diff options
Diffstat (limited to 'drivers/usb/cdns3/drd.c')
| -rw-r--r-- | drivers/usb/cdns3/drd.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/drivers/usb/cdns3/drd.c b/drivers/usb/cdns3/drd.c index 0fd465094101..605a413db727 100644 --- a/drivers/usb/cdns3/drd.c +++ b/drivers/usb/cdns3/drd.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Cadence USBSS DRD Driver. + * Cadence USBSS and USBSSP DRD Driver. * * Copyright (C) 2018-2020 Cadence. * Copyright (C) 2019 Texas Instruments @@ -103,6 +103,32 @@ int cdns_get_vbus(struct cdns *cdns) return vbus; } +void cdns_clear_vbus(struct cdns *cdns) +{ + u32 reg; + + if (cdns->version != CDNSP_CONTROLLER_V2) + return; + + reg = readl(&cdns->otg_cdnsp_regs->override); + reg |= OVERRIDE_SESS_VLD_SEL; + writel(reg, &cdns->otg_cdnsp_regs->override); +} +EXPORT_SYMBOL_GPL(cdns_clear_vbus); + +void cdns_set_vbus(struct cdns *cdns) +{ + u32 reg; + + if (cdns->version != CDNSP_CONTROLLER_V2) + return; + + reg = readl(&cdns->otg_cdnsp_regs->override); + reg &= ~OVERRIDE_SESS_VLD_SEL; + writel(reg, &cdns->otg_cdnsp_regs->override); +} +EXPORT_SYMBOL_GPL(cdns_set_vbus); + bool cdns_is_host(struct cdns *cdns) { if (cdns->dr_mode == USB_DR_MODE_HOST) @@ -449,5 +475,6 @@ int cdns_drd_init(struct cdns *cdns) int cdns_drd_exit(struct cdns *cdns) { cdns_otg_disable_irq(cdns); + return 0; } |