powerpc/fsl-pci: Add PCI controller ATMU PM support

Power supply for PCI controller ATMU registers is off when system go to
deep-sleep state. So ATMU registers should be re-setup during PCI
controllers resume from sleep.

Signed-off-by: Jia Hongtao <B38951@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/sysdev/fsl_pci.c

@@ -89,7 +89,7 @@ static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
 	return 0;
 }
 
-static int __init setup_one_atmu(struct ccsr_pci __iomem *pci,
+static int setup_one_atmu(struct ccsr_pci __iomem *pci,
 	unsigned int index, const struct resource *res,
 	resource_size_t offset)
 {
@@ -126,7 +126,7 @@ static int __init setup_one_atmu(struct ccsr_pci __iomem *pci,
 }
 
 /* atmu setup for fsl pci/pcie controller */
-static void __init setup_pci_atmu(struct pci_controller *hose,
+static void setup_pci_atmu(struct pci_controller *hose,
 				  struct resource *rsrc)
 {
 	struct ccsr_pci __iomem *pci;
@@ -902,9 +902,42 @@ static int __devinit fsl_pci_probe(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int fsl_pci_resume(struct device *dev)
+{
+	struct pci_controller *hose;
+	struct resource pci_rsrc;
+
+	hose = pci_find_hose_for_OF_device(dev->of_node);
+	if (!hose)
+		return -ENODEV;
+
+	if (of_address_to_resource(dev->of_node, 0, &pci_rsrc)) {
+		dev_err(dev, "Get pci register base failed.");
+		return -ENODEV;
+	}
+
+	setup_pci_atmu(hose, &pci_rsrc);
+
+	return 0;
+}
+
+static const struct dev_pm_ops pci_pm_ops = {
+	.resume = fsl_pci_resume,
+};
+
+#define PCI_PM_OPS (&pci_pm_ops)
+
+#else
+
+#define PCI_PM_OPS NULL
+
+#endif
+
 static struct platform_driver fsl_pci_driver = {
 	.driver = {
 		.name = "fsl-pci",
+		.pm = PCI_PM_OPS,
 		.of_match_table = pci_ids,
 	},
 	.probe = fsl_pci_probe,