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| author | Roger Quadros <rogerq@ti.com> | 2018-03-16 16:44:27 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-03-22 10:50:15 +0200 |
| commit | 7d11c3ac66694097a1f409bc3559664c48390d73 (patch) | |
| tree | 91e8aa088e43f6e4f99019646a61c4ccb7faed87 /drivers/usb | |
| parent | 2f3090c6a8f24d92ea569b099c5bdb5679dcf08a (diff) | |
| download | linux-7d11c3ac66694097a1f409bc3559664c48390d73.tar.gz linux-7d11c3ac66694097a1f409bc3559664c48390d73.tar.bz2 linux-7d11c3ac66694097a1f409bc3559664c48390d73.zip | |
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 <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
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: |