| Message ID | 1521211467-6872-1-git-send-email-rogerq@ti.com |
|---|---|
| State | Accepted |
| Commit | 7d11c3ac66694097a1f409bc3559664c48390d73 |
| Headers | show |
| Series | usb: dwc3: core: Fix broken system suspend/resume on AM437x | expand |
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index e8890c0..5becd7f 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1374,6 +1374,7 @@ 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); @@ -1384,6 +1385,7 @@ 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:
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 <rogerq@ti.com> --- drivers/usb/dwc3/core.c | 2 ++ 1 file changed, 2 insertions(+) -- cheers, -roger Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki