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Date: Thu, 1 Mar 2007 08:56:06 +0100
From: Domen Puncer <domen.puncer@telargo.com>
To: linuxppc-embedded@ozlabs.org
Subject: [PATCH 4/7] mpc52xx suspend: USB
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Trivial suspend and resume OF OHCI.
On MPC52xx turn off and on power to ports.


Signed-off-by: Domen Puncer <domen.puncer@telargo.com>

Index: grant.git/drivers/usb/host/ohci-ppc-of.c
===================================================================
--- grant.git.orig/drivers/usb/host/ohci-ppc-of.c
+++ grant.git/drivers/usb/host/ohci-ppc-of.c
@@ -214,6 +214,32 @@ MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_
 #endif
 
 
+#ifdef CONFIG_PM
+static u32 descr_a;
+static int ohci_hcd_ppc_soc_drv_suspend(struct of_device *op,
+		pm_message_t state)
+{
+	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
+#ifdef CONFIG_PPC_MPC52xx
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+
+	descr_a = in_be32(&ohci->regs->roothub.a);
+	out_be32(&ohci->regs->roothub.a, (descr_a & ~0x200) | 0x100);
+#endif
+	return 0;
+}
+static int ohci_hcd_ppc_soc_drv_resume(struct of_device *op)
+{
+	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
+#ifdef CONFIG_PPC_MPC52xx
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+
+	out_be32(&ohci->regs->roothub.a, descr_a);
+#endif
+	return 0;
+}
+#endif
+
 static struct of_platform_driver ohci_hcd_ppc_of_driver = {
 	.name		= "ppc-of-ohci",
 	.match_table	= ohci_hcd_ppc_of_match,
@@ -221,8 +247,8 @@ static struct of_platform_driver ohci_hc
 	.remove		= ohci_hcd_ppc_of_remove,
 	.shutdown 	= ohci_hcd_ppc_of_shutdown,
 #ifdef CONFIG_PM
-	/*.suspend	= ohci_hcd_ppc_soc_drv_suspend,*/
-	/*.resume	= ohci_hcd_ppc_soc_drv_resume,*/
+	.suspend	= ohci_hcd_ppc_soc_drv_suspend,
+	.resume		= ohci_hcd_ppc_soc_drv_resume,
 #endif
 	.driver		= {
 		.name	= "ppc-of-ohci",