1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index dc7c033ef587..036e5865eb40 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -24,6 +24,7 @@
 #include <linux/ioport.h>
 #include <linux/io.h>
 #include <linux/clk.h>
+#include <linux/pm_runtime.h>
 #include <linux/irq.h>
 #include <linux/err.h>
 #include <linux/clocksource.h>
@@ -152,10 +153,12 @@ static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
 {
         int ret;
 
-        /* enable clock */
+        /* wake up device and enable clock */
+        pm_runtime_get_sync(&p->pdev->dev);
         ret = clk_enable(p->clk);
         if (ret) {
                 dev_err(&p->pdev->dev, "cannot enable clock\n");
+                pm_runtime_put_sync(&p->pdev->dev);
                 return ret;
         }
 
@@ -187,8 +190,9 @@ static void sh_cmt_disable(struct sh_cmt_priv *p)
         /* disable interrupts in CMT block */
         sh_cmt_write(p, CMCSR, 0);
 
-        /* stop clock */
+        /* stop clock and mark device as idle */
         clk_disable(p->clk);
+        pm_runtime_put_sync(&p->pdev->dev);
 }
 
 /* private flags */
@@ -660,6 +664,7 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev)
 
         if (p) {
                 dev_info(&pdev->dev, "kept as earlytimer\n");
+                pm_runtime_enable(&pdev->dev);
                 return 0;
         }
 
@@ -674,6 +679,9 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev)
                 kfree(p);
                 platform_set_drvdata(pdev, NULL);
         }
+
+        if (!is_early_platform_device(pdev))
+                pm_runtime_enable(&pdev->dev);
         return ret;
 }