From 799e9dc82968c66d6f8faf96d0bd01e515b0b2f2 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 23 Sep 2016 11:20:40 +0300 Subject: [PATCH] usb: dwc3: gadget: conditionally disable Link State change events 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 --- 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 99ad3ca..ee949420 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); } -- 2.7.4