diff --git a/drivers/sh/pm_runtime.c b/drivers/sh/pm_runtime.c
index 10c65eb51f85..00b82ec94442 100644
--- a/drivers/sh/pm_runtime.c
+++ b/drivers/sh/pm_runtime.c
@@ -21,18 +21,10 @@
 #include <linux/slab.h>
 
 #ifdef CONFIG_PM_RUNTIME
-
-static int default_platform_runtime_idle(struct device *dev)
-{
-	/* suspend synchronously to disable clocks immediately */
-	return 0;
-}
-
 static struct dev_pm_domain default_pm_domain = {
 	.ops = {
 		.runtime_suspend = pm_clk_suspend,
 		.runtime_resume = pm_clk_resume,
-		.runtime_idle = default_platform_runtime_idle,
 		USE_PLATFORM_PM_SLEEP_OPS
 	},
 };