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authorLi Jun <b47624@freescale.com>2015-02-11 12:45:02 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-18 16:19:12 +0100
commit6594591741883e004aaba105951337878698b054 (patch)
tree7ef13ec6ae9fe91f8436dc4dae66d4881f74433c /drivers
parent6adb9b7b5fb64be3c3e4d57578ea1446da91a8f9 (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/chipidea/host.c27
1 files changed, 22 insertions, 5 deletions
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index feb9f0735227..21fe1a314313 100644
--- 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);
}
}