usb: chipidea: host: turn on vbus before add hcd if early vbus on is required

If CI_HDRC_TURN_VBUS_EARLY_ON is set, turn on vbus before adding hcd, so it
will not set reg_vbus of ehci_ci_priv, then vbus will not be handled by ehci core.

Signed-off-by: Li Jun <jun.li@freescale.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index feb9f073522798a194d3207770cf6a82191da205..21fe1a31431356d5056d4c443eb982a15ff25534 100644 (file)
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -44,11 +44,10 @@ static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
        struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
        struct device *dev = hcd->self.controller;
-       struct ci_hdrc *ci = dev_get_drvdata(dev);
        int ret = 0;
        int port = HCS_N_PORTS(ehci->hcs_params);
 
-       if (priv->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
+       if (priv->reg_vbus) {
                if (port > 1) {
                        dev_warn(dev,
                                "Not support multi-port regulator control\n");
@@ -114,12 +113,23 @@ static int host_start(struct ci_hdrc *ci)
        priv = (struct ehci_ci_priv *)ehci->priv;
        priv->reg_vbus = NULL;
 
-       if (ci->platdata->reg_vbus)
-               priv->reg_vbus = ci->platdata->reg_vbus;
+       if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
+               if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
+                       ret = regulator_enable(ci->platdata->reg_vbus);
+                       if (ret) {
+                               dev_err(ci->dev,
+                               "Failed to enable vbus regulator, ret=%d\n",
+                                                                       ret);
+                               goto put_hcd;
+                       }
+               } else {
+                       priv->reg_vbus = ci->platdata->reg_vbus;
+               }
+       }
 
        ret = usb_add_hcd(hcd, 0, 0);
        if (ret) {
-               goto put_hcd;
+               goto disable_reg;
        } else {
                struct usb_otg *otg = &ci->otg;
 
@@ -139,6 +149,10 @@ static int host_start(struct ci_hdrc *ci)
 
        return ret;
 
+disable_reg:
+       if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
+                       (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
+               regulator_disable(ci->platdata->reg_vbus);
 put_hcd:
        usb_put_hcd(hcd);
 
@@ -152,6 +166,9 @@ static void host_stop(struct ci_hdrc *ci)
        if (hcd) {
                usb_remove_hcd(hcd);
                usb_put_hcd(hcd);
+               if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
+                       (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
+                               regulator_disable(ci->platdata->reg_vbus);
        }
 }