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Commit 6786610e authored by qctecmdr Service's avatar qctecmdr Service Committed by Gerrit - the friendly Code Review server
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Merge "usb: dwc3: Increase the inter packet gap for USB 2.0"

parents eb4f1e28 930f9fd0

drivers/usb/dwc3/core.c

+7 −0
Original line number Diff line number Diff line
@@ -1062,6 +1062,13 @@ int dwc3_core_init(struct dwc3 *dwc) 


	dwc3_notify_event(dwc, DWC3_CONTROLLER_POST_RESET_EVENT, 0);



	/* set inter-packet gap 199.794ns to improve EL_23 margin */

	if (dwc->revision >= DWC3_USB31_REVISION_170A) {

		reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);

		reg |= DWC3_GUCTL1_IP_GAP_ADD_ON(1);

		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);

	}



	return 0;



err3:

drivers/usb/dwc3/core.h

+1 −0
Original line number Diff line number Diff line
@@ -257,6 +257,7 @@ 
/* Global User Control 1 Register */

#define DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS	BIT(28)

#define DWC3_GUCTL1_DEV_L1_EXIT_BY_HW	BIT(24)

#define DWC3_GUCTL1_IP_GAP_ADD_ON(n)	(n << 21)



/* Global Status Register */

#define DWC3_GSTS_OTG_IP	BIT(10)