set_vbus_power is used to enable or disable vbus power for usb host.

Signed-off-by: Richard Zhao <redacted>
---
 drivers/usb/chipidea/ci13xxx_imx.c |   39 +++++++++++++++++++++++++-----------
 drivers/usb/chipidea/host.c        |    8 ++++++++
 include/linux/usb/chipidea.h       |    2 ++
 3 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/drivers/usb/chipidea/ci13xxx_imx.c b/drivers/usb/chipidea/ci13xxx_imx.c
index c94e30f..b3173d8 100644
--- a/drivers/usb/chipidea/ci13xxx_imx.c
+++ b/drivers/usb/chipidea/ci13xxx_imx.c

@@ -26,6 +26,8 @@
 
 #define pdev_to_phy(pdev) \
 	((struct usb_phy *)platform_get_drvdata(pdev))
+#define ci_to_imx_data(ci) \
+	((struct ci13xxx_imx_data *)dev_get_drvdata(ci->dev->parent))
 
 struct ci13xxx_imx_data {
 	struct device_node *phy_np;

@@ -35,12 +37,32 @@ struct ci13xxx_imx_data {
 	struct regulator *reg_vbus;
 };
 
+static int ci13xxx_imx_vbus(struct ci13xxx *ci, int enable)
+{
+	struct ci13xxx_imx_data *data = ci_to_imx_data(ci);
+	int ret;
+
+	if (!data->reg_vbus)
+		return 0;
+
+	if (enable)
+		ret = regulator_enable(data->reg_vbus);
+	else
+		ret = regulator_disable(data->reg_vbus);
+	if (ret)
+		dev_err(ci->dev, "ci13xxx_imx_vbus failed, enable:%d err:%d\n",
+			enable, ret);
+
+	return ret;
+}
+
 static struct ci13xxx_platform_data ci13xxx_imx_platdata __devinitdata  = {
 	.name			= "ci13xxx_imx",
 	.flags			= CI13XXX_REQUIRE_TRANSCEIVER |
 				  CI13XXX_PULLUP_ON_VBUS |
 				  CI13XXX_DISABLE_STREAMING,
 	.capoffset		= DEF_CAPOFFSET,
+	.set_vbus_power		= ci13xxx_imx_vbus,
 };
 
 static int __devinit ci13xxx_imx_probe(struct platform_device *pdev)

@@ -101,18 +123,10 @@ static int __devinit ci13xxx_imx_probe(struct platform_device *pdev)
 
 	/* we only support host now, so enable vbus here */