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usb: dwc3: gadget: Clear DCTL.ULSTCHNGREQ before set 

Send a no-action link state change request before the actual request
so DWC3 can send the same request whenever we call
dwc3_gadget_set_link_state().

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 2e708fa3b8987a6a76853cd4deaee990095a7b20)
This commit is contained in:
Thinh Nguyen 2019-10-23 19:15:55 -07:00 committed by Li Jun
parent 2ffb6631fb
commit 517eea63b2
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/dwc3/gadget.c
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@ -111,6 +111,9 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state)
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK;
/* set no action before sending new link state change */
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
/* set requested state */
reg |= DWC3_DCTL_ULSTCHNGREQ(state);
dwc3_writel(dwc->regs, DWC3_DCTL, reg);