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usb: dwc3: make HIRD threshold configurable

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HIRD threshold should be configurable by different platforms.

From DesignWare databook:
When HIRD_Threshold[4] is set to 1b1 and HIRD value is greater than or
equal to the value in HIRD_Threshold[3:0], dwc3 asserts output signals
utmi_l1_suspend_n to put PHY into Deep Low-Power mode in L1.

When HIRD_Threshold[4] is set to 1b0 or the HIRD value is less than
HIRD_Threshold[3:0], dwc3 asserts output signals utmi_sleep_n on L1.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Huang Rui
2014-10-31 11:11:18 +08:00
committed by Felipe Balbi
parent 9755449d56
commit 460d098cb6
5 changed files with 30 additions and 5 deletions
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6
drivers/usb/dwc3/gadget.c
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@@ -2295,11 +2295,7 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN);
/*
* TODO: This should be configurable. For now using
* maximum allowed HIRD threshold value of 0b1100
*/
reg |= DWC3_DCTL_HIRD_THRES(12);
reg |= DWC3_DCTL_HIRD_THRES(dwc->hird_threshold);
/*
* When dwc3 revisions >= 2.40a, LPM Erratum is enabled and