Link State Change events are only needed for
debugging and to apply certain workarounds on known
errata. Let's save a few cycles by disabling these
events completely on working revisions of the core.
Signed-off-by: Felipe Balbi <felipe.ba...@linux.intel.com>
---
drivers/usb/dwc3/gadget.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 99ad3ca498aa..ee949420ee26 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1537,11 +1537,13 @@ static void dwc3_gadget_enable_irq(struct dwc3 *dwc)
DWC3_DEVTEN_CMDCMPLTEN |
DWC3_DEVTEN_ERRTICERREN |
DWC3_DEVTEN_WKUPEVTEN |
- DWC3_DEVTEN_ULSTCNGEN |
DWC3_DEVTEN_CONNECTDONEEN |
DWC3_DEVTEN_USBRSTEN |
DWC3_DEVTEN_DISCONNEVTEN);
+ if (dwc->revision < DWC3_REVISION_250A)
+ reg |= DWC3_DEVTEN_ULSTCNGEN;
+
dwc3_writel(dwc->regs, DWC3_DEVTEN, reg);
}
--
2.10.1
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