel/cpuidle.c
+++ b/arch/arm64/kernel/cpuidle.c
@@ -15,17 +15,32 @@
 #include <asm/cpuidle.h>
 #include <asm/cpu_ops.h>
 
-int cpu_init_idle(unsigned int cpu)
+int __init arm_cpuidle_init(unsigned int cpu)
 {
 	int ret = -EOPNOTSUPP;
-	struct device_node *cpu_node = of_cpu_device_node_get(cpu);
-
-	if (!cpu_node)
-		return -ENODEV;
 
 	if (cpu_ops[cpu] && cpu_ops[cpu]->cpu_init_idle)
-		ret = cpu_ops[cpu]->cpu_init_idle(cpu_node, cpu);
+		ret = cpu_ops[cpu]->cpu_init_idle(cpu);
 
-	of_node_put(cpu_node);
 	return ret;
 }
+
+/**
+ * cpu_suspend() - function to enter a low-power idle state
+ * @arg: argument to pass to CPU suspend operations
+ *
+ * Return: 0 on success, -EOPNOTSUPP if CPU suspend hook not initialized, CPU
+ * operations back-end error code otherwise.
+ */
+int arm_cpuidle_suspend(int index)
+{
+	int cpu = smp_processor_id();
+
+	/*
+	 * If cpu_ops have not been registered or suspend
+	 * has not been initialized, cpu_suspend call fails early.
+	 */
+	if (!cpu_ops[cpu] || !cpu_ops[cpu]->cpu_suspend)
+		return -EOPNOTSUPP;
+	return cpu_ops[cpu]->cpu_suspend(index);
+}