From 7d11c3ac66694097a1f409bc3559664c48390d73 Mon Sep 17 00:00:00 2001 From: Roger Quadros Date: Fri, 16 Mar 2018 16:44:27 +0200 Subject: usb: dwc3: core: Fix broken system suspend/resume on AM437x On TI's AM437x, the DWC3 controller looses state after a system suspend/resume. We are re-initializing the controller but we miss restoring the PRTCAP register. This causes USB host to break on AM437x after a system suspend/resume. Fix this by restoring the PRTCAP register on system resume. Signed-off-by: Roger Quadros Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 7c8d3bedf802..814c986fc7be 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1440,6 +1440,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) if (ret) return ret; + dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE); spin_lock_irqsave(&dwc->lock, flags); dwc3_gadget_resume(dwc); spin_unlock_irqrestore(&dwc->lock, flags); @@ -1450,6 +1451,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) ret = dwc3_core_init(dwc); if (ret) return ret; + dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); } break; case DWC3_GCTL_PRTCAP_OTG: -- cgit v1.2.3-58-ga151