1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 51e22bf89505..be5e70d2300c 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -14,6 +14,8 @@
 #include <linux/platform_device.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/dma-mapping.h>
 
 #include "xhci.h"
 
@@ -104,6 +106,15 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (!res)
 		return -ENODEV;
 
+	/* Initialize dma_mask and coherent_dma_mask to 32-bits */
+	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+	if (!pdev->dev.dma_mask)
+		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+	else
+		dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+
 	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
 	if (!hcd)
 		return -ENOMEM;
@@ -186,11 +197,46 @@ static int xhci_plat_remove(struct platform_device *dev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int xhci_plat_suspend(struct device *dev)
+{
+	struct usb_hcd	*hcd = dev_get_drvdata(dev);
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+
+	return xhci_suspend(xhci);
+}
+
+static int xhci_plat_resume(struct device *dev)
+{
+	struct usb_hcd	*hcd = dev_get_drvdata(dev);
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+
+	return xhci_resume(xhci, 0);
+}
+
+static const struct dev_pm_ops xhci_plat_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
+};
+#define DEV_PM_OPS	(&xhci_plat_pm_ops)
+#else
+#define DEV_PM_OPS	NULL
+#endif /* CONFIG_PM */
+
+#ifdef CONFIG_OF
+static const struct of_device_id usb_xhci_of_match[] = {
+	{ .compatible = "xhci-platform" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
+#endif
+
 static struct platform_driver usb_xhci_driver = {
 	.probe	= xhci_plat_probe,
 	.remove	= xhci_plat_remove,
 	.driver	= {
 		.name = "xhci-hcd",
+		.pm = DEV_PM_OPS,
+		.of_match_table = of_match_ptr(usb_xhci_of_match),
 	},
 };
 MODULE_ALIAS("platform:xhci-hcd");