linux-kernel - [PATCH 6/6 v3] arm: omap: usb: global Suspend and resume support of ehci and ohci

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Date:	Fri, 8 Jul 2011 16:32:45 +0530
From:	Keshava Munegowda <keshava_mgowda@...com>
To:	<linux-usb@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC:	<keshava_mgowda@...com>, <balbi@...com>, <gadiyar@...com>,
	<sameo@...ux.intel.com>, <parthab@...ia.ti.com>,
	<tony@...mide.com>, <khilman@...com>, <b-cousson@...com>,
	<paul@...an.com>, <johnstul@...ibm.com>, <vishwanath.bs@...com>,
	<kishon@...com>
Subject: [PATCH 6/6 v3] arm: omap: usb: global Suspend and resume support of ehci and ohci

The global suspend and resume functions for ehci and ohci
drivers are implemented; these functions does the
pm_runtime_get_sync and pm_runtime_put_sync of the
parent device usbhs core driver respectively.

Signed-off-by: Keshava Munegowda <keshava_mgowda@...com>
---
 drivers/usb/host/ehci-omap.c  |   22 ++++++++++++++++++++--
 drivers/usb/host/ohci-omap3.c |   21 +++++++++++++++++++++
 2 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 178f63e..a02a684 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -259,14 +259,32 @@ static void ehci_hcd_omap_shutdown(struct platform_device *pdev)
 		hcd->driver->shutdown(hcd);
 }
 
+static int omap_ehci_resume(struct device *dev)
+{
+	if (dev->parent)
+		pm_runtime_get_sync(dev->parent);
+	return 0;
+}
+
+static int omap_ehci_suspend(struct device *dev)
+{
+	if (dev->parent)
+		pm_runtime_put_sync(dev->parent);
+	return 0;
+}
+
+static const struct dev_pm_ops omap_ehci_dev_pm_ops = {
+	.suspend	= omap_ehci_suspend,
+	.resume		= omap_ehci_resume,
+};
+
 static struct platform_driver ehci_hcd_omap_driver = {
 	.probe			= ehci_hcd_omap_probe,
 	.remove			= ehci_hcd_omap_remove,
 	.shutdown		= ehci_hcd_omap_shutdown,
-	/*.suspend		= ehci_hcd_omap_suspend, */
-	/*.resume		= ehci_hcd_omap_resume, */
 	.driver = {
 		.name		= "ehci-omap",
+		.pm		= &omap_ehci_dev_pm_ops,
 	}
 };
 
diff --git a/drivers/usb/host/ohci-omap3.c b/drivers/usb/host/ohci-omap3.c
index 6ce50de..a1a7981 100644
--- a/drivers/usb/host/ohci-omap3.c
+++ b/drivers/usb/host/ohci-omap3.c
@@ -230,12 +230,33 @@ static void ohci_hcd_omap3_shutdown(struct platform_device *pdev)
 		hcd->driver->shutdown(hcd);
 }
 
+
+static int omap_ohci_resume(struct device *dev)
+{
+	if (dev->parent)
+		pm_runtime_get_sync(dev->parent);
+	return 0;
+}
+
+static int omap_ohci_suspend(struct device *dev)
+{
+	if (dev->parent)
+		pm_runtime_put_sync(dev->parent);
+	return 0;
+}
+
+static const struct dev_pm_ops omap_ohci_dev_pm_ops = {
+	.suspend	= omap_ohci_suspend,
+	.resume		= omap_ohci_resume,
+};
+
 static struct platform_driver ohci_hcd_omap3_driver = {
 	.probe		= ohci_hcd_omap3_probe,
 	.remove		= __devexit_p(ohci_hcd_omap3_remove),
 	.shutdown	= ohci_hcd_omap3_shutdown,
 	.driver		= {
 		.name	= "ohci-omap3",
+		.pm		= &omap_ohci_dev_pm_ops,
 	},
 };
 
-- 
1.7.0.4

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