linux-kernel - [PATCH 11/20] usb/musb: musb_dsps: Use pm

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Date:   Thu,  3 Sep 2020 13:25:45 +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 11/20] usb/musb: musb_dsps: 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/musb/musb_dsps.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 30085b2be7b9..cb196bb6661d 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -665,26 +665,22 @@ dsps_dma_controller_create(struct musb *musb, void __iomem *base)
 	return controller;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static void dsps_dma_controller_suspend(struct dsps_glue *glue)
+static void __maybe_unused dsps_dma_controller_suspend(struct dsps_glue *glue)
 {
 	void __iomem *usbss_base = glue->usbss_base;
 
 	musb_writel(usbss_base, USBSS_IRQ_CLEARR, USBSS_IRQ_PD_COMP);
 }
 
-static void dsps_dma_controller_resume(struct dsps_glue *glue)
+static void __maybe_unused dsps_dma_controller_resume(struct dsps_glue *glue)
 {
 	void __iomem *usbss_base = glue->usbss_base;
 
 	musb_writel(usbss_base, USBSS_IRQ_ENABLER, USBSS_IRQ_PD_COMP);
 }
-#endif
 #else /* CONFIG_USB_TI_CPPI41_DMA */
-#ifdef CONFIG_PM_SLEEP
-static void dsps_dma_controller_suspend(struct dsps_glue *glue) {}
-static void dsps_dma_controller_resume(struct dsps_glue *glue) {}
-#endif
+static void __maybe_unused dsps_dma_controller_suspend(struct dsps_glue *glue) {}
+static void __maybe_unused dsps_dma_controller_resume(struct dsps_glue *glue) {}
 #endif /* CONFIG_USB_TI_CPPI41_DMA */
 
 static struct musb_platform_ops dsps_ops = {
@@ -961,8 +957,7 @@ static const struct of_device_id musb_dsps_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
 
-#ifdef CONFIG_PM_SLEEP
-static int dsps_suspend(struct device *dev)
+static int __maybe_unused dsps_suspend(struct device *dev)
 {
 	struct dsps_glue *glue = dev_get_drvdata(dev);
 	const struct dsps_musb_wrapper *wrp = glue->wrp;
@@ -996,7 +991,7 @@ static int dsps_suspend(struct device *dev)
 	return 0;
 }
 
-static int dsps_resume(struct device *dev)
+static int __maybe_unused dsps_resume(struct device *dev)
 {
 	struct dsps_glue *glue = dev_get_drvdata(dev);
 	const struct dsps_musb_wrapper *wrp = glue->wrp;
@@ -1024,7 +1019,6 @@ static int dsps_resume(struct device *dev)
 
 	return 0;
 }
-#endif
 
 static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
 
@@ -1033,7 +1027,7 @@ static struct platform_driver dsps_usbss_driver = {
 	.remove         = dsps_remove,
 	.driver         = {
 		.name   = "musb-dsps",
-		.pm	= &dsps_pm_ops,
+		.pm	= pm_ptr(&dsps_pm_ops),
 		.of_match_table	= musb_dsps_of_match,
 	},
 };
-- 
2.28.0