USB: ohci: da8xx: Add wrappers for platform callbacks

To migrate to a DT based boot, we will remove the use of platform
callbacks, in favor of using the regulator framework to handle
vbus and over current.

In preparation to use a regulator instead of callbacks, move the platform
data callbacks into separate functions. This provides well defined place
to for the regulator API to coexist with the platform callbacks before
all users are converted.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ohci-da8xx.c

@@ -81,6 +81,72 @@ static void ohci_da8xx_disable(struct usb_hcd *hcd)
 	clk_disable_unprepare(da8xx_ohci->usb11_clk);
 }
 
+static int ohci_da8xx_set_power(struct usb_hcd *hcd, int on)
+{
+	struct device *dev		= hcd->self.controller;
+	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
+
+	if (hub && hub->set_power)
+		return hub->set_power(1, on);
+
+	return 0;
+}
+
+static int ohci_da8xx_get_power(struct usb_hcd *hcd)
+{
+	struct device *dev		= hcd->self.controller;
+	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
+
+	if (hub && hub->get_power)
+		return hub->get_power(1);
+
+	return 1;
+}
+
+static int ohci_da8xx_get_oci(struct usb_hcd *hcd)
+{
+	struct device *dev		= hcd->self.controller;
+	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
+
+	if (hub && hub->get_oci)
+		return hub->get_oci(1);
+
+	return 0;
+}
+
+static int ohci_da8xx_has_set_power(struct usb_hcd *hcd)
+{
+	struct device *dev		= hcd->self.controller;
+	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
+
+	if (hub && hub->set_power)
+		return 1;
+
+	return 0;
+}
+
+static int ohci_da8xx_has_oci(struct usb_hcd *hcd)
+{
+	struct device *dev		= hcd->self.controller;
+	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
+
+	if (hub && hub->get_oci)
+		return 1;
+
+	return 0;
+}
+
+static int ohci_da8xx_has_potpgt(struct usb_hcd *hcd)
+{
+	struct device *dev		= hcd->self.controller;
+	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
+
+	if (hub && hub->potpgt)
+		return 1;
+
+	return 0;
+}
+
 /*
  * Handle the port over-current indicator change.
  */
@@ -94,6 +160,26 @@ static void ohci_da8xx_ocic_handler(struct da8xx_ohci_root_hub *hub,
 		hub->set_power(port, 0);
 }
 
+static int ohci_da8xx_register_notify(struct usb_hcd *hcd)
+{
+	struct device *dev		= hcd->self.controller;
+	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
+
+	if (hub && hub->ocic_notify)
+		return hub->ocic_notify(ohci_da8xx_ocic_handler);
+
+	return 0;
+}
+
+static void ohci_da8xx_unregister_notify(struct usb_hcd *hcd)
+{
+	struct device *dev		= hcd->self.controller;
+	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
+
+	if (hub && hub->ocic_notify)
+		hub->ocic_notify(NULL);
+}
+
 static int ohci_da8xx_reset(struct usb_hcd *hcd)
 {
 	struct device *dev		= hcd->self.controller;
@@ -127,16 +213,18 @@ static int ohci_da8xx_reset(struct usb_hcd *hcd)
 	 * the correct hub descriptor...
 	 */
 	rh_a = ohci_readl(ohci, &ohci->regs->roothub.a);
-	if (hub->set_power) {
+	if (ohci_da8xx_has_set_power(hcd)) {
 		rh_a &= ~RH_A_NPS;
 		rh_a |=  RH_A_PSM;
 	}
-	if (hub->get_oci) {
+	if (ohci_da8xx_has_oci(hcd)) {
 		rh_a &= ~RH_A_NOCP;
 		rh_a |=  RH_A_OCPM;
 	}
-	rh_a &= ~RH_A_POTPGT;
-	rh_a |= hub->potpgt << 24;
+	if (ohci_da8xx_has_potpgt(hcd)) {
+		rh_a &= ~RH_A_POTPGT;
+		rh_a |= hub->potpgt << 24;
+	}
 	ohci_writel(ohci, rh_a, &ohci->regs->roothub.a);
 
 	return result;
@@ -169,7 +257,6 @@ static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				  u16 wIndex, char *buf, u16 wLength)
 {
 	struct device *dev		= hcd->self.controller;
-	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(dev);
 	int temp;
 
 	switch (typeReq) {
@@ -183,11 +270,11 @@ static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		temp = roothub_portstatus(hcd_to_ohci(hcd), wIndex - 1);
 
 		/* The port power status (PPS) bit defaults to 1 */
-		if (hub->get_power && hub->get_power(wIndex) == 0)
+		if (!ohci_da8xx_get_power(hcd))
 			temp &= ~RH_PS_PPS;
 
 		/* The port over-current indicator (POCI) bit is always 0 */
-		if (hub->get_oci && hub->get_oci(wIndex) > 0)
+		if (ohci_da8xx_get_oci(hcd) > 0)
 			temp |=  RH_PS_POCI;
 
 		/* The over-current indicator change (OCIC) bit is 0 too */
@@ -212,10 +299,7 @@ check_port:
 			dev_dbg(dev, "%sPortFeature(%u): %s\n",
 				temp ? "Set" : "Clear", wIndex, "POWER");
 
-			if (!hub->set_power)
-				return -EPIPE;
-
-			return hub->set_power(wIndex, temp) ? -EPIPE : 0;
+			return ohci_da8xx_set_power(hcd, temp) ? -EPIPE : 0;
 		case USB_PORT_FEAT_C_OVER_CURRENT:
 			dev_dbg(dev, "%sPortFeature(%u): %s\n",
 				temp ? "Set" : "Clear", wIndex,
@@ -237,15 +321,10 @@ check_port:
 
 static int ohci_da8xx_probe(struct platform_device *pdev)
 {
-	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(&pdev->dev);
 	struct da8xx_ohci_hcd *da8xx_ohci;
 	struct usb_hcd	*hcd;
 	struct resource *mem;
 	int error, irq;
-
-	if (hub == NULL)
-		return -ENODEV;
-
 	hcd = usb_create_hcd(&ohci_da8xx_hc_driver, &pdev->dev,
 				dev_name(&pdev->dev));
 	if (!hcd)
@@ -290,12 +369,13 @@ static int ohci_da8xx_probe(struct platform_device *pdev)
 
 	device_wakeup_enable(hcd->self.controller);
 
-	if (hub->ocic_notify) {
-		error = hub->ocic_notify(ohci_da8xx_ocic_handler);
-		if (!error)
-			return 0;
-	}
+	error = ohci_da8xx_register_notify(hcd);
+	if (error)
+		goto err_remove_hcd;
+
+	return 0;
 
+err_remove_hcd:
 	usb_remove_hcd(hcd);
 err:
 	usb_put_hcd(hcd);
@@ -305,9 +385,8 @@ err:
 static int ohci_da8xx_remove(struct platform_device *pdev)
 {
 	struct usb_hcd	*hcd = platform_get_drvdata(pdev);
-	struct da8xx_ohci_root_hub *hub	= dev_get_platdata(&pdev->dev);
 
-	hub->ocic_notify(NULL);
+	ohci_da8xx_unregister_notify(hcd);
 	usb_remove_hcd(hcd);
 	usb_put_hcd(hcd);