usb/misc: usb3503: Use pm_ptr() macro

Use the newly introduced pm_ptr() macro, and mark the suspend/resume
functions __maybe_unused. These functions can then be moved outside the
CONFIG_PM_SUSPEND block, and the compiler can then process them and
detect build failures independently of the config. If unused, they will
simply be discarded by the compiler.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200903112554.34263-8-paul@crapouillou.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/usb3503.c

@@ -322,47 +322,45 @@ static int usb3503_platform_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int usb3503_suspend(struct usb3503 *hub)
+static int __maybe_unused usb3503_suspend(struct usb3503 *hub)
 {
 	usb3503_switch_mode(hub, USB3503_MODE_STANDBY);
 	clk_disable_unprepare(hub->clk);
 
 	return 0;
 }
 
-static int usb3503_resume(struct usb3503 *hub)
+static int __maybe_unused usb3503_resume(struct usb3503 *hub)
 {
 	clk_prepare_enable(hub->clk);
 	usb3503_switch_mode(hub, hub->mode);
 
 	return 0;
 }
 
-static int usb3503_i2c_suspend(struct device *dev)
+static int __maybe_unused usb3503_i2c_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 
 	return usb3503_suspend(i2c_get_clientdata(client));
 }
 
-static int usb3503_i2c_resume(struct device *dev)
+static int __maybe_unused usb3503_i2c_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 
 	return usb3503_resume(i2c_get_clientdata(client));
 }
 
-static int usb3503_platform_suspend(struct device *dev)
+static int __maybe_unused usb3503_platform_suspend(struct device *dev)
 {
 	return usb3503_suspend(dev_get_drvdata(dev));
 }
 
-static int usb3503_platform_resume(struct device *dev)
+static int __maybe_unused usb3503_platform_resume(struct device *dev)
 {
 	return usb3503_resume(dev_get_drvdata(dev));
 }
-#endif
 
 static SIMPLE_DEV_PM_OPS(usb3503_i2c_pm_ops, usb3503_i2c_suspend,
 		usb3503_i2c_resume);
@@ -388,7 +386,7 @@ MODULE_DEVICE_TABLE(of, usb3503_of_match);
 static struct i2c_driver usb3503_i2c_driver = {
 	.driver = {
 		.name = USB3503_I2C_NAME,
-		.pm = &usb3503_i2c_pm_ops,
+		.pm = pm_ptr(&usb3503_i2c_pm_ops),
 		.of_match_table = of_match_ptr(usb3503_of_match),
 	},
 	.probe		= usb3503_i2c_probe,
@@ -400,7 +398,7 @@ static struct platform_driver usb3503_platform_driver = {
 	.driver = {
 		.name = USB3503_I2C_NAME,
 		.of_match_table = of_match_ptr(usb3503_of_match),
-		.pm = &usb3503_platform_pm_ops,
+		.pm = pm_ptr(&usb3503_platform_pm_ops),
 	},
 	.probe		= usb3503_platform_probe,
 	.remove		= usb3503_platform_remove,