drivers: misc: Suspend and resume in fan therm est

Bug 1205034
Bug 1210575

Change-Id: Ia639634a1a20ab7bc56ed941bc7efe1426509f83
Signed-off-by: Anshul Jain <anshulj@nvidia.com>
Reviewed-on: http://git-master/r/190815
(cherry picked from commit 49ecc8470a28345ec3ed932766a5f1776a8bf15b)
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Change-Id: Ib464f5a44aa61629a6d4e1211f492657b7f76e7b
Reviewed-on: http://git-master/r/199325

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/misc/therm_fan_est.c b/drivers/misc/therm_fan_est.c
index 3d261376d..7dcd2069a 100644
--- a/drivers/misc/therm_fan_est.c
+++ b/drivers/misc/therm_fan_est.c
@@ -335,9 +335,40 @@ static int __devexit therm_fan_est_remove(struct platform_device *pdev)
 
         if (!est)
                 return -EINVAL;
+
+        cancel_delayed_work(&est->therm_fan_est_work);
         thermal_zone_device_unregister(est->thz);
+
+        return 0;
+}
+
+#if CONFIG_PM
+static int therm_fan_est_suspend(struct platform_device *pdev,
+                                                        pm_message_t state)
+{
+        struct therm_fan_estimator *est = platform_get_drvdata(pdev);
+
+        if (!est)
+                return -EINVAL;
+
+        cancel_delayed_work(&est->therm_fan_est_work);
+
+        return 0;
+}
+
+static int therm_fan_est_resume(struct platform_device *pdev)
+{
+        struct therm_fan_estimator *est = platform_get_drvdata(pdev);
+
+        if (!est)
+                return -EINVAL;
+
+        queue_delayed_work(est->workqueue,
+                                &est->therm_fan_est_work,
+                                msecs_to_jiffies(est->polling_period));
         return 0;
 }
+#endif
 
 static struct platform_driver therm_fan_est_driver = {
         .driver = {
@@ -346,6 +377,10 @@ static struct platform_driver therm_fan_est_driver = {
         },
         .probe  = therm_fan_est_probe,
         .remove = __devexit_p(therm_fan_est_remove),
+#if CONFIG_PM
+        .suspend = therm_fan_est_suspend,
+        .resume = therm_fan_est_resume,
+#endif
 };
 
 module_platform_driver(therm_fan_est_driver);