[PATCH] usb: i.MX chipidea: Enable VBUS regulator when needed

[PATCH] usb: i.MX chipidea: Enable VBUS regulator when needed

[Sascha Hauer]

We should enable VBUS only in host mode, not unconditionally
during probe(). Fix that.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/usb/imx/chipidea-imx.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/imx/chipidea-imx.c b/drivers/usb/imx/chipidea-imx.c
index a799abe..9857fe5 100644
--- a/drivers/usb/imx/chipidea-imx.c
+++ b/drivers/usb/imx/chipidea-imx.c
@@ -150,13 +150,23 @@ static int imx_chipidea_probe_dt(struct imx_chipidea *ci)
 
 static int ci_register_role(struct imx_chipidea *ci)
 {
+	int ret;
+
 	if (ci->role_registered)
 		return -EBUSY;
 
 	if (ci->mode == IMX_USB_MODE_HOST) {
 		if (IS_ENABLED(CONFIG_USB_EHCI)) {
 			ci->role_registered = 1;
-			return ehci_register(ci->dev, &ci->data);
+			ret = regulator_enable(ci->vbus);
+			if (ret)
+				return ret;
+
+			ret = ehci_register(ci->dev, &ci->data);
+			if (!ret)
+				return 0;
+
+			regulator_disable(ci->vbus);
 		} else {
 			dev_err(ci->dev, "Host support not available\n");
 			return -ENODEV;
@@ -242,9 +252,8 @@ static int imx_chipidea_probe(struct device_d *dev)
 	}
 
 	ci->vbus = regulator_get(dev, "vbus");
-
-	if (!IS_ERR(ci->vbus))
-		regulator_enable(ci->vbus);
+	if (IS_ERR(ci->vbus))
+		ci->vbus = NULL;
 
 	iores = dev_request_mem_resource(dev, 0);
 	if (IS_ERR(iores))
-- 
2.8.1


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