linux-kernel - [PATCH 07/20] usb/misc: usb3503: Use pm

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Date:   Thu,  3 Sep 2020 13:25:41 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Peter Chen <Peter.Chen@....com>,
        Cristian Birsan <cristian.birsan@...rochip.com>,
        Felipe Balbi <balbi@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Tony Prisk <linux@...sktech.co.nz>, Bin Liu <b-liu@...com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, openbmc@...ts.ozlabs.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 07/20] 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@...pouillou.net>
---
 drivers/usb/misc/usb3503.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index 116bd789e568..48099c6bf04c 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -322,8 +322,7 @@ 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);
@@ -331,7 +330,7 @@ static int usb3503_suspend(struct usb3503 *hub)
 	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);
@@ -339,30 +338,29 @@ static int usb3503_resume(struct usb3503 *hub)
 	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,
-- 
2.28.0