diff options
| -rw-r--r-- | drivers/usb/dwc2/core.h | 2 | ||||
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 26 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index bef182993fa0..d83be5651f87 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -819,6 +819,7 @@ struct dwc2_hregs_backup { * @plat: The platform specific configuration data. This can be * removed once all SoCs support usb transceiver. * @supplies: Definition of USB power supplies + * @vbus_supply: Regulator supplying vbus. * @phyif: PHY interface width * @lock: Spinlock that protects all the driver data structures * @priv: Stores a pointer to the struct usb_hcd @@ -958,6 +959,7 @@ struct dwc2_hsotg { struct usb_phy *uphy; struct dwc2_hsotg_plat *plat; struct regulator_bulk_data supplies[DWC2_NUM_SUPPLIES]; + struct regulator *vbus_supply; u32 phyif; spinlock_t lock; diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 7341d5abe8e1..dcfda5eb4cac 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -356,6 +356,23 @@ static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg) dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); } +static int dwc2_vbus_supply_init(struct dwc2_hsotg *hsotg) +{ + hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus"); + if (IS_ERR(hsotg->vbus_supply)) + return 0; + + return regulator_enable(hsotg->vbus_supply); +} + +static int dwc2_vbus_supply_exit(struct dwc2_hsotg *hsotg) +{ + if (hsotg->vbus_supply) + return regulator_disable(hsotg->vbus_supply); + + return 0; +} + /** * dwc2_enable_host_interrupts() - Enables the Host mode interrupts * @@ -3275,6 +3292,7 @@ static void dwc2_conn_id_status_change(struct work_struct *work) /* B-Device connector (Device Mode) */ if (gotgctl & GOTGCTL_CONID_B) { + dwc2_vbus_supply_exit(hsotg); /* Wait for switch to device mode */ dev_dbg(hsotg->dev, "connId B\n"); if (hsotg->bus_suspended) { @@ -4323,6 +4341,9 @@ static int _dwc2_hcd_start(struct usb_hcd *hcd) } spin_unlock_irqrestore(&hsotg->lock, flags); + + dwc2_vbus_supply_init(hsotg); + return 0; } @@ -4350,6 +4371,8 @@ static void _dwc2_hcd_stop(struct usb_hcd *hcd) clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); spin_unlock_irqrestore(&hsotg->lock, flags); + dwc2_vbus_supply_exit(hsotg); + usleep_range(1000, 3000); } @@ -4386,6 +4409,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) hprt0 |= HPRT0_SUSP; hprt0 &= ~HPRT0_PWR; dwc2_writel(hprt0, hsotg->regs + HPRT0); + dwc2_vbus_supply_exit(hsotg); } /* Enter partial_power_down */ @@ -4466,6 +4490,8 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) spin_unlock_irqrestore(&hsotg->lock, flags); dwc2_port_resume(hsotg); } else { + dwc2_vbus_supply_init(hsotg); + /* Wait for controller to correctly update D+/D- level */ usleep_range(3000, 5000); |