From d720f057fda4bae91a5108a11587374b9e396c6a Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@ti.com>
Date: Thu, 19 Jul 2012 14:01:10 +0300
Subject: [PATCH] usb: dwc3: exynos: add nop transceiver support

We will be adding support for transceivers on
dwc3 driver but not all boards have controllable
transceivers.

For those which don't provide controllable transceivers
we will register nop transceivers.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/usb/dwc3/dwc3-exynos.c | 66 ++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index b8f00389fa34..ca6597853f90 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -19,16 +19,74 @@
 #include <linux/platform_data/dwc3-exynos.h>
 #include <linux/dma-mapping.h>
 #include <linux/clk.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/nop-usb-xceiv.h>
 
 #include "core.h"
 
 struct dwc3_exynos {
 	struct platform_device	*dwc3;
+	struct platform_device	*usb2_phy;
+	struct platform_device	*usb3_phy;
 	struct device		*dev;
 
 	struct clk		*clk;
 };
 
+static int __devinit dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
+{
+	struct nop_usb_xceiv_platform_data pdata;
+	struct platform_device	*pdev;
+	int			ret;
+
+	memset(&pdata, 0x00, sizeof(pdata));
+
+	pdev = platform_device_alloc("nop_usb_xceiv", 0);
+	if (!pdev)
+		return -ENOMEM;
+
+	exynos->usb2_phy = pdev;
+	pdata.type = USB_PHY_TYPE_USB2;
+
+	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
+	if (ret)
+		goto err1;
+
+	pdev = platform_device_alloc("nop_usb_xceiv", 1);
+	if (!pdev) {
+		ret = -ENOMEM;
+		goto err1;
+	}
+
+	exynos->usb3_phy = pdev;
+	pdata.type = USB_PHY_TYPE_USB3;
+
+	ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
+	if (ret)
+		goto err2;
+
+	ret = platform_device_add(exynos->usb2_phy);
+	if (ret)
+		goto err2;
+
+	ret = platform_device_add(exynos->usb3_phy);
+	if (ret)
+		goto err3;
+
+	return 0;
+
+err3:
+	platform_device_del(exynos->usb2_phy);
+
+err2:
+	platform_device_put(exynos->usb3_phy);
+
+err1:
+	platform_device_put(exynos->usb2_phy);
+
+	return ret;
+}
+
 static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
 {
 	struct dwc3_exynos_data	*pdata = pdev->dev.platform_data;
@@ -51,6 +109,12 @@ static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
 	if (devid < 0)
 		goto err1;
 
+	ret = dwc3_exynos_register_phys(exynos);
+	if (ret) {
+		dev_err(&pdev->dev, "couldn't register PHYs\n");
+		goto err1;
+	}
+
 	dwc3 = platform_device_alloc("dwc3", devid);
 	if (!dwc3) {
 		dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
@@ -120,6 +184,8 @@ static int __devexit dwc3_exynos_remove(struct platform_device *pdev)
 	struct dwc3_exynos_data *pdata = pdev->dev.platform_data;
 
 	platform_device_unregister(exynos->dwc3);
+	platform_device_unregister(exynos->usb2_phy);
+	platform_device_unregister(exynos->usb3_phy);
 
 	dwc3_put_device_id(exynos->dwc3->id);
 
-- 
2.39.5