linux-kernel - [PATCH v2] hwmon: tmp102: add hibernation callbacks

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Date:	Tue,  3 Feb 2015 17:01:58 +0200
From:	<grygorii.strashko@...aro.org>
To:	Jean Delvare <jdelvare@...e.de>,
	Guenter Roeck <linux@...ck-us.net>, lm-sensors@...sensors.org
Cc:	sumit.semwal@...aro.org, linux-arm-kernel@...ts.infradead.org,
	<linux-kernel@...r.kernel.org>, linux-pm@...r.kernel.org,
	Grygorii Strashko <Grygorii.Strashko@...aro.org>
Subject: [PATCH v2] hwmon: tmp102: add hibernation callbacks

From: Grygorii Strashko <Grygorii.Strashko@...aro.org>

Setting a dev_pm_ops suspend/resume pair but not a set of
hibernation functions means those pm functions will not be
called upon hibernation.
Fix this by using SIMPLE_DEV_PM_OPS, which appropriately
assigns the suspend and hibernation handlers and move
mp102_suspend/tmp102_resume under CONFIG_PM_SLEEP to avoid
build warnings.

Signed-off-by: Grygorii Strashko <Grygorii.Strashko@...aro.org>
---
V1:
- https://lkml.org/lkml/2015/2/2/509

 drivers/hwmon/tmp102.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/hwmon/tmp102.c b/drivers/hwmon/tmp102.c
index ba9f478..565df47 100644
--- a/drivers/hwmon/tmp102.c
+++ b/drivers/hwmon/tmp102.c
@@ -253,7 +253,7 @@ static int tmp102_remove(struct i2c_client *client)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int tmp102_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -279,17 +279,10 @@ static int tmp102_resume(struct device *dev)
 	config &= ~TMP102_CONF_SD;
 	return i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, config);
 }
-
-static const struct dev_pm_ops tmp102_dev_pm_ops = {
-	.suspend	= tmp102_suspend,
-	.resume		= tmp102_resume,
-};
-
-#define TMP102_DEV_PM_OPS (&tmp102_dev_pm_ops)
-#else
-#define	TMP102_DEV_PM_OPS NULL
 #endif /* CONFIG_PM */
 
+SIMPLE_DEV_PM_OPS(tmp102_dev_pm_ops, tmp102_suspend, tmp102_resume);
+
 static const struct i2c_device_id tmp102_id[] = {
 	{ "tmp102", 0 },
 	{ }
@@ -298,7 +291,7 @@ MODULE_DEVICE_TABLE(i2c, tmp102_id);
 
 static struct i2c_driver tmp102_driver = {
 	.driver.name	= DRIVER_NAME,
-	.driver.pm	= TMP102_DEV_PM_OPS,
+	.driver.pm	= &tmp102_dev_pm_ops,
 	.probe		= tmp102_probe,
 	.remove		= tmp102_remove,
 	.id_table	= tmp102_id,
-- 
1.9.1

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