linux-kernel - [PATCH 1/2] rtc: rtc-ds1374: add CONFIG_PM

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Message-id: <00bb01ce26a3$0d69b800$283d2800$%han@samsung.com>
Date:	Fri, 22 Mar 2013 11:14:58 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Andrew Morton' <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	'Alessandro Zummo' <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, 'Jingoo Han' <jg1.han@...sung.com>
Subject: [PATCH 1/2] rtc: rtc-ds1374: add CONFIG_PM_SLEEP to suspend/resume
 functions

Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following
build warning when CONFIG_PM_SLEEP is not selected. This is because
sleep PM callbacks defined by SIMPLE_DEV_PM_OPS are only used when
the CONFIG_PM_SLEEP is enabled.

drivers/rtc/rtc-ds1374.c:413:12: warning: 'ds1374_suspend' defined but not used [-Wunused-function]
drivers/rtc/rtc-ds1374.c:422:12: warning: 'ds1374_resume' defined but not used [-Wunused-function]

Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
 drivers/rtc/rtc-ds1374.c |   10 +++-------
 1 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c
index fef7686..67cd1e3 100644
--- a/drivers/rtc/rtc-ds1374.c
+++ b/drivers/rtc/rtc-ds1374.c
@@ -409,7 +409,7 @@ static int ds1374_remove(struct i2c_client *client)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int ds1374_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -427,19 +427,15 @@ static int ds1374_resume(struct device *dev)
 		disable_irq_wake(client->irq);
 	return 0;
 }
+#endif
 
 static SIMPLE_DEV_PM_OPS(ds1374_pm, ds1374_suspend, ds1374_resume);
 
-#define DS1374_PM (&ds1374_pm)
-#else
-#define DS1374_PM NULL
-#endif
-
 static struct i2c_driver ds1374_driver = {
 	.driver = {
 		.name = "rtc-ds1374",
 		.owner = THIS_MODULE,
-		.pm = DS1374_PM,
+		.pm = &ds1374_pm,
 	},
 	.probe = ds1374_probe,
 	.remove = ds1374_remove,
-- 
1.7.2.5


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