usb: host: xhci-plat: add resume_quirk()

This patch adds resume_quirk() to do platform specific process in
resume timing.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-plat.c

@@ -55,6 +55,16 @@ static int xhci_priv_init_quirk(struct usb_hcd *hcd)
 	return priv->init_quirk(hcd);
 }
 
+static int xhci_priv_resume_quirk(struct usb_hcd *hcd)
+{
+	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
+
+	if (!priv->resume_quirk)
+		return 0;
+
+	return priv->resume_quirk(hcd);
+}
+
 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
 	/*
@@ -369,10 +379,15 @@ static int xhci_plat_resume(struct device *dev)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+	int ret;
 
 	if (!device_may_wakeup(dev) && !IS_ERR(xhci->clk))
 		clk_prepare_enable(xhci->clk);
 
+	ret = xhci_priv_resume_quirk(hcd);
+	if (ret)
+		return ret;
+
 	return xhci_resume(xhci, 0);
 }
 #endif /* CONFIG_PM_SLEEP */

drivers/usb/host/xhci-plat.h

@@ -17,6 +17,7 @@ struct xhci_plat_priv {
 	const char *firmware_name;
 	void (*plat_start)(struct usb_hcd *);
 	int (*init_quirk)(struct usb_hcd *);
+	int (*resume_quirk)(struct usb_hcd *);
 };
 
 #define hcd_to_xhci_priv(h) ((struct xhci_plat_priv *)hcd_to_xhci(h)->priv)