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Commit 8aa1802d authored by Sriharsha Allenki's avatar Sriharsha Allenki Committed by Gerrit - the friendly Code Review server
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dwc3: gadget: Remove soft reset as part of gadget run_stop 



Soft reset of the core before setting the run stop
bit of the core is not suggested.
So, remove the soft reset of the core as part of
the run_stop operation.

Change-Id: Ib87176d8036a27cc7e0a5790b293ee79811e4734
Signed-off-by: default avatarSriharsha Allenki <sallenki@codeaurora.org>
parent e2a4721c

drivers/usb/dwc3/gadget.c

+0 −19
Original line number Diff line number Diff line
@@ -1818,7 +1818,6 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) 
{

	u32			reg;

	u32			timeout = 500;

	ktime_t start, diff;



	reg = dwc3_readl(dwc->regs, DWC3_DCTL);

	if (is_on) {
@@ -1831,24 +1830,6 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) 
		if (dwc->revision >= DWC3_REVISION_194A)

			reg &= ~DWC3_DCTL_KEEP_CONNECT;



		start = ktime_get();

		/* issue device SoftReset */

		dwc3_writel(dwc->regs, DWC3_DCTL, reg | DWC3_DCTL_CSFTRST);

		do {

			reg = dwc3_readl(dwc->regs, DWC3_DCTL);

			if (!(reg & DWC3_DCTL_CSFTRST))

				break;



			diff = ktime_sub(ktime_get(), start);

			/* poll for max. 10ms */

			if (ktime_to_ms(diff) > DWC3_SOFT_RESET_TIMEOUT) {

				printk_ratelimited(KERN_ERR

					"%s:core Reset Timed Out\n", __func__);

				break;

			}

			cpu_relax();

		} while (true);





		dwc3_event_buffers_setup(dwc);

		dwc3_gadget_restart(dwc);