Input: adxl34x - unify dev_pm_ops using EXPORT_SIMPLE_DEV_PM_OPS()

The I2C and SPI PM callbacks were identical (though wrapped in some
bouncing out to the bus specific container of the struct device and
then back again to get the drvdata).  As such rather than just moving
these to SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() take the opportunity
to unify the struct dev_pm_ops and use the new EXPORT_SIMPLE_DEV_PM_OPS()
macro so that we can drop the unused suspend and resume callbacks as well
as the structure if !CONFIG_PM_SLEEP without needing to mark the callbacks
__maybe_unused.

Signed-off-by: Jonathan Cameron <[email protected]>
Cc: Michael Hennerich <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dmitry Torokhov <[email protected]>

Author: jic23

drivers/input/misc/adxl34x-i2c.c

@@ -105,29 +105,6 @@ static void adxl34x_i2c_remove(struct i2c_client *client)
 	adxl34x_remove(ac);
 }
 
-static int __maybe_unused adxl34x_i2c_suspend(struct device *dev)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adxl34x *ac = i2c_get_clientdata(client);
-
-	adxl34x_suspend(ac);
-
-	return 0;
-}
-
-static int __maybe_unused adxl34x_i2c_resume(struct device *dev)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct adxl34x *ac = i2c_get_clientdata(client);
-
-	adxl34x_resume(ac);
-
-	return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend,
-			 adxl34x_i2c_resume);
-
 static const struct i2c_device_id adxl34x_id[] = {
 	{ "adxl34x", 0 },
 	{ }
@@ -155,7 +132,7 @@ MODULE_DEVICE_TABLE(of, adxl34x_of_id);
 static struct i2c_driver adxl34x_driver = {
 	.driver = {
 		.name = "adxl34x",
-		.pm = &adxl34x_i2c_pm,
+		.pm = pm_sleep_ptr(&adxl34x_pm),
 		.of_match_table = adxl34x_of_id,
 	},
 	.probe_new = adxl34x_i2c_probe,

drivers/input/misc/adxl34x-spi.c

@@ -94,33 +94,10 @@ static void adxl34x_spi_remove(struct spi_device *spi)
 	adxl34x_remove(ac);
 }
 
-static int __maybe_unused adxl34x_spi_suspend(struct device *dev)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	struct adxl34x *ac = spi_get_drvdata(spi);
-
-	adxl34x_suspend(ac);
-
-	return 0;
-}
-
-static int __maybe_unused adxl34x_spi_resume(struct device *dev)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	struct adxl34x *ac = spi_get_drvdata(spi);
-
-	adxl34x_resume(ac);
-
-	return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(adxl34x_spi_pm, adxl34x_spi_suspend,
-			 adxl34x_spi_resume);
-
 static struct spi_driver adxl34x_driver = {
 	.driver = {
 		.name = "adxl34x",
-		.pm = &adxl34x_spi_pm,
+		.pm = pm_sleep_ptr(&adxl34x_pm),
 	},
 	.probe   = adxl34x_spi_probe,
 	.remove  = adxl34x_spi_remove,

drivers/input/misc/adxl34x.c

@@ -412,8 +412,10 @@ static void __adxl34x_enable(struct adxl34x *ac)
 	AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE);
 }
 
-void adxl34x_suspend(struct adxl34x *ac)
+static int adxl34x_suspend(struct device *dev)
 {
+	struct adxl34x *ac = dev_get_drvdata(dev);
+
 	mutex_lock(&ac->mutex);
 
 	if (!ac->suspended && !ac->disabled && ac->opened)
@@ -422,11 +424,14 @@ void adxl34x_suspend(struct adxl34x *ac)
 	ac->suspended = true;
 
 	mutex_unlock(&ac->mutex);
+
+	return 0;
 }
-EXPORT_SYMBOL_GPL(adxl34x_suspend);
 
-void adxl34x_resume(struct adxl34x *ac)
+static int adxl34x_resume(struct device *dev)
 {
+	struct adxl34x *ac = dev_get_drvdata(dev);
+
 	mutex_lock(&ac->mutex);
 
 	if (ac->suspended && !ac->disabled && ac->opened)
@@ -435,8 +440,9 @@ void adxl34x_resume(struct adxl34x *ac)
 	ac->suspended = false;
 
 	mutex_unlock(&ac->mutex);
+
+	return 0;
 }
-EXPORT_SYMBOL_GPL(adxl34x_resume);
 
 static ssize_t adxl34x_disable_show(struct device *dev,
 				    struct device_attribute *attr, char *buf)
@@ -906,6 +912,8 @@ void adxl34x_remove(struct adxl34x *ac)
 }
 EXPORT_SYMBOL_GPL(adxl34x_remove);
 
+EXPORT_GPL_SIMPLE_DEV_PM_OPS(adxl34x_pm, adxl34x_suspend, adxl34x_resume);
+
 MODULE_AUTHOR("Michael Hennerich <[email protected]>");
 MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer Driver");
 MODULE_LICENSE("GPL");

drivers/input/misc/adxl34x.h

@@ -20,11 +20,11 @@ struct adxl34x_bus_ops {
 	int (*write)(struct device *, unsigned char, unsigned char);
 };
 
-void adxl34x_suspend(struct adxl34x *ac);
-void adxl34x_resume(struct adxl34x *ac);
 struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 			      bool fifo_delay_default,
 			      const struct adxl34x_bus_ops *bops);
 void adxl34x_remove(struct adxl34x *ac);
 
+extern const struct dev_pm_ops adxl34x_pm;
+
 #endif